ios ocr demo

deploy/ios_demo/download_dependencies.sh

+#!/bin/bash
+set -e
+
+OCR_MODEL_URL="https://paddleocr.bj.bcebos.com/deploy/lite/ocr_v1_for_cpu.tar.gz"
+PADDLE_LITE_LIB_URL="https://paddlelite-demo.bj.bcebos.com/libs/ios/paddle_lite_libs_v2_6_0.tar.gz"
+OPENCV3_FRAMEWORK_URL="https://paddlelite-demo.bj.bcebos.com/libs/ios/opencv3.framework.tar.gz"
+
+download_and_extract() {
+    local url="$1"
+    local dst_dir="$2"
+    local tempdir=$(mktemp -d)
+
+    echo "Downloading ${url} ..."
+    curl -L ${url} > ${tempdir}/temp.tar.gz
+    echo "Download ${url} done "
+
+    if [ ! -d ${dst_dir} ];then
+        mkdir -p ${dst_dir}
+    fi
+
+    echo "Extracting ..."
+    tar -zxvf ${tempdir}/temp.tar.gz -C ${dst_dir}
+    echo "Extract done "
+
+    rm -rf ${tempdir}
+}
+
+echo -e "[Download ios ocr demo denpendancy]\n"
+download_and_extract "${OCR_MODEL_URL}" "./ios-demo/ocr_demo/models"
+download_and_extract "${PADDLE_LITE_LIB_URL}" "./ios-demo/ocr_demo"
+download_and_extract "${OPENCV3_FRAMEWORK_URL}" "./ios-demo/ocr_demo"
+echo -e "[done]\n"

deploy/ios_demo/ocr_demo/AppDelegate.h

+//
+//  AppDelegate.h
+//  seg_demo
+//
+//  Created by Li,Xiaoyang(SYS) on 2018/11/13.
+//  Copyright © 2018年 Li,Xiaoyang(SYS). All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface AppDelegate : UIResponder <UIApplicationDelegate>
+
+@property (strong, nonatomic) UIWindow *window;
+
+
+@end
+

deploy/ios_demo/ocr_demo/AppDelegate.m

+//
+//  AppDelegate.m
+//  seg_demo
+//
+//  Created by Li,Xiaoyang(SYS) on 2018/11/13.
+//  Copyright © 2018年 Li,Xiaoyang(SYS). All rights reserved.
+//
+
+#import "AppDelegate.h"
+
+@interface AppDelegate ()
+
+@end
+
+@implementation AppDelegate
+
+
+- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
+    // Override point for customization after application launch.
+    return YES;
+}
+
+
+- (void)applicationWillResignActive:(UIApplication *)application {
+    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
+    // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
+}
+
+
+- (void)applicationDidEnterBackground:(UIApplication *)application {
+    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
+    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
+}
+
+
+- (void)applicationWillEnterForeground:(UIApplication *)application {
+    // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
+}
+
+
+- (void)applicationDidBecomeActive:(UIApplication *)application {
+    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
+}
+
+
+- (void)applicationWillTerminate:(UIApplication *)application {
+    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
+}
+
+
+@end

deploy/ios_demo/ocr_demo/Assets.xcassets/AppIcon.appiconset/Contents.json

+{
+  "images" : [
+    {
+      "idiom" : "iphone",
+      "size" : "20x20",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "20x20",
+      "scale" : "3x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "29x29",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "29x29",
+      "scale" : "3x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "40x40",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "40x40",
+      "scale" : "3x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "60x60",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "60x60",
+      "scale" : "3x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "20x20",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "20x20",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "29x29",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "29x29",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "40x40",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "40x40",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "76x76",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "76x76",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "83.5x83.5",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "ios-marketing",
+      "size" : "1024x1024",
+      "scale" : "1x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}
\ No newline at end of file

deploy/ios_demo/ocr_demo/Assets.xcassets/Contents.json

+{
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}
\ No newline at end of file

deploy/ios_demo/ocr_demo/Base.lproj/LaunchScreen.storyboard

+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13122.16" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13104.12"/>
+        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="EHf-IW-A2E">
+            <objects>
+                <viewController id="01J-lp-oVM" sceneMemberID="viewController">
+                    <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
+                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="53" y="375"/>
+        </scene>
+    </scenes>
+</document>

