Fix: Restore MATLAB Module Compilation for OpenCV 4.x

modules/matlab/CMakeLists.txt

@@ -113,6 +113,8 @@ ocv_add_module(matlab   BINDINGS
                                  opencv_calib opencv_calib3d
                                  opencv_stitching opencv_superres
                                  opencv_xfeatures2d
+				 opencv_optflow
+				 opencv_xphoto
 )
 
 # get the commit information
@@ -156,6 +158,8 @@ endforeach()
 # add extra headers by hand
 list(APPEND opencv_extra_hdrs "core=${OPENCV_MODULE_opencv_core_LOCATION}/include/opencv2/core/base.hpp")
 list(APPEND opencv_extra_hdrs "video=${OPENCV_MODULE_opencv_video_LOCATION}/include/opencv2/video/tracking.hpp")
+list(APPEND opencv_extra_hdrs "optflow=${OPENCV_MODULE_opencv_optflow_LOCATION}/include/opencv2/optflow.hpp")
+
 
 # pass the OPENCV_CXX_EXTRA_FLAGS through to the mex compiler
 # remove the visibility modifiers, so the mex gateway is visible

modules/matlab/generator/parse_tree.py

@@ -1,4 +1,10 @@
-import collections
+import sys
+if sys.version_info >= (3, 10):
+    import collections.abc
+    IterableType = collections.abc.Iterable
+else:
+    import collections
+    IterableType = collections.Iterable
 from textwrap import fill
 from filters import *
 try:
@@ -371,7 +377,7 @@ def todict(obj):
         return obj
     elif isinstance(obj, dict):
         return dict((key, todict(val)) for key, val in obj.items())
-    elif isinstance(obj, collections.Iterable):
+    elif isinstance(obj, IterableType):
         return [todict(val) for val in obj]
     elif hasattr(obj, '__dict__'):
         return todict(vars(obj))

modules/matlab/include/opencv2/matlab/bridge.hpp

@@ -55,6 +55,21 @@
 #include <opencv2/photo.hpp>
 #include <opencv2/stitching.hpp>
 #include <opencv2/video.hpp>
+#include <opencv2/optflow.hpp>
+#include <opencv2/xphoto.hpp>
+
+/* This 'using' line was added in order to fix the following Error.
+ * Failed to compile currentUIFramework:
+ * modules/matlab/src/currentUIFramework.cpp:
+ * In function void mexFunction(int, mxArray**, int, const mxArray**)
+ * error: string was not declared in this scope
+ * string retval; in line 41
+ *
+ * This error happens at the last stage of opencv build, when compiling the mex bindings
+ * TODO: This is NOT the optimal fix, and needs to be addressed
+ */
+using std::string;
+
 
 namespace cv {
 namespace bridge {
@@ -85,17 +100,21 @@ typedef cv::Ptr<AlignMTB> Ptr_AlignMTB;
 typedef cv::Ptr<CalibrateDebevec> Ptr_CalibrateDebevec;
 typedef cv::Ptr<CalibrateRobertson> Ptr_CalibrateRobertson;
 typedef cv::Ptr<DenseOpticalFlow> Ptr_DenseOpticalFlow;
-typedef cv::Ptr<DualTVL1OpticalFlow> Ptr_DualTVL1OpticalFlow;
+typedef cv::Ptr<cv::optflow::DualTVL1OpticalFlow> Ptr_DualTVL1OpticalFlow;
 typedef cv::Ptr<MergeDebevec> Ptr_MergeDebevec;
 typedef cv::Ptr<MergeMertens> Ptr_MergeMertens;
 typedef cv::Ptr<MergeRobertson> Ptr_MergeRobertson;
 typedef cv::Ptr<Stitcher> Ptr_Stitcher;
 typedef cv::Ptr<Tonemap> Ptr_Tonemap;
 typedef cv::Ptr<TonemapDrago> Ptr_TonemapDrago;
-typedef cv::Ptr<TonemapDurand> Ptr_TonemapDurand;
+typedef cv::Ptr<cv::xphoto::TonemapDurand> Ptr_TonemapDurand;
 typedef cv::Ptr<TonemapMantiuk> Ptr_TonemapMantiuk;
 typedef cv::Ptr<TonemapReinhard> Ptr_TonemapReinhard;
 typedef cv::Ptr<float> Ptr_float;
+typedef cv::Ptr<cv::GeneralizedHoughBallard> Ptr_GeneralizedHoughBallard;
+typedef cv::Ptr<cv::GeneralizedHoughGuil> Ptr_GeneralizedHoughGuil;
+
+
 
 // ----------------------------------------------------------------------------
 //                          PREDECLARATIONS
@@ -527,6 +546,15 @@ class Bridge {
   Bridge& operator=(const Ptr_float& ) { return *this; }
   Ptr_float toPtrFloat() { return Ptr_float(); }
   operator Ptr_float() { return toPtrFloat(); }
+
+  // ---------------------------   Ptr_GeneralizedHoughBallard   --------------
+  Bridge& operator=(const Ptr_GeneralizedHoughBallard& obj) { return *this; }
+  operator Ptr_GeneralizedHoughBallard() { return Ptr_GeneralizedHoughBallard(); }
+
+  // ---------------------------   Ptr_GeneralizedHoughGuil   ----------------------
+  Bridge& operator=(const Ptr_GeneralizedHoughGuil& obj) { return *this; }
+  operator Ptr_GeneralizedHoughGuil() { return Ptr_GeneralizedHoughGuil(); }
+
 }; // class Bridge