Made dependency of opencv_objdetect from opencv_highgui optional.

modules/objdetect/CMakeLists.txt

 set(the_description "Object Detection")
-ocv_define_module(objdetect opencv_highgui opencv_calib3d)
+ocv_define_module(objdetect opencv_calib3d OPTIONAL opencv_highgui)

modules/objdetect/src/latentsvm.cpp

@@ -388,7 +388,9 @@ int showRootFilterBoxes(IplImage *image,
         cvRectangle(image, points[i], oppositePoint, 
                     color, thickness, line_type, shift);
     }
+#ifdef HAVE_OPENCV_HIGHGUI
     cvShowImage("Initial image", image);
+#endif
     return LATENT_SVM_OK;
 }
 
@@ -442,7 +444,9 @@ int showPartFilterBoxes(IplImage *image,
                         color, thickness, line_type, shift);
         }
     }
+#ifdef HAVE_OPENCV_HIGHGUI
     cvShowImage("Initial image", image);
+#endif
     return LATENT_SVM_OK;
 }
 
@@ -476,7 +480,9 @@ int showBoxes(IplImage *img,
         cvRectangle(img, points[i], oppositePoints[i], 
                     color, thickness, line_type, shift);
     }
+#ifdef HAVE_OPENCV_HIGHGUI
     cvShowImage("Initial image", img);
+#endif
     return LATENT_SVM_OK;
 }
 

modules/objdetect/src/latentsvmdetector.cpp

@@ -97,7 +97,9 @@ CvSeq* cvLatentSvmDetectObjects(IplImage* image,
     CvSeq* result_seq = 0;
     int error = 0;
 
-    cvConvertImage(image, image, CV_CVTIMG_SWAP_RB);
+    if(image->nChannels == 3)
+        cvCvtColor(image, image, CV_BGR2RGB);
+
     // Getting maximum filter dimensions
     getMaxFilterDims((const CvLSVMFilterObject**)(detector->filters), detector->num_components,
                      detector->num_part_filters, &maxXBorder, &maxYBorder);
@@ -132,7 +134,9 @@ CvSeq* cvLatentSvmDetectObjects(IplImage* image,
         detection.rect = bounding_box;
         cvSeqPush(result_seq, &detection);
     }
-    cvConvertImage(image, image, CV_CVTIMG_SWAP_RB);
+
+    if(image->nChannels == 3)
+        cvCvtColor(image, image, CV_RGB2BGR);
 
     freeFeaturePyramidObject(&H);
     free(points);

modules/objdetect/src/precomp.hpp

@@ -55,11 +55,15 @@
 #include "opencv2/imgproc/imgproc.hpp"
 #include "opencv2/imgproc/imgproc_c.h"
 #include "opencv2/core/core_c.h"
-#include "opencv2/highgui/highgui.hpp"
 #include "opencv2/core/internal.hpp"
 #include "opencv2/features2d/features2d.hpp"
 #include "opencv2/calib3d/calib3d.hpp"
 
+#include "opencv2/opencv_modules.hpp"
+#ifdef HAVE_OPENCV_HIGHGUI
+#  include "opencv2/highgui/highgui.hpp"
+#endif
+
 #ifdef HAVE_TEGRA_OPTIMIZATION
 #include "opencv2/objdetect/objdetect_tegra.hpp"
 #endif