deploy/ios_demo/ocr_demo/Base.lproj/Main.storyboard

+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="16097" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
+    <device id="retina4_7" orientation="portrait" appearance="light"/>
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="16087"/>
+        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="tne-QT-ifu">
+            <objects>
+                <viewController id="BYZ-38-t0r" customClass="ViewController" sceneMemberID="viewController">
+                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
+                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <switch opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" contentHorizontalAlignment="center" contentVerticalAlignment="center" translatesAutoresizingMaskIntoConstraints="NO" id="yZw-YR-x44">
+                                <rect key="frame" x="114.5" y="624" width="51" height="31"/>
+                            </switch>
+                            <switch opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" contentHorizontalAlignment="center" contentVerticalAlignment="center" translatesAutoresizingMaskIntoConstraints="NO" id="wN7-2M-FdP">
+                                <rect key="frame" x="16" y="624" width="56" height="31"/>
+                            </switch>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="前/后摄像头" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="lu6-Fq-OIg">
+                                <rect key="frame" x="93" y="594" width="92" height="21"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                <nil key="textColor"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" horizontalCompressionResistancePriority="751" text="开启相机" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="VfD-z1-Okj">
+                                <rect key="frame" x="8" y="594" width="70" height="21"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                <nil key="textColor"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                            <imageView userInteractionEnabled="NO" contentMode="scaleToFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" translatesAutoresizingMaskIntoConstraints="NO" id="ptx-ND-Ywq">
+                                <rect key="frame" x="0.0" y="0.0" width="375" height="564"/>
+                            </imageView>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="T9y-OT-OQS">
+                                <rect key="frame" x="33" y="574" width="309" height="10"/>
+                                <constraints>
+                                    <constraint firstAttribute="height" constant="10" id="pMg-XK-d3N"/>
+                                </constraints>
+                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                <nil key="textColor"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="HJ5-UE-PrR">
+                                <rect key="frame" x="302" y="620.5" width="43" height="38"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="21"/>
+                                <state key="normal" title="拍照"/>
+                                <connections>
+                                    <action selector="cap_photo:" destination="BYZ-38-t0r" eventType="touchUpInside" id="PbV-pB-BRY"/>
+                                </connections>
+                            </button>
+                            <switch opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" contentHorizontalAlignment="center" contentVerticalAlignment="center" translatesAutoresizingMaskIntoConstraints="NO" id="rc6-ZX-igF">
+                                <rect key="frame" x="208" y="624" width="51" height="31"/>
+                                <connections>
+                                    <action selector="swith_video_photo:" destination="BYZ-38-t0r" eventType="valueChanged" id="I05-92-4FW"/>
+                                </connections>
+                            </switch>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="视频/拍照" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="0tm-fo-hjF">
+                                <rect key="frame" x="195" y="595" width="75" height="21"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                <nil key="textColor"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                        </subviews>
+                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <constraints>
+                            <constraint firstItem="VfD-z1-Okj" firstAttribute="top" secondItem="T9y-OT-OQS" secondAttribute="bottom" constant="10" id="BZ1-F0-re1"/>
+                            <constraint firstItem="wN7-2M-FdP" firstAttribute="top" secondItem="rc6-ZX-igF" secondAttribute="top" id="Gzf-hC-X6O"/>
+                            <constraint firstItem="wN7-2M-FdP" firstAttribute="leading" secondItem="8bC-Xf-vdC" secondAttribute="leadingMargin" id="JB8-MT-bdB"/>
+                            <constraint firstItem="lu6-Fq-OIg" firstAttribute="leading" secondItem="VfD-z1-Okj" secondAttribute="trailing" constant="15" id="JbA-wd-hE8"/>
+                            <constraint firstItem="wN7-2M-FdP" firstAttribute="centerX" secondItem="VfD-z1-Okj" secondAttribute="centerX" id="LW4-R4-nh2"/>
+                            <constraint firstItem="0tm-fo-hjF" firstAttribute="leading" secondItem="lu6-Fq-OIg" secondAttribute="trailing" constant="10" id="NDI-W8-717"/>
+                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="ptx-ND-Ywq" secondAttribute="trailing" id="V5z-FH-SFs"/>
+                            <constraint firstItem="ptx-ND-Ywq" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" id="dET-yr-Mon"/>
+                            <constraint firstItem="ptx-ND-Ywq" firstAttribute="top" secondItem="6Tk-OE-BBY" secondAttribute="top" id="fn8-6Z-tv4"/>
+                            <constraint firstItem="T9y-OT-OQS" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="33" id="iMB-Zg-Hsa"/>
+                            <constraint firstItem="VfD-z1-Okj" firstAttribute="leading" secondItem="6Tk-OE-BBY" secondAttribute="leading" constant="8" id="izE-la-Fhu"/>
+                            <constraint firstItem="wN7-2M-FdP" firstAttribute="top" secondItem="VfD-z1-Okj" secondAttribute="bottom" constant="9" id="jcU-7c-FNS"/>
+                            <constraint firstItem="HJ5-UE-PrR" firstAttribute="centerY" secondItem="rc6-ZX-igF" secondAttribute="centerY" id="lpA-wq-cXI"/>
+                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="T9y-OT-OQS" secondAttribute="trailing" constant="33" id="mD1-P0-mgB"/>
+                            <constraint firstItem="rc6-ZX-igF" firstAttribute="centerX" secondItem="0tm-fo-hjF" secondAttribute="centerX" id="p5w-6o-OqW"/>
+                            <constraint firstItem="rc6-ZX-igF" firstAttribute="top" secondItem="0tm-fo-hjF" secondAttribute="bottom" constant="8" id="rzr-oM-f7f"/>
+                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="trailing" secondItem="HJ5-UE-PrR" secondAttribute="trailing" constant="30" id="tYA-x1-MRj"/>
+                            <constraint firstItem="T9y-OT-OQS" firstAttribute="top" secondItem="ptx-ND-Ywq" secondAttribute="bottom" constant="10" id="vNp-h8-QF9"/>
+                            <constraint firstItem="VfD-z1-Okj" firstAttribute="baseline" secondItem="lu6-Fq-OIg" secondAttribute="baseline" id="wcZ-9g-OTX"/>
+                            <constraint firstItem="6Tk-OE-BBY" firstAttribute="bottom" secondItem="wN7-2M-FdP" secondAttribute="bottom" constant="12" id="xm2-Eb-dxp"/>
+                            <constraint firstItem="wN7-2M-FdP" firstAttribute="top" secondItem="yZw-YR-x44" secondAttribute="top" id="yHi-Fb-V4o"/>
+                            <constraint firstItem="yZw-YR-x44" firstAttribute="centerX" secondItem="lu6-Fq-OIg" secondAttribute="centerX" id="yXW-Ap-sa7"/>
+                            <constraint firstItem="VfD-z1-Okj" firstAttribute="centerY" secondItem="lu6-Fq-OIg" secondAttribute="centerY" id="zQ1-gg-Rnh"/>
+                        </constraints>
+                        <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
+                    </view>
+                    <connections>
+                        <outlet property="flag_back_cam" destination="yZw-YR-x44" id="z5O-BW-sm7"/>
+                        <outlet property="flag_process" destination="wN7-2M-FdP" id="i8h-CM-ida"/>
+                        <outlet property="flag_video" destination="rc6-ZX-igF" id="Uch-KB-gwF"/>
+                        <outlet property="imageView" destination="ptx-ND-Ywq" id="XjA-C2-hvm"/>
+                        <outlet property="result" destination="T9y-OT-OQS" id="6kB-Ha-dfo"/>
+                    </connections>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="53.600000000000001" y="62.518740629685162"/>
+        </scene>
+    </scenes>
+</document>

