Added map_det_to_chip()

dlib/image_transforms/interpolation.h

@@ -1508,6 +1508,28 @@ namespace dlib
         return find_similarity_transform(from, to);
     }
 
+// ----------------------------------------------------------------------------------------
+
+    inline full_object_detection map_det_to_chip(
+        const full_object_detection& det,
+        const chip_details& details
+    )
+    {
+        point_transform_affine tform = get_mapping_to_chip(details);
+        full_object_detection res(det);
+        // map the parts
+        for (unsigned long l = 0; l < det.num_parts(); ++l)
+            res.part(l) = tform(det.part(l));
+        // map the main rectangle
+        rectangle rect;
+        rect += tform(det.get_rect().tl_corner());
+        rect += tform(det.get_rect().tr_corner());
+        rect += tform(det.get_rect().bl_corner());
+        rect += tform(det.get_rect().br_corner());
+        res.get_rect() = rect;
+        return res;
+    }
+
 // ----------------------------------------------------------------------------------------
 
     template <

dlib/image_transforms/interpolation_abstract.h

@@ -1039,6 +1039,24 @@ namespace dlib
               to the pixels in the cropped image defined by the given details object.
     !*/
 
+// ----------------------------------------------------------------------------------------
+
+    full_object_detection map_det_to_chip (
+        const full_object_detection& det,
+        const chip_details& details
+    );
+    /*!
+        ensures
+            - Maps the given detection into the pixel space of the image chip defined by
+              the given details object.  That is, this function returns an object D such
+              that:
+                - D.get_rect() == a box that bounds the same thing in the image chip as
+                  det.get_rect() bounds in the original image the chip is extracted from.
+                - for all valid i:
+                    - D.part(i) == the location in the image chip corresponding to
+                      det.part(i) in the original image.
+    !*/
+
 // ----------------------------------------------------------------------------------------
 
     template <