fixed several documentation errors

modules/core/doc/dynamic_structures.rst

@@ -588,11 +588,11 @@ GetSetElem
 ----------
 Finds a set element by its index.
 
-.. ocv:cfunction:: CvSetElem* cvGetSetElem( const CvSet* set_header, int index )
+.. ocv:cfunction:: CvSetElem* cvGetSetElem( const CvSet* set_header, int idx )
 
     :param set_header: Set
 
-    :param index: Index of the set element within a sequence
+    :param idx: Index of the set element within a sequence
 
 The function finds a set element by its index. The function returns the pointer to it or 0 if the index is invalid or the corresponding node is free. The function supports negative indices as it uses
 :ocv:cfunc:`GetSeqElem`

modules/core/doc/xml_yaml_persistence.rst

@@ -167,7 +167,7 @@ The constructors.
         * **FileStorage::WRITE** Open the file for writing.
 
         * **FileStorage::APPEND** Open the file for appending.
-        
+
         * **FileStorage::MEMORY** Read data from ``source`` or write data to the internal buffer (which is returned by ``FileStorage::release``)
 
     :param encoding: Encoding of the file. Note that UTF-16 XML encoding is not supported currently and you should use 8-bit encoding instead of it.
@@ -199,7 +199,7 @@ FileStorage::release
 --------------------
 Closes the file and releases all the memory buffers.
 
-.. ocv:function:: string FileStorage::release()
+.. ocv:function:: void FileStorage::release()
 
 Call this method after all I/O operations with the storage are finished. If the storage was opened for writing data and ``FileStorage::WRITE`` was specified
 

modules/features2d/doc/feature_detection_and_description.rst

@@ -94,9 +94,9 @@ Finds keypoints in an image and computes their descriptors
 
     :param useProvidedKeypoints: If it is true, then the method will use the provided vector of keypoints instead of detecting them.
 
-    FREAK
+FREAK
 -----
-.. ocv:class:: FREAK
+.. ocv:class:: FREAK : public DescriptorExtractor
 
 Class implementing the FREAK (*Fast Retina Keypoint*) keypoint descriptor, described in [AOV12]_. The algorithm propose a novel keypoint descriptor inspired by the human visual system and more precisely the retina, coined Fast Retina Key- point (FREAK). A cascade of binary strings is computed by efficiently comparing image intensities over a retinal sampling pattern. FREAKs are in general faster to compute with lower memory load and also more robust than SIFT, SURF or BRISK. They are competitive alternatives to existing keypoints in particular for embedded applications.
 
@@ -106,12 +106,12 @@ FREAK::FREAK
 ------------
 The FREAK constructor
 
-.. ocv:function:: FREAK::FREAK(bool orientationNormalized = true, bool scaleNormalized = true, float patternScale = 22.0f, int nbOctave = 4, const vector<int>& selectedPairs = vector<int>())
+.. ocv:function:: FREAK::FREAK( bool orientationNormalized=true, bool scaleNormalized=true, float patternScale=22.0f, int nOctaves=4, const vector<int>& selectedPairs=vector<int>() )
 
     :param orientationNormalized: Enable orientation normalization.
     :param scaleNormalized: Enable scale normalization.
     :param patternScale: Scaling of the description pattern.
-    :param nbOctave: Number of octaves covered by the detected keypoints.
+    :param nOctaves: Number of octaves covered by the detected keypoints.
     :param selectedPairs: (Optional) user defined selected pairs indexes,
 
 FREAK::selectPairs
@@ -126,4 +126,3 @@ We notice that for keypoint matching applications, image content has little effe
     :param keypoints: Set of detected keypoints
     :param corrThresh: Correlation threshold.
     :param verbose: Prints pair selection informations.
-        
\ No newline at end of file

modules/gpu/doc/video.rst

@@ -324,9 +324,9 @@ Class used for background/foreground segmentation. ::
         std::vector< std::vector<cv::Point> > foreground_regions;
     };
 
-The class discriminates between foreground and background pixels by building and maintaining a model of the background. Any pixel which does not fit this model is then deemed to be foreground. The class implements algorithm described in [FGD2003]_.
+  The class discriminates between foreground and background pixels by building and maintaining a model of the background. Any pixel which does not fit this model is then deemed to be foreground. The class implements algorithm described in [FGD2003]_.
 
-The results are available through the class fields:
+  The results are available through the class fields:
 
     .. ocv:member:: cv::gpu::GpuMat background
 
@@ -383,7 +383,7 @@ gpu::FGDStatModel::update
 --------------------------
 Updates the background model and returns foreground regions count.
 
-.. ocv:function:: int gpu::FGDStatModel::update(const cv::gpu::GpuMat& curFrame);
+.. ocv:function:: int gpu::FGDStatModel::update(const cv::gpu::GpuMat& curFrame)
 
     :param curFrame: Next video frame.
 
@@ -615,7 +615,7 @@ Class for reading video from files.
 gpu::VideoReader_GPU::Codec
 ---------------------------
 
-Video codecs supported by ocv:class:`gpu::VideoReader_GPU` . ::
+Video codecs supported by :ocv:class:`gpu::VideoReader_GPU` . ::
 
     enum Codec
     {
@@ -640,7 +640,7 @@ Video codecs supported by ocv:class:`gpu::VideoReader_GPU` . ::
 gpu::VideoReader_GPU::ChromaFormat
 ----------------------------------
 
-Chroma formats supported by ocv:class:`gpu::VideoReader_GPU` . ::
+Chroma formats supported by :ocv:class:`gpu::VideoReader_GPU` . ::
 
     enum ChromaFormat
     {
@@ -783,7 +783,7 @@ Starts processing.
 
 .. ocv:function:: virtual void gpu::VideoReader_GPU::VideoSource::start() = 0
 
-Implementation must create own thread with video processing and call periodic ocv:func:`gpu::VideoReader_GPU::VideoSource::parseVideoData` .
+Implementation must create own thread with video processing and call periodic :ocv:func:`gpu::VideoReader_GPU::VideoSource::parseVideoData` .