deploy/ios_demo/ocr_demo/BoxLayer.h

+//
+// Created by chenxiaoyu on 2018/5/5.
+// Copyright (c) 2018 baidu. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import <UIKit/UIKit.h>
+#import "OcrData.h"
+
+
+@interface BoxLayer : CAShapeLayer
+
+/**
+ * 绘制OCR的结果
+ */
+-(void) renderOcrPolygon: (OcrData *)data withHeight:(CGFloat)originHeight withWidth:(CGFloat)originWidth withLabel:(bool) withLabel;
+
+
+
+@end

deploy/ios_demo/ocr_demo/BoxLayer.m

+//
+// Created by chenxiaoyu on 2018/5/5.
+// Copyright (c) 2018 baidu. All rights reserved.
+//
+
+#include "BoxLayer.h"
+#import "Helpers.h"
+
+@implementation BoxLayer {
+
+}
+
+#define MAIN_COLOR UIColorFromRGB(0x3B85F5)
+- (void)renderOcrPolygon:(OcrData *)d withHeight:(CGFloat)originHeight withWidth:(CGFloat)originWidth withLabel:(bool)withLabel {
+
+    if ([d.polygonPoints count] != 4) {
+        NSLog(@"poloygonPoints size is not 4");
+        return;
+    }
+
+    CGPoint startPoint = [d.polygonPoints[0] CGPointValue];
+    NSString *text = d.label;
+
+    CGFloat x = startPoint.x * originWidth;
+    CGFloat y = startPoint.y * originHeight;
+    CGFloat width = originWidth - x;
+    CGFloat height = originHeight - y;
+
+
+    UIFont *font = [UIFont systemFontOfSize:16];
+    NSDictionary *attrs = @{
+//            NSStrokeColorAttributeName: [UIColor blackColor],
+            NSForegroundColorAttributeName: [UIColor whiteColor],
+//            NSStrokeWidthAttributeName : @((float) -6.0),
+            NSFontAttributeName: font
+    };
+
+
+    if (withLabel) {
+        NSAttributedString *displayStr = [[NSAttributedString alloc] initWithString:text attributes:attrs];
+        CATextLayer *textLayer = [[CATextLayer alloc] init];
+        textLayer.wrapped = YES;
+        textLayer.string = displayStr;
+        textLayer.frame = CGRectMake(x + 2, y + 2, width, height);
+        textLayer.contentsScale = [[UIScreen mainScreen] scale];
+
+        // 加阴影显得有点乱
+//    textLayer.shadowColor = [MAIN_COLOR CGColor];
+//    textLayer.shadowOffset = CGSizeMake(2.0, 2.0);
+//    textLayer.shadowOpacity = 0.8;
+//    textLayer.shadowRadius = 0.0;
+
+        [self addSublayer:textLayer];
+    }
+
+
+    UIBezierPath *path = [UIBezierPath new];
+
+
+    [path moveToPoint:CGPointMake(startPoint.x * originWidth, startPoint.y * originHeight)];
+    for (NSValue *val in d.polygonPoints) {
+        CGPoint p = [val CGPointValue];
+        [path addLineToPoint:CGPointMake(p.x * originWidth, p.y * originHeight)];
+    }
+    [path closePath];
+
+    self.path = path.CGPath;
+    self.strokeColor = MAIN_COLOR.CGColor;
+    self.lineWidth = 2.0;
+    self.fillColor = [MAIN_COLOR colorWithAlphaComponent:0.2].CGColor;
+    self.lineJoin = kCALineJoinBevel;
+
+}
+
+- (void)renderSingleBox:(OcrData *)data withHeight:(CGFloat)originHeight withWidth:(CGFloat)originWidth {
+    [self renderOcrPolygon:data withHeight:originHeight withWidth:originWidth withLabel:YES];
+}
+
+
+@end

