Just removed double __ from the inclusion guard names.

dlib/image_keypoint/fine_hog_image.h

 // Copyright (C) 2012  Davis E. King (davis@dlib.net)
 // License: Boost Software License   See LICENSE.txt for the full license.
-#ifndef DLIB_FINE_HOG_IMaGE_H__
-#define DLIB_FINE_HOG_IMaGE_H__
+#ifndef DLIB_FINE_HOG_IMaGE_Hh_
+#define DLIB_FINE_HOG_IMaGE_Hh_
 
 #include "fine_hog_image_abstract.h"
 #include "../array2d.h"
@@ -374,5 +374,5 @@ namespace dlib
 
 }
 
-#endif // DLIB_FINE_HOG_IMaGE_H__
+#endif // DLIB_FINE_HOG_IMaGE_Hh_
 

dlib/image_keypoint/fine_hog_image_abstract.h

 // Copyright (C) 2012  Davis E. King (davis@dlib.net)
 // License: Boost Software License   See LICENSE.txt for the full license.
-#undef DLIB_FINE_HOG_IMaGE_ABSTRACT_H__
-#ifdef DLIB_FINE_HOG_IMaGE_ABSTRACT_H__
+#undef DLIB_FINE_HOG_IMaGE_ABSTRACT_Hh_
+#ifdef DLIB_FINE_HOG_IMaGE_ABSTRACT_Hh_
 
 #include "../array2d.h"
 #include "../matrix.h"
@@ -272,5 +272,5 @@ namespace dlib
 
 }
 
-#endif // DLIB_FINE_HOG_IMaGE_ABSTRACT_H__
+#endif // DLIB_FINE_HOG_IMaGE_ABSTRACT_Hh_
 

dlib/image_keypoint/hashed_feature_image.h

 // Copyright (C) 2011  Davis E. King (davis@dlib.net)
 // License: Boost Software License   See LICENSE.txt for the full license.
-#ifndef DLIB_HASHED_IMAGE_FEATUrES_H__
-#define DLIB_HASHED_IMAGE_FEATUrES_H__
+#ifndef DLIB_HASHED_IMAGE_FEATUrES_Hh_
+#define DLIB_HASHED_IMAGE_FEATUrES_Hh_
 
 #include "../lsh/projection_hash.h"
 #include "hashed_feature_image_abstract.h"
@@ -513,6 +513,6 @@ namespace dlib
 
 }
 
-#endif // DLIB_HASHED_IMAGE_FEATUrES_H__
+#endif // DLIB_HASHED_IMAGE_FEATUrES_Hh_
 
 

dlib/image_keypoint/hashed_feature_image_abstract.h

 // Copyright (C) 2011  Davis E. King (davis@dlib.net)
 // License: Boost Software License   See LICENSE.txt for the full license.
-#undef DLIB_HASHED_IMAGE_FEATUrES_ABSTRACT_H__
-#ifdef DLIB_HASHED_IMAGE_FEATUrES_ABSTRACT_H__
+#undef DLIB_HASHED_IMAGE_FEATUrES_ABSTRACT_Hh_
+#ifdef DLIB_HASHED_IMAGE_FEATUrES_ABSTRACT_Hh_
 
 #include "../lsh/projection_hash_abstract.h"
 #include <vector>
@@ -297,7 +297,7 @@ namespace dlib
 
 }
 
-#endif // DLIB_HASHED_IMAGE_FEATUrES_ABSTRACT_H__
+#endif // DLIB_HASHED_IMAGE_FEATUrES_ABSTRACT_Hh_
 
 
 

dlib/image_keypoint/hessian_pyramid.h

 // Copyright (C) 2009  Davis E. King (davis@dlib.net)
 // License: Boost Software License   See LICENSE.txt for the full license.
-#ifndef DLIB_HESSIAN_PYRAMId_H__
-#define DLIB_HESSIAN_PYRAMId_H__
+#ifndef DLIB_HESSIAN_PYRAMId_Hh_
+#define DLIB_HESSIAN_PYRAMId_Hh_
 
 #include "hessian_pyramid_abstract.h"
 #include "../algs.h"
@@ -527,5 +527,5 @@ namespace dlib
 
