Merge pull request #19162 from alalek:backport_18985

doc/js_tutorials/js_setup/js_setup/js_setup.markdown

@@ -131,6 +131,13 @@ Building OpenCV.js from Source
     emcmake python ./opencv/platforms/js/build_js.py build_js --build_test
     @endcode
 
+-#  [optional] To enable OpenCV contrib modules append `--cmake_option="-DOPENCV_EXTRA_MODULES_PATH=/path/to/opencv_contrib/modules/"`
+
+    For example:
+    @code{.bash}
+    python ./platforms/js/build_js.py build_js --cmake_option="-DOPENCV_EXTRA_MODULES_PATH=opencv_contrib/modules"
+    @endcode
+
 Running OpenCV.js Tests
 ---------------------------------------
 

modules/js/generator/embindgen.py

@@ -634,8 +634,10 @@ class JSWrapperGenerator(object):
                     ret_type = type_dict[ptr_type]
             for key in type_dict:
                 if key in ret_type:
-                    ret_type = ret_type.replace(key, type_dict[key])
-
+                    # Replace types. Instead of ret_type.replace we use regular
+                    # expression to exclude false matches.
+                    # See https://github.com/opencv/opencv/issues/15514
+                    ret_type = re.sub('(^|[^\w])' + key + '($|[^\w])', type_dict[key], ret_type)
             if variant.constret and ret_type.startswith('const') == False:
                 ret_type = 'const ' + ret_type
             if variant.refret and ret_type.endswith('&') == False:

platforms/js/opencv_js.config.py

@@ -47,6 +47,8 @@ features2d = {'Feature2D': ['detect', 'compute', 'detectAndCompute', 'descriptor
               'BFMatcher': ['isMaskSupported', 'create'],
               '': ['drawKeypoints', 'drawMatches', 'drawMatchesKnn']}
 
-calib3d = {'': ['findHomography', 'estimateAffine2D', 'Rodrigues']}
+calib3d = {'': ['findHomography', 'calibrateCameraExtended', 'drawFrameAxes', 'estimateAffine2D', \
+                'getDefaultNewCameraMatrix', 'initUndistortRectifyMap', 'Rodrigues', \
+                'solvePnP', 'solvePnPRansac', 'solvePnPRefineLM']}
 
 white_list = makeWhiteList([core, imgproc, objdetect, video, dnn, features2d, calib3d])