deploy/ios_demo/ocr_demo/Helpers.h

+//
+//  Helpers.h
+//  EasyDLDemo
+//
+//  Created by chenxiaoyu on 2018/5/14.
+//  Copyright © 2018年 baidu. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import <UIKit/UIImage.h>
+
+#define UIColorFromRGB(rgbValue) \
+[UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 \
+green:((float)((rgbValue & 0x00FF00) >>  8))/255.0 \
+blue:((float)((rgbValue & 0x0000FF) >>  0))/255.0 \
+alpha:1.0]
+
+#define SCREEN_HEIGHT  [UIScreen mainScreen].bounds.size.height
+#define SCREEN_WIDTH  [UIScreen mainScreen].bounds.size.width
+
+#define HIGHLIGHT_COLOR UIColorFromRGB(0xF5A623)
+
+//#define BTN_HIGHTLIGH_TEXT_COLOR UIColorFromRGB(0xF5A623)
+
+
+@interface Helpers : NSObject {
+
+
+}
+
+@end

deploy/ios_demo/ocr_demo/Helpers.m

+//
+//  Helpers.m
+//  EasyDLDemo
+//
+//  Created by chenxiaoyu on 2018/5/14.
+//  Copyright © 2018年 baidu. All rights reserved.
+//
+
+#import "Helpers.h"
+
+
+
+@implementation Helpers
+
+
+
+@end

deploy/ios_demo/ocr_demo/Info.plist

+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleDisplayName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>0.1</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>NSCameraUsageDescription</key>
+	<string>for test</string>
+	<key>UILaunchStoryboardName</key>
+	<string>LaunchScreen</string>
+	<key>UIMainStoryboardFile</key>
+	<string>Main</string>
+	<key>UIRequiredDeviceCapabilities</key>
+	<array>
+		<string>armv7</string>
+	</array>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+</dict>
+</plist>

deploy/ios_demo/ocr_demo/OcrData.h

+//
+// Created by Lv,Xiangxiang on 2020/7/11.
+// Copyright (c) 2020 Li,Xiaoyang(SYS). All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+
+@interface OcrData : NSObject
+@property(nonatomic, copy) NSString *label;
+@property(nonatomic) int category;
+@property(nonatomic) float accuracy;
+@property(nonatomic) NSArray *polygonPoints;
+
+@end
\ No newline at end of file

deploy/ios_demo/ocr_demo/OcrData.m

+//
+// Created by Lv,Xiangxiang on 2020/7/11.
+// Copyright (c) 2020 Li,Xiaoyang(SYS). All rights reserved.
+//
+
+#import "OcrData.h"
+
+
+@implementation OcrData {
+
+}
+@end
\ No newline at end of file

deploy/ios_demo/ocr_demo/ViewController.h

+//
+//  ViewController.h
+//  seg_demo
+//
+//  Created by Li,Xiaoyang(SYS) on 2018/11/13.
+//  Copyright © 2018年 Li,Xiaoyang(SYS). All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+
+@interface ViewController : UIViewController
+
+
+@end
+

