2 =============================
10 .. ocv:function:: void ocl::cornerHarris(const oclMat &src, oclMat &dst, int blockSize, int ksize, double k, int bordertype = cv::BORDER_DEFAULT)
12 :param src: Source image. Only CV_8UC1 and CV_32FC1 images are supported now.
14 :param dst: Destination image containing cornerness values. It has the same size as src and CV_32FC1 type.
16 :param blockSize: Neighborhood size
18 :param ksize: Aperture parameter for the Sobel operator
20 :param k: Harris detector free parameter
22 :param bordertype: Pixel extrapolation method. Only BORDER_REFLECT101, BORDER_REFLECT, BORDER_CONSTANT and BORDER_REPLICATE are supported now.
24 Calculate Harris corner.
26 ocl::cornerMinEigenVal
27 ------------------------
30 .. ocv:function:: void ocl::cornerMinEigenVal(const oclMat &src, oclMat &dst, int blockSize, int ksize, int bordertype = cv::BORDER_DEFAULT)
32 :param src: Source image. Only CV_8UC1 and CV_32FC1 images are supported now.
34 :param dst: Destination image containing cornerness values. It has the same size as src and CV_32FC1 type.
36 :param blockSize: Neighborhood size
38 :param ksize: Aperture parameter for the Sobel operator
40 :param bordertype: Pixel extrapolation method. Only BORDER_REFLECT101, BORDER_REFLECT, BORDER_CONSTANT and BORDER_REPLICATE are supported now.
42 Calculate MinEigenVal.
48 .. ocv:function:: void ocl::calcHist(const oclMat &mat_src, oclMat &mat_hist)
50 :param src: Source arrays. They all should have the same depth, CV 8U, and the same size. Each of them can have an arbitrary number of channels.
52 :param dst: The output histogram, a dense or sparse dims-dimensional
54 Calculates histogram of one or more arrays. Supports only 8UC1 data type.
60 .. ocv:function:: void ocl::remap(const oclMat &src, oclMat &dst, oclMat &map1, oclMat &map2, int interpolation, int bordertype, const Scalar &value = Scalar())
62 :param src: Source image. Only CV_8UC1 and CV_32FC1 images are supported now.
64 :param dst: Destination image containing cornerness values. It has the same size as src and CV_32FC1 type.
66 :param map1: The first map of either (x,y) points or just x values having the type CV_16SC2 , CV_32FC1 , or CV_32FC2 . See covertMaps() for details on converting a floating point representation to fixed-point for speed.
68 :param map2: The second map of y values having the type CV_32FC1 , or none (empty map if map1 is (x,y) points), respectively.
70 :param interpolation: The interpolation method
72 :param bordertype: Pixel extrapolation method. Only BORDER_CONSTANT are supported now.
74 :param value: The border value if borderType==BORDER CONSTANT
76 The function remap transforms the source image using the specified map: dst (x ,y) = src (map1(x , y) , map2(x , y)) where values of pixels with non-integer coordinates are computed using one of available interpolation methods. map1 and map2 can be encoded as separate floating-point maps in map1 and map2 respectively, or interleaved floating-point maps of (x,y) in map1. Supports CV_8UC1, CV_8UC3, CV_8UC4, CV_32FC1 , CV_32FC3 and CV_32FC4 data types.
82 .. ocv:function:: void ocl::resize(const oclMat &src, oclMat &dst, Size dsize, double fx = 0, double fy = 0, int interpolation = INTER_LINEAR)
84 :param src: Source image.
86 :param dst: Destination image.
88 :param dsize: he destination image size. If it is zero, then it is computed as: dsize = Size(round(fx*src.cols), round(fy*src.rows)). Either dsize or both fx or fy must be non-zero.
90 :param fx: The scale factor along the horizontal axis. When 0, it is computed as (double)dsize.width/src.cols
92 :param fy: The scale factor along the vertical axis. When 0, it is computed as (double)dsize.height/src.rows
94 :param interpolation: The interpolation method: INTER NEAREST or INTER LINEAR
96 Resizes an image. Supports CV_8UC1, CV_8UC3, CV_8UC4, CV_32FC1 , CV_32FC3 and CV_32FC4 data types.
102 .. ocv:function:: void ocl::warpAffine(const oclMat &src, oclMat &dst, const Mat &M, Size dsize, int flags = INTER_LINEAR)
104 :param src: Source image.
106 :param dst: Destination image.