 }
 
-#endif  // DLIB_HESSIAN_PYRAMId_H__
+#endif  // DLIB_HESSIAN_PYRAMId_Hh_
 

dlib/image_keypoint/hessian_pyramid_abstract.h

 // Copyright (C) 2009  Davis E. King (davis@dlib.net)
 // License: Boost Software License   See LICENSE.txt for the full license.
-#undef DLIB_HESSIAN_PYRAMId_ABSTRACT_H__
-#ifdef DLIB_HESSIAN_PYRAMId_ABSTRACT_H__
+#undef DLIB_HESSIAN_PYRAMId_ABSTRACT_Hh_
+#ifdef DLIB_HESSIAN_PYRAMId_ABSTRACT_Hh_
 
 #include "../image_transforms/integral_image_abstract.h"
 #include "../noncopyable.h"
@@ -240,5 +240,5 @@ namespace dlib
 
 }
 
-#endif  // DLIB_HESSIAN_PYRAMId_ABSTRACT_H__
+#endif  // DLIB_HESSIAN_PYRAMId_ABSTRACT_Hh_
 

dlib/image_keypoint/hog.h

 // Copyright (C) 2010  Davis E. King (davis@dlib.net)
 // License: Boost Software License   See LICENSE.txt for the full license.
-#ifndef DLIB_HoG_H__
-#define DLIB_HoG_H__
+#ifndef DLIB_HoG_Hh_
+#define DLIB_HoG_Hh_
 
 #include "hog_abstract.h"
 #include "../algs.h"
@@ -510,5 +510,5 @@ namespace dlib
 
 }
 
-#endif // DLIB_HoG_H__
+#endif // DLIB_HoG_Hh_
 

dlib/image_keypoint/hog_abstract.h

 // Copyright (C) 2010  Davis E. King (davis@dlib.net)
 // License: Boost Software License   See LICENSE.txt for the full license.
-#undef DLIB_HoG_ABSTRACT_H__
-#ifdef DLIB_HoG_ABSTRACT_H__
+#undef DLIB_HoG_ABSTRACT_Hh_
+#ifdef DLIB_HoG_ABSTRACT_Hh_
 
 #include "../algs.h"
 #include "../matrix.h"
@@ -330,6 +330,6 @@ namespace dlib
 
 }
 
-#endif // DLIB_HoG_ABSTRACT_H__
+#endif // DLIB_HoG_ABSTRACT_Hh_
 
 

dlib/image_keypoint/nearest_neighbor_feature_image.h

 // Copyright (C) 2011  Davis E. King (davis@dlib.net)
 // License: Boost Software License   See LICENSE.txt for the full license.
-#ifndef DLIB_NEAREST_NEIGHBOR_FeATURE_IMAGE_H__
-#define DLIB_NEAREST_NEIGHBOR_FeATURE_IMAGE_H__
+#ifndef DLIB_NEAREST_NEIGHBOR_FeATURE_IMAGE_Hh_
+#define DLIB_NEAREST_NEIGHBOR_FeATURE_IMAGE_Hh_
 
 #include "nearest_neighbor_feature_image_abstract.h"
 #include <vector>
@@ -403,6 +403,6 @@ namespace dlib
 
 }
 
-#endif // DLIB_NEAREST_NEIGHBOR_FeATURE_IMAGE_H__
+#endif // DLIB_NEAREST_NEIGHBOR_FeATURE_IMAGE_Hh_
 
 

dlib/image_keypoint/nearest_neighbor_feature_image_abstract.h

 // Copyright (C) 2011  Davis E. King (davis@dlib.net)
 // License: Boost Software License   See LICENSE.txt for the full license.
-#undef DLIB_NEAREST_NEIGHBOR_FeATURE_IMAGE_ABSTRACT_H__
-#ifdef DLIB_NEAREST_NEIGHBOR_FeATURE_IMAGE_ABSTRACT_H__
+#undef DLIB_NEAREST_NEIGHBOR_FeATURE_IMAGE_ABSTRACT_Hh_
+#ifdef DLIB_NEAREST_NEIGHBOR_FeATURE_IMAGE_ABSTRACT_Hh_
 