deploy/ios_demo/ocr_demo/ViewController.mm

+//
+// Created by lvxiangxiang on 2020/7/10.
+// Copyright (c) 2020 baidu. All rights reserved.
+//
+
+#import <opencv2/opencv.hpp>
+#import <opencv2/imgcodecs/ios.h>
+#import <opencv2/videoio/cap_ios.h>
+//#import <opencv2/highgui/ios.h>
+#import "ViewController.h"
+#import "BoxLayer.h"
+
+#include "include/paddle_api.h"
+#include "timer.h"
+#import "pdocr/ocr_db_post_process.h"
+#import "pdocr/ocr_crnn_process.h"
+
+using namespace paddle::lite_api;
+using namespace cv;
+
+struct Object {
+    int batch_id;
+    cv::Rect rec;
+    int class_id;
+    float prob;
+};
+
+std::mutex mtx;
+std::shared_ptr<PaddlePredictor> net_ocr1;
+std::shared_ptr<PaddlePredictor> net_ocr2;
+Timer tic;
+long long count = 0;
+
+double tensor_mean(const Tensor &tin) {
+    auto shape = tin.shape();
+    int64_t size = 1;
+    for (int i = 0; i < shape.size(); i++) {
+        size *= shape[i];
+    }
+    double mean = 0.;
+    auto ptr = tin.data<float>();
+    for (int i = 0; i < size; i++) {
+        mean += ptr[i];
+    }
+    return mean / size;
+}
+
+cv::Mat resize_img_type0(const cv::Mat &img, int max_size_len, float *ratio_h, float *ratio_w) {
+    int w = img.cols;
+    int h = img.rows;
+
+    float ratio = 1.f;
+    int max_wh = w >= h ? w : h;
+    if (max_wh > max_size_len) {
+        if (h > w) {
+            ratio = float(max_size_len) / float(h);
+        } else {
+            ratio = float(max_size_len) / float(w);
+        }
+    }
+
+    int resize_h = int(float(h) * ratio);
+    int resize_w = int(float(w) * ratio);
+    if (resize_h % 32 == 0)
+        resize_h = resize_h;
+    else if (resize_h / 32 < 1)
+        resize_h = 32;
+    else
+        resize_h = (resize_h / 32 - 1) * 32;
+
+    if (resize_w % 32 == 0)
+        resize_w = resize_w;
+    else if (resize_w / 32 < 1)
+        resize_w = 32;
+    else
+        resize_w = (resize_w / 32 - 1) * 32;
+
+    cv::Mat resize_img;
+    cv::resize(img, resize_img, cv::Size(resize_w, resize_h));
+
+    *ratio_h = float(resize_h) / float(h);
+    *ratio_w = float(resize_w) / float(w);
+    return resize_img;
+}
+
+void neon_mean_scale(const float *din, float *dout, int size, std::vector<float> mean, std::vector<float> scale) {
+    float32x4_t vmean0 = vdupq_n_f32(mean[0]);
+    float32x4_t vmean1 = vdupq_n_f32(mean[1]);
+    float32x4_t vmean2 = vdupq_n_f32(mean[2]);
+    float32x4_t vscale0 = vdupq_n_f32(1.f / scale[0]);
+    float32x4_t vscale1 = vdupq_n_f32(1.f / scale[1]);
+    float32x4_t vscale2 = vdupq_n_f32(1.f / scale[2]);
+
+    float *dout_c0 = dout;
+    float *dout_c1 = dout + size;
+    float *dout_c2 = dout + size * 2;
+
+    int i = 0;
+    for (; i < size - 3; i += 4) {
+        float32x4x3_t vin3 = vld3q_f32(din);
+        float32x4_t vsub0 = vsubq_f32(vin3.val[0], vmean0);
+        float32x4_t vsub1 = vsubq_f32(vin3.val[1], vmean1);
+        float32x4_t vsub2 = vsubq_f32(vin3.val[2], vmean2);
+        float32x4_t vs0 = vmulq_f32(vsub0, vscale0);
+        float32x4_t vs1 = vmulq_f32(vsub1, vscale1);
+        float32x4_t vs2 = vmulq_f32(vsub2, vscale2);
+        vst1q_f32(dout_c0, vs0);
+        vst1q_f32(dout_c1, vs1);
+        vst1q_f32(dout_c2, vs2);
+
+        din += 12;
+        dout_c0 += 4;
+        dout_c1 += 4;
+        dout_c2 += 4;
+    }
+    for (; i < size; i++) {
+        *(dout_c0++) = (*(din++) - mean[0]) / scale[0];
+        *(dout_c1++) = (*(din++) - mean[1]) / scale[1];
+        *(dout_c2++) = (*(din++) - mean[2]) / scale[2];
+    }
+}
+
+
+// fill tensor with mean and scale, neon speed up
+void fill_tensor_with_cvmat(const Mat &img_in, Tensor &tout, int width, int height,
+        std::vector<float> mean, std::vector<float> scale, bool is_scale) {
+    if (img_in.channels() == 4) {
+        cv::cvtColor(img_in, img_in, CV_RGBA2RGB);
+    }
+    cv::Mat im;
+    cv::resize(img_in, im, cv::Size(width, height), 0.f, 0.f);
+    cv::Mat imgf;
+    float scale_factor = is_scale ? 1 / 255.f : 1.f;
+    im.convertTo(imgf, CV_32FC3, scale_factor);
+    const float *dimg = reinterpret_cast<const float *>(imgf.data);
+    float *dout = tout.mutable_data<float>();
+    neon_mean_scale(dimg, dout, width * height, mean, scale);
+}
+
+std::vector<Object> detect_object(const float *data,
+        int count,
+        const std::vector<std::vector<uint64_t>> &lod,
+        const float thresh,
+        Mat &image) {
+    std::vector<Object> rect_out;
+    const float *dout = data;
+    for (int iw = 0; iw < count; iw++) {
+        int oriw = image.cols;
+        int orih = image.rows;
+        if (dout[1] > thresh && static_cast<int>(dout[0]) > 0) {
+            Object obj;
+            int x = static_cast<int>(dout[2] * oriw);
+            int y = static_cast<int>(dout[3] * orih);
+            int w = static_cast<int>(dout[4] * oriw) - x;
+            int h = static_cast<int>(dout[5] * orih) - y;