108 :param M: 2times 3 transformation matrix
110 :param dsize: Size of the destination image
112 :param flags: A combination of interpolation methods, see cv::resize, and the optional flag WARP INVERSE MAP that means that M is the inverse transformation (dst to $src)
114 The function warpAffine transforms the source image using the specified matrix. Supports INTER_NEAREST, INTER_LINEAR, INTER_CUBIC types.
117 ---------------------
120 .. ocv:function:: void ocl::warpPerspective(const oclMat &src, oclMat &dst, const Mat &M, Size dsize, int flags = INTER_LINEAR)
122 :param src: Source image.
124 :param dst: Destination image.
126 :param M: 2times 3 transformation matrix
128 :param dsize: Size of the destination image
130 :param flags: A combination of interpolation methods, see cv::resize, and the optional flag WARP INVERSE MAP that means that M is the inverse transformation (dst to $src)
132 Applies a perspective transformation to an image. Supports INTER_NEAREST, INTER_LINEAR, INTER_CUBIC types.
138 .. ocv:function:: void ocl::cvtColor(const oclMat &src, oclMat &dst, int code , int dcn = 0)
140 :param src: Source image.
142 :param dst: Destination image.
144 :param code:The color space conversion code
146 :param dcn: The number of channels in the destination image; if the parameter is 0, the number of the channels will be derived automatically from src and the code
148 Converts image from one color space to another.For now, only RGB2GRAY is supportted. Supports.CV_8UC1,CV_8UC4,CV_32SC1,CV_32SC4,CV_32FC1,CV_32FC4
152 Returns Threshold value
154 .. ocv:function:: double ocl::threshold(const oclMat &src, oclMat &dst, double thresh, double maxVal, int type = THRESH_TRUNC)
156 :param src: The source array
158 :param dst: Destination array; will have the same size and the same type as src
160 :param thresh: Threshold value
162 :param maxVal: Maximum value to use with THRESH BINARY and THRESH BINARY INV thresholding types
164 :param type: Thresholding type
166 The function applies fixed-level thresholding to a single-channel array. The function is typically used to get a bi-level (binary) image out of a grayscale image or for removing a noise, i.e. filtering out pixels with too small or too large values. There are several types of thresholding that the function supports that are determined by thresholdType. Supports only CV_32FC1 and CV_8UC1 data type.
168 ocl::buildWarpPlaneMaps
169 -----------------------
170 Builds plane warping maps.
172 .. ocv:function:: void ocl::buildWarpPlaneMaps( Size src_size, Rect dst_roi, const Mat& K, const Mat& R, const Mat& T, float scale, oclMat& map_x, oclMat& map_y )
176 ocl::buildWarpCylindricalMaps
177 -----------------------------
178 Builds cylindrical warping maps.
180 .. ocv:function:: void ocl::buildWarpCylindricalMaps( Size src_size, Rect dst_roi, const Mat& K, const Mat& R, float scale, oclMat& map_x, oclMat& map_y )
185 ocl::buildWarpSphericalMaps
186 ---------------------------
187 Builds spherical warping maps.
189 .. ocv:function:: void ocl::buildWarpSphericalMaps( Size src_size, Rect dst_roi, const Mat& K, const Mat& R, float scale, oclMat& map_x, oclMat& map_y )
192 ocl::buildWarpPerspectiveMaps
193 -----------------------------
194 Builds transformation maps for perspective transformation.
196 .. ocv:function:: void ocl::buildWarpAffineMaps(const Mat& M, bool inverse, Size dsize, oclMat& xmap, oclMat& ymap)
198 :param M: *3x3* transformation matrix.
200 :param inverse: Flag specifying that ``M`` is an inverse transformation ( ``dst=>src`` ).
202 :param dsize: Size of the destination image.
204 :param xmap: X values with ``CV_32FC1`` type.
206 :param ymap: Y values with ``CV_32FC1`` type.
208 .. seealso:: :ocv:func:`ocl::warpPerspective` , :ocv:func:`ocl::remap`
211 ocl::buildWarpAffineMaps
212 ------------------------
213 Builds transformation maps for affine transformation.
215 .. ocv:function:: void ocl::buildWarpAffineMaps(const Mat& M, bool inverse, Size dsize, oclMat& xmap, oclMat& ymap)
217 :param M: *2x3* transformation matrix.
219 :param inverse: Flag specifying that ``M`` is an inverse transformation ( ``dst=>src`` ).
221 :param dsize: Size of the destination image.
223 :param xmap: X values with ``CV_32FC1`` type.
225 :param ymap: Y values with ``CV_32FC1`` type.