 #include <vector>
 #include "../algs.h"
@@ -248,7 +248,7 @@ namespace dlib
 
 }
 
-#endif // DLIB_NEAREST_NEIGHBOR_FeATURE_IMAGE_ABSTRACT_H__
+#endif // DLIB_NEAREST_NEIGHBOR_FeATURE_IMAGE_ABSTRACT_Hh_
 
 
 

dlib/image_keypoint/poly_image.h

 // Copyright (C) 2011  Davis E. King (davis@dlib.net)
 // License: Boost Software License   See LICENSE.txt for the full license.
-#ifndef DLIB_POLY_ImAGE_H__
-#define DLIB_POLY_ImAGE_H__
+#ifndef DLIB_POLY_ImAGE_Hh_
+#define DLIB_POLY_ImAGE_Hh_
 
 #include "poly_image_abstract.h"
 #include "build_separable_poly_filters.h"
@@ -644,6 +644,6 @@ namespace dlib
 
 }
 
-#endif // DLIB_POLY_ImAGE_H__
+#endif // DLIB_POLY_ImAGE_Hh_
 
 

dlib/image_keypoint/poly_image_abstract.h

 // Copyright (C) 2011  Davis E. King (davis@dlib.net)
 // License: Boost Software License   See LICENSE.txt for the full license.
-#undef DLIB_POLY_ImAGE_ABSTRACT_H__
-#ifdef DLIB_POLY_ImAGE_ABSTRACT_H__
+#undef DLIB_POLY_ImAGE_ABSTRACT_Hh_
+#ifdef DLIB_POLY_ImAGE_ABSTRACT_Hh_
 
 #include "../algs.h"
 #include "../matrix.h"
@@ -329,6 +329,6 @@ namespace dlib
 
 }
 
-#endif // DLIB_POLY_ImAGE_ABSTRACT_H__
+#endif // DLIB_POLY_ImAGE_ABSTRACT_Hh_
 
 

dlib/image_loader/load_image.h

 // Copyright (C) 2011  Davis E. King (davis@dlib.net), Nils Labugt
 // License: Boost Software License   See LICENSE.txt for the full license.
-#ifndef DLIB_LOAd_IMAGE_H__
-#define DLIB_LOAd_IMAGE_H__
+#ifndef DLIB_LOAd_IMAGE_Hh_
+#define DLIB_LOAd_IMAGE_Hh_
 
 #include "load_image_abstract.h"
 #include "../string.h"
@@ -43,5 +43,5 @@ namespace dlib
 
 }
 
-#endif // DLIB_LOAd_IMAGE_H__ 
+#endif // DLIB_LOAd_IMAGE_Hh_ 
 

dlib/image_processing.h

 // Copyright (C) 2011  Davis E. King (davis@dlib.net)
 // License: Boost Software License   See LICENSE.txt for the full license.
-#ifndef DLIB_IMAGE_PROCESSInG_H___
-#define DLIB_IMAGE_PROCESSInG_H___ 
+#ifndef DLIB_IMAGE_PROCESSInG_H_h_
+#define DLIB_IMAGE_PROCESSInG_H_h_ 
 
 #include "image_processing/scan_image.h"
 #include "image_processing/scan_image_pyramid.h"
@@ -15,6 +15,6 @@
 #include "image_processing/remove_unobtainable_rectangles.h"
 #include "image_processing/scan_fhog_pyramid.h"
 
-#endif // DLIB_IMAGE_PROCESSInG_H___
+#endif // DLIB_IMAGE_PROCESSInG_H_h_
 
 

dlib/image_processing/box_overlap_testing.h

 // Copyright (C) 2011  Davis E. King (davis@dlib.net)
 // License: Boost Software License   See LICENSE.txt for the full license.
-#ifndef DLIB_BOX_OVERlAP_TESTING_H__
-#define DLIB_BOX_OVERlAP_TESTING_H__
+#ifndef DLIB_BOX_OVERlAP_TESTING_Hh_
+#define DLIB_BOX_OVERlAP_TESTING_Hh_
 
 #include "box_overlap_testing_abstract.h"
 #include "../geometry.h"
@@ -164,5 +164,5 @@ namespace dlib
 
 }
 
-#endif // DLIB_BOX_OVERlAP_TESTING_H__
+#endif // DLIB_BOX_OVERlAP_TESTING_Hh_
 

dlib/image_processing/box_overlap_testing_abstract.h

 // Copyright (C) 2011  Davis E. King (davis@dlib.net)
 // License: Boost Software License   See LICENSE.txt for the full license.
-#undef DLIB_BOX_OVERlAP_TESTING_ABSTRACT_H__
-#ifdef DLIB_BOX_OVERlAP_TESTING_ABSTRACT_H__
+#undef DLIB_BOX_OVERlAP_TESTING_ABSTRACT_Hh_
+#ifdef DLIB_BOX_OVERlAP_TESTING_ABSTRACT_Hh_
 