+            cv::Rect rec_clip = cv::Rect(x, y, w, h) & cv::Rect(0, 0, image.cols, image.rows);
+            obj.batch_id = 0;
+            obj.class_id = static_cast<int>(dout[0]);
+            obj.prob = dout[1];
+            obj.rec = rec_clip;
+            if (w > 0 && h > 0 && obj.prob <= 1) {
+                rect_out.push_back(obj);
+                cv::rectangle(image, rec_clip, cv::Scalar(255, 0, 0));
+            }
+        }
+        dout += 6;
+    }
+    return rect_out;
+}
+
+@interface ViewController () <CvVideoCameraDelegate>
+@property(weak, nonatomic) IBOutlet UIImageView *imageView;
+@property(weak, nonatomic) IBOutlet UISwitch *flag_process;
+@property(weak, nonatomic) IBOutlet UISwitch *flag_video;
+@property(weak, nonatomic) IBOutlet UIImageView *preView;
+@property(weak, nonatomic) IBOutlet UISwitch *flag_back_cam;
+@property(weak, nonatomic) IBOutlet UILabel *result;
+@property(nonatomic, strong) CvVideoCamera *videoCamera;
+@property(nonatomic, strong) UIImage *image;
+@property(nonatomic) bool flag_init;
+@property(nonatomic) bool flag_cap_photo;
+@property(nonatomic) std::vector<float> scale;
+@property(nonatomic) std::vector<float> mean;
+@property(nonatomic) NSArray *labels;
+@property(nonatomic) cv::Mat cvimg;
+@property(nonatomic, strong) UIImage *ui_img_test;
+@property(strong, nonatomic) CALayer *boxLayer;
+
+@end
+
+@implementation ViewController
+@synthesize imageView;
+
+- (OcrData *)paddleOcrRec:(cv::Mat)image {
+
+    OcrData *result = [OcrData new];
+
+    std::vector<float> mean = {0.5f, 0.5f, 0.5f};
+    std::vector<float> scale = {1 / 0.5f, 1 / 0.5f, 1 / 0.5f};
+
+    cv::Mat crop_img;
+    image.copyTo(crop_img);
+    cv::Mat resize_img;
+
+
+    float wh_ratio = float(crop_img.cols) / float(crop_img.rows);
+
+    resize_img = crnn_resize_img(crop_img, wh_ratio);
+    resize_img.convertTo(resize_img, CV_32FC3, 1 / 255.f);
+
+    const float *dimg = reinterpret_cast<const float *>(resize_img.data);
+
+    std::unique_ptr<Tensor> input_tensor0(std::move(net_ocr2->GetInput(0)));
+    input_tensor0->Resize({1, 3, resize_img.rows, resize_img.cols});
+    auto *data0 = input_tensor0->mutable_data<float>();
+
+    neon_mean_scale(dimg, data0, resize_img.rows * resize_img.cols, mean, scale);
+
+    //// Run CRNN predictor
+    net_ocr2->Run();
+
+    // Get output and run postprocess
+    std::unique_ptr<const Tensor> output_tensor0(std::move(net_ocr2->GetOutput(0)));
+    auto *rec_idx = output_tensor0->data<int>();
+
+    auto rec_idx_lod = output_tensor0->lod();
+    auto shape_out = output_tensor0->shape();
+    NSMutableString *text = [[NSMutableString alloc] init];
+    for (int n = int(rec_idx_lod[0][0]); n < int(rec_idx_lod[0][1] * 2); n += 2) {
+        if (rec_idx[n] >= self.labels.count) {
+            std::cout << "Index " << rec_idx[n] << " out of text dict range!" << std::endl;
+            continue;
+        }
+        [text appendString:self.labels[rec_idx[n]]];
+    }
+
+    result.label = text;
+    // get score
+    std::unique_ptr<const Tensor> output_tensor1(std::move(net_ocr2->GetOutput(1)));
+    auto *predict_batch = output_tensor1->data<float>();
+    auto predict_shape = output_tensor1->shape();
+
+    auto predict_lod = output_tensor1->lod();
+
+    int argmax_idx;
+    int blank = predict_shape[1];
+    float score = 0.f;
+    int count = 0;
+    float max_value = 0.0f;
+
+    for (int n = predict_lod[0][0]; n < predict_lod[0][1] - 1; n++) {
+        argmax_idx = int(argmax(&predict_batch[n * predict_shape[1]], &predict_batch[(n + 1) * predict_shape[1]]));
+        max_value = float(*std::max_element(&predict_batch[n * predict_shape[1]], &predict_batch[(n + 1) * predict_shape[1]]));
+
+        if (blank - 1 - argmax_idx > 1e-5) {
+            score += max_value;
+            count += 1;
+        }
+
+    }
+    score /= count;
+    result.accuracy = score;
+    return result;
+}
+- (NSArray *) ocr_infer:(cv::Mat) originImage{
+    int max_side_len = 960;
+    float ratio_h{};
+    float ratio_w{};
+    cv::Mat image;
+    cv::cvtColor(originImage, image, cv::COLOR_RGB2BGR);
+
+    cv::Mat img;
+    image.copyTo(img);
+
+    img = resize_img_type0(img, max_side_len, &ratio_h, &ratio_w);
+    cv::Mat img_fp;
+    img.convertTo(img_fp, CV_32FC3, 1.0 / 255.f);
+
+    std::unique_ptr<Tensor> input_tensor(net_ocr1->GetInput(0));
+    input_tensor->Resize({1, 3, img_fp.rows, img_fp.cols});
+    auto *data0 = input_tensor->mutable_data<float>();
+    const float *dimg = reinterpret_cast<const float *>(img_fp.data);
+    neon_mean_scale(dimg, data0, img_fp.rows * img_fp.cols, self.mean, self.scale);
+    tic.clear();
+    tic.start();
+    net_ocr1->Run();
+    std::unique_ptr<const Tensor> output_tensor(std::move(net_ocr1->GetOutput(0)));
+    auto *outptr = output_tensor->data<float>();
+    auto shape_out = output_tensor->shape();
+
+    int64_t out_numl = 1;
+    double sum = 0;