227 .. seealso:: :ocv:func:`ocl::warpAffine` , :ocv:func:`ocl::remap`
229 ocl::PyrLKOpticalFlow
230 ---------------------
231 .. ocv:class:: ocl::PyrLKOpticalFlow
233 Class used for calculating an optical flow. ::
235 class PyrLKOpticalFlow
240 void sparse(const oclMat& prevImg, const oclMat& nextImg, const oclMat& prevPts, oclMat& nextPts,
241 oclMat& status, oclMat* err = 0);
243 void dense(const oclMat& prevImg, const oclMat& nextImg, oclMat& u, oclMat& v, oclMat* err = 0);
250 float minEigThreshold;
251 bool getMinEigenVals;
253 void releaseMemory();
256 The class can calculate an optical flow for a sparse feature set or dense optical flow using the iterative Lucas-Kanade method with pyramids.
258 .. seealso:: :ocv:func:`calcOpticalFlowPyrLK`
262 (Ocl) An example the Lucas Kanade optical flow pyramid method can be found at opencv_source_code/samples/ocl/pyrlk_optical_flow.cpp
263 (Ocl) An example for square detection can be found at opencv_source_code/samples/ocl/squares.cpp
265 ocl::PyrLKOpticalFlow::sparse
266 -----------------------------
267 Calculate an optical flow for a sparse feature set.
269 .. ocv:function:: void ocl::PyrLKOpticalFlow::sparse(const oclMat& prevImg, const oclMat& nextImg, const oclMat& prevPts, oclMat& nextPts, oclMat& status, oclMat* err = 0)
271 :param prevImg: First 8-bit input image (supports both grayscale and color images).
273 :param nextImg: Second input image of the same size and the same type as ``prevImg`` .
275 :param prevPts: Vector of 2D points for which the flow needs to be found. It must be one row matrix with CV_32FC2 type.
277 :param nextPts: Output vector of 2D points (with single-precision floating-point coordinates) containing the calculated new positions of input features in the second image. When ``useInitialFlow`` is true, the vector must have the same size as in the input.
279 :param status: Output status vector (CV_8UC1 type). Each element of the vector is set to 1 if the flow for the corresponding features has been found. Otherwise, it is set to 0.
281 :param err: Output vector (CV_32FC1 type) that contains the difference between patches around the original and moved points or min eigen value if ``getMinEigenVals`` is checked. It can be NULL, if not needed.
283 .. seealso:: :ocv:func:`calcOpticalFlowPyrLK`
287 ocl::PyrLKOpticalFlow::dense
288 -----------------------------
289 Calculate dense optical flow.
291 .. ocv:function:: void ocl::PyrLKOpticalFlow::dense(const oclMat& prevImg, const oclMat& nextImg, oclMat& u, oclMat& v, oclMat* err = 0)
293 :param prevImg: First 8-bit grayscale input image.
295 :param nextImg: Second input image of the same size and the same type as ``prevImg`` .
297 :param u: Horizontal component of the optical flow of the same size as input images, 32-bit floating-point, single-channel
299 :param v: Vertical component of the optical flow of the same size as input images, 32-bit floating-point, single-channel
301 :param err: Output vector (CV_32FC1 type) that contains the difference between patches around the original and moved points or min eigen value if ``getMinEigenVals`` is checked. It can be NULL, if not needed.
305 ocl::PyrLKOpticalFlow::releaseMemory
306 ------------------------------------
307 Releases inner buffers memory.
309 .. ocv:function:: void ocl::PyrLKOpticalFlow::releaseMemory()
312 ocl::interpolateFrames
313 ----------------------
314 Interpolate frames (images) using provided optical flow (displacement field).
316 .. ocv:function:: void ocl::interpolateFrames(const oclMat& frame0, const oclMat& frame1, const oclMat& fu, const oclMat& fv, const oclMat& bu, const oclMat& bv, float pos, oclMat& newFrame, oclMat& buf)
318 :param frame0: First frame (32-bit floating point images, single channel).
320 :param frame1: Second frame. Must have the same type and size as ``frame0`` .
322 :param fu: Forward horizontal displacement.
324 :param fv: Forward vertical displacement.
326 :param bu: Backward horizontal displacement.
328 :param bv: Backward vertical displacement.
330 :param pos: New frame position.
332 :param newFrame: Output image.
334 :param buf: Temporary buffer, will have width x 6*height size, CV_32FC1 type and contain 6 oclMat: occlusion masks for first frame, occlusion masks for second, interpolated forward horizontal flow, interpolated forward vertical flow, interpolated backward horizontal flow, interpolated backward vertical flow.