 #include "../geometry.h"
 
@@ -145,6 +145,6 @@ namespace dlib
 
 }
 
-#endif // DLIB_BOX_OVERlAP_TESTING_ABSTRACT_H__
+#endif // DLIB_BOX_OVERlAP_TESTING_ABSTRACT_Hh_
 
 

dlib/image_processing/detection_template_tools.h

 // Copyright (C) 2011  Davis E. King (davis@dlib.net)
 // License: Boost Software License   See LICENSE.txt for the full license.
-#ifndef DLIB_DETECTION_TEMPlATE_TOOLS_H__
-#define DLIB_DETECTION_TEMPlATE_TOOLS_H__
+#ifndef DLIB_DETECTION_TEMPlATE_TOOLS_Hh_
+#define DLIB_DETECTION_TEMPlATE_TOOLS_Hh_
 
 #include "detection_template_tools_abstract.h"
 #include "../geometry.h"
@@ -108,6 +108,6 @@ namespace dlib
 }
 
 
-#endif // DLIB_DETECTION_TEMPlATE_TOOLS_H__
+#endif // DLIB_DETECTION_TEMPlATE_TOOLS_Hh_
 
 

dlib/image_processing/detection_template_tools_abstract.h

 // Copyright (C) 2011  Davis E. King (davis@dlib.net)
 // License: Boost Software License   See LICENSE.txt for the full license.
-#undef DLIB_DETECTION_TEMPlATE_TOOLS_ABSTRACT_H__
-#ifdef DLIB_DETECTION_TEMPlATE_TOOLS_ABSTRACT_H__
+#undef DLIB_DETECTION_TEMPlATE_TOOLS_ABSTRACT_Hh_
+#ifdef DLIB_DETECTION_TEMPlATE_TOOLS_ABSTRACT_Hh_
 
 #include "../geometry.h"
 #include <utility>
@@ -89,7 +89,7 @@ namespace dlib
 }
 
 
-#endif // DLIB_DETECTION_TEMPlATE_TOOLS_ABSTRACT_H__
+#endif // DLIB_DETECTION_TEMPlATE_TOOLS_ABSTRACT_Hh_
 
 
 

dlib/image_processing/frontal_face_detector.h

 // Copyright (C) 2013  Davis E. King (davis@dlib.net)
 // License: Boost Software License   See LICENSE.txt for the full license.
-#ifndef DLIB_FRONTAL_FACE_DETECTOr_H__
-#define DLIB_FRONTAL_FACE_DETECTOr_H__
+#ifndef DLIB_FRONTAL_FACE_DETECTOr_Hh_
+#define DLIB_FRONTAL_FACE_DETECTOr_Hh_
 
 #include "frontal_face_detector_abstract.h"
 #include "../image_processing.h"
@@ -2368,5 +2368,5 @@ namespace dlib
 
 }
 
-#endif // DLIB_FRONTAL_FACE_DETECTOr_H__
+#endif // DLIB_FRONTAL_FACE_DETECTOr_Hh_
 

dlib/image_processing/frontal_face_detector_abstract.h

 // Copyright (C) 2013  Davis E. King (davis@dlib.net)
 // License: Boost Software License   See LICENSE.txt for the full license.
-#undef DLIB_FRONTAL_FACE_DETECTOr_ABSTRACT_H__
-#ifdef DLIB_FRONTAL_FACE_DETECTOr_ABSTRACT_H__
+#undef DLIB_FRONTAL_FACE_DETECTOr_ABSTRACT_Hh_
+#ifdef DLIB_FRONTAL_FACE_DETECTOr_ABSTRACT_Hh_
 
 #include "object_detector_abstract.h"
 #include "scan_fhog_pyramid_abstract.h"
@@ -21,5 +21,5 @@ namespace dlib
 
 }
 
-#endif // DLIB_FRONTAL_FACE_DETECTOr_ABSTRACT_H__
+#endif // DLIB_FRONTAL_FACE_DETECTOr_ABSTRACT_Hh_