+    for (auto i : shape_out) {
+        out_numl *= i;
+    }
+
+    int s2 = int(shape_out[2]);
+    int s3 = int(shape_out[3]);
+
+    cv::Mat pred_map = cv::Mat::zeros(s2, s3, CV_32F);
+    memcpy(pred_map.data, outptr, s2 * s3 * sizeof(float));
+    cv::Mat cbuf_map;
+    pred_map.convertTo(cbuf_map, CV_8UC1, 255.0f);
+
+    const double threshold = 0.1 * 255;
+    const double maxvalue = 255;
+    cv::Mat bit_map;
+    cv::threshold(cbuf_map, bit_map, threshold, maxvalue, cv::THRESH_BINARY);
+
+    auto boxes = boxes_from_bitmap(pred_map, bit_map);
+
+    std::vector<std::vector<std::vector<int>>> filter_boxes = filter_tag_det_res(boxes, ratio_h, ratio_w, image);
+
+
+    cv::Point rook_points[filter_boxes.size()][4];
+
+    for (int n = 0; n < filter_boxes.size(); n++) {
+        for (int m = 0; m < filter_boxes[0].size(); m++) {
+            rook_points[n][m] = cv::Point(int(filter_boxes[n][m][0]), int(filter_boxes[n][m][1]));
+        }
+    }
+
+    NSMutableArray *result = [[NSMutableArray alloc] init];
+
+    for (int i = 0; i < filter_boxes.size(); i++) {
+        cv::Mat crop_img;
+        crop_img = get_rotate_crop_image(image, filter_boxes[i]);
+        OcrData *r = [self paddleOcrRec:crop_img ];
+        NSMutableArray *points = [NSMutableArray new];
+        for (int jj = 0; jj < 4; ++jj) {
+            NSValue *v = [NSValue valueWithCGPoint:CGPointMake(
+                    rook_points[i][jj].x / CGFloat(originImage.cols),
+                    rook_points[i][jj].y / CGFloat(originImage.rows))];
+            [points addObject:v];
+        }
+        r.polygonPoints = points;
+        [result addObject:r];
+    }
+    NSArray* rec_out =[[result reverseObjectEnumerator] allObjects];
+    tic.end();
+    std::cout<<"infer time: "<<tic.get_sum_ms()<<"ms"<<std::endl;
+    return rec_out;
+}
+- (NSArray *)readLabelsFromFile:(NSString *)labelFilePath {
+
+    NSString *content = [NSString stringWithContentsOfFile:labelFilePath encoding:NSUTF8StringEncoding error:nil];
+    NSArray *lines = [content componentsSeparatedByCharactersInSet:[NSCharacterSet newlineCharacterSet]];
+    NSMutableArray *ret = [[NSMutableArray alloc] init];
+    for (int i = 0; i < lines.count; ++i) {
+        [ret addObject:@""];
+    }
+    NSUInteger cnt = 0;
+    for (id line in lines) {
+        NSString *l = [(NSString *) line stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
+        if ([l length] == 0)
+            continue;
+        NSArray *segs = [l componentsSeparatedByString:@":"];
+        NSUInteger key;
+        NSString *value;
+        if ([segs count] != 2) {
+            key = cnt;
+            value = [segs[0] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
+        } else {
+            key = [[segs[0] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] integerValue];
+            value = [segs[1] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
+        }
+
+        ret[key] = value;
+        cnt += 1;
+    }
+    return [NSArray arrayWithArray:ret];
+}
+
+- (void)viewDidAppear:(BOOL)animated {
+    [super viewDidAppear:animated];
+    self.boxLayer = [[CALayer alloc] init];
+
+    CGRect r = AVMakeRectWithAspectRatioInsideRect(self.imageView.frame.size, self.imageView.bounds);
+    std::cout<<self.imageView.frame.size.width<<","<<self.imageView.frame.size.height<<std::endl;
+    self.boxLayer.frame = r;
+
+    [self.imageView.layer addSublayer:self.boxLayer];
+
+    NSString *label_file_path = [[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"%@", @"label_list"] ofType:@"txt"];
+
+    self.labels = [self readLabelsFromFile:label_file_path];
+    self.mean = {0.485f, 0.456f, 0.406f};
+    self.scale = {1 / 0.229f, 1 / 0.224f, 1 / 0.225f};
+
+    NSString *model1_path = [[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"%@", @"ch_det_mv3_db_opt"] ofType:@"nb"];
+    NSString *model2_path = [[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"%@", @"ch_rec_mv3_crnn_opt"] ofType:@"nb"];
+    std::string model1_path_str = std::string([model1_path UTF8String]);
+    std::string model2_path_str =  std::string([model2_path UTF8String]);
+    MobileConfig config;
+    config.set_model_from_file(model1_path_str);
+    net_ocr1 = CreatePaddlePredictor<MobileConfig>(config);
+    MobileConfig config2;
+    config2.set_model_from_file(model2_path_str);
+    net_ocr2 = CreatePaddlePredictor<MobileConfig>(config2);
+
+
+    cv::Mat originImage;
+    UIImageToMat(self.image, originImage);
+    NSArray *rec_out = [self ocr_infer:originImage];
+    [_boxLayer.sublayers makeObjectsPerformSelector:@selector(removeFromSuperlayer)];
+    std::cout<<self.imageView.image.size.width<<","<<self.imageView.image.size.height<<std::endl;
+
+    CGFloat h = _boxLayer.frame.size.height;
+    CGFloat w = _boxLayer.frame.size.width;
+    std::ostringstream result2;
+    NSInteger cnt = 0;
+    for (id obj in rec_out) {
+        OcrData *data = obj;
+        BoxLayer *singleBox = [[BoxLayer alloc] init];
+        [singleBox renderOcrPolygon:data withHeight:h withWidth:w withLabel:YES];
+        [_boxLayer addSublayer:singleBox];
+        result2<<[data.label UTF8String] <<","<<data.accuracy<<"\n";
+        cnt += 1;
+    }
+    self.flag_init = true;
+}
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    // Do any additional setup after loading the view, typically from a nib.
+    _flag_process.on = NO;
+    _flag_back_cam.on = NO;
+    _flag_video.on = NO;
+    _flag_cap_photo = false;
+    _image = [UIImage imageNamed:@"ocr.png"];
+    if (_image != nil) {
+        printf("load image successed\n");
+        imageView.image = _image;
+    } else {
+        printf("load image failed\n");
+    }
+
+    [_flag_process addTarget:self action:@selector(PSwitchValueChanged:) forControlEvents:UIControlEventValueChanged];
+    [_flag_back_cam addTarget:self action:@selector(CSwitchValueChanged:) forControlEvents:UIControlEventValueChanged];
+
+    self.videoCamera = [[CvVideoCamera alloc] initWithParentView:self.preView];
+    self.videoCamera.delegate = self;
+    self.videoCamera.defaultAVCaptureDevicePosition = AVCaptureDevicePositionFront;
+    self.videoCamera.defaultAVCaptureSessionPreset = AVCaptureSessionPreset1920x1080;
+    self.videoCamera.defaultAVCaptureVideoOrientation = AVCaptureVideoOrientationPortrait;
+    self.videoCamera.rotateVideo = 90;
+    self.videoCamera.defaultFPS = 30;
+    [self.view insertSubview:self.imageView atIndex:0];
+}
+
+- (IBAction)swith_video_photo:(UISwitch *)sender {
+    NSLog(@"%@", sender.isOn ? @"video ON" : @"video OFF");
+    if (sender.isOn) {
+        self.flag_video.on = YES;
+    } else {
+        self.flag_video.on = NO;
+    }
+}
+
+- (IBAction)cap_photo:(id)sender {
+    if (!self.flag_process.isOn) {
+        self.result.text = @"please turn on the camera firstly";
+    } else {
+        self.flag_cap_photo = true;
+    }
+}
+
+- (void)PSwitchValueChanged:(UISwitch *)sender {
+    NSLog(@"%@", sender.isOn ? @"process ON" : @"process OFF");
+    if (sender.isOn) {
+        [self.videoCamera start];
+    } else {
+        [self.videoCamera stop];
+    }
+}
+
+- (void)CSwitchValueChanged:(UISwitch *)sender {
+    NSLog(@"%@", sender.isOn ? @"back ON" : @"back OFF");
+    if (sender.isOn) {
+        if (self.flag_process.isOn) {
+            [self.videoCamera stop];
+        }
+        self.videoCamera.defaultAVCaptureDevicePosition = AVCaptureDevicePositionBack ;
+        if (self.flag_process.isOn) {
+            [self.videoCamera start];
+        }
+    } else {
+        if (self.flag_process.isOn) {
+            [self.videoCamera stop];
+        }
+        self.videoCamera.defaultAVCaptureDevicePosition = AVCaptureDevicePositionFront;
+        if (self.flag_process.isOn) {
+            [self.videoCamera start];
+        }
+    }
+}
+
+- (void)processImage:(cv::Mat &)image {
+
+    dispatch_async(dispatch_get_main_queue(), ^{
+        if (self.flag_process.isOn) {
+            if (self.flag_init) {
+                if (self.flag_video.isOn || self.flag_cap_photo) {
+                    self.flag_cap_photo = false;
+                    if (image.channels() == 4) {
+                        cvtColor(image, self->_cvimg, CV_RGBA2RGB);
+                    }
+                    auto rec_out =[self ocr_infer:self->_cvimg];
+                    std::ostringstream result;
+                    NSInteger cnt = 0;
+                    [_boxLayer.sublayers makeObjectsPerformSelector:@selector(removeFromSuperlayer)];
+
+                    CGFloat h = _boxLayer.frame.size.height;
+                    CGFloat w = _boxLayer.frame.size.width;
+                    for (id obj in rec_out) {
+                        OcrData *data = obj;
+                        BoxLayer *singleBox = [[BoxLayer alloc] init];
+                        [singleBox renderOcrPolygon:data withHeight:h withWidth:w withLabel:YES];
+                        [_boxLayer addSublayer:singleBox];
+                        result<<[data.label UTF8String] <<","<<data.accuracy<<"\n";
+                        cnt += 1;
+                    }
+                    cvtColor(self->_cvimg, self->_cvimg, CV_RGB2BGR);
+                    self.imageView.image = MatToUIImage(self->_cvimg);
+                }
+            }
+        }
+    });
+}
+
+- (void)didReceiveMemoryWarning {
+    [super didReceiveMemoryWarning];
+    // Dispose of any resources that can be recreated.
+}
+
+@end

deploy/ios_demo/ocr_demo/main.m

+//
+//  main.m
+//  seg_demo
+//
+//  Created by Li,Xiaoyang(SYS) on 2018/11/13.
+//  Copyright © 2018年 Li,Xiaoyang(SYS). All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+#import "AppDelegate.h"
+
+int main(int argc, char * argv[]) {
+    @autoreleasepool {
+        return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
+    }
+}