Package opencv

restype: the result type argtypes: a sequence specifying the argument types

The function prototype can be called in different ways to create a callable object:

prototype(integer address) -> foreign function prototype(callable) -> create and return a C callable function from callable prototype(integer index, method name[, paramflags]) -> foreign function calling a COM method prototype((ordinal number, dll object)[, paramflags]) -> foreign function exported by ordinal prototype((function name, dll object)[, paramflags]) -> foreign function exported by name

Returns:

function prototype

Parameters:

• src_img (IplImage) - source image
• dst_img (IplImage) - destination image
• rect (CvRECT) - the rectangle of interest

Returns:

nothing

build and apply a ctypes prototype complete with parameter flags

e.g.

cvMinMaxLoc = cfunc('cvMinMaxLoc', _cxDLL, None,

('image', POINTER(IplImage), 1), ('min_val', POINTER(double), 2), ('max_val', POINTER(double), 2), ('min_loc', POINTER(CvPoint), 2), ('max_loc', POINTER(CvPoint), 2), ('mask', POINTER(IplImage), 1, None))

means locate cvMinMaxLoc in dll _cxDLL, it returns nothing. The first argument is an input image. The next 4 arguments are output, and the last argument is input with an optional value. A typical call might look like:

min_val,max_val,min_loc,max_loc = cvMinMaxLoc(img)

cvOr

Value:

cfunc('cvOr', _cxDLL, None, ('src1', c_void_p, 1), ('src2', c_void_p, 1), ('dst', c_void_p, 1), ('mask', c_void_p, 1, None),)

cvStartWriteSeq

Value:

cfunc('cvStartWriteSeq', _cxDLL, None, ('seq_flags', c_int, 1), ('head er_size', c_int, 1), ('elem_size', c_int, 1), ('storage', POINTER(CvMe mStorage), 1), ('writer', POINTER(CvSeqWriter), 1),)

cvGraphFindEdgeByPtr

Value:

cfunc('cvFindGraphEdgeByPtr', _cxDLL, POINTER(CvGraphEdge), ('graph', POINTER(CvGraph), 1), ('start_vtx', POINTER(CvGraphVtx), 1), ('end_vtx ', POINTER(CvGraphVtx), 1),)

cvKalmanCorrect

Value:

cfunc('cvKalmanCorrect', _cvDLL, POINTER(CvMat), ('kalman', POINTER(Cv Kalman), 1), ('measurement', POINTER(CvMat), 1),)

cvTreeToNodeSeq

Value:

cfunc('cvTreeToNodeSeq', _cxDLL, POINTER(CvSeq), ('first', c_void_p, 1 ), ('header_size', c_int, 1), ('storage', POINTER(CvMemStorage), 1),)

cvSaveImage

Value:

cfunc('cvSaveImage', _hgDLL, c_int, ('filename', c_char_p, 1), ('image ', c_void_p, 1),)

cvMahalanobis

Value:

cfunc('cvMahalanobis', _cxDLL, c_double, ('vec1', c_void_p, 1), ('vec2 ', c_void_p, 1), ('mat', c_void_p, 1),)

cvReleaseConDensation

Value:

cfunc('cvReleaseConDensation', _cvDLL, None, ('condens', POINTER(POINT ER(CvConDensation)), 1),)

cvFindNearestPoint2D

Value:

cfunc('cvFindNearestPoint2D', _cvDLL, POINTER(CvSubdiv2DPoint), ('subd iv', POINTER(CvSubdiv2D), 1), ('pt', CvPoint2D32f, 1),)

cvFilter2D

Value:

cfunc('cvFilter2D', _cvDLL, None, ('src', c_void_p, 1), ('dst', c_void _p, 1), ('kernel', POINTER(CvMat), 1), ('anchor', CvPoint, 1),)

cvDrawPolyLine

Value:

cfunc('cvPolyLine', _cxDLL, None, ('img', c_void_p, 1), ('pts', POINTE R(POINTER(CvPoint)), 1), ('npts', POINTER(c_int), 1), ('contours', c_i nt, 1), ('is_closed', c_int, 1), ('color', CvScalar, 1), ('thickness', c_int, 1, 1), ('line_type', c_int, 1, 8), ('shift', c_int, 1, 0),)

cvFindChessboardCorners

Value:

cfunc('cvFindChessboardCorners', _cvDLL, c_int, ('image', c_void_p, 1) , ('pattern_size', CvSize, 1), ('corners', POINTER(CvPoint2D32f), 1), ('corner_count', POINTER(c_int), 1, None), ('flags', c_int, 1),)

cvFindExtrinsicCameraParams2

Value:

cfunc('cvFindExtrinsicCameraParams2', _cvDLL, None, ('object_points', POINTER(CvMat), 1), ('image_points', POINTER(CvMat), 1), ('intrinsic_m atrix', POINTER(CvMat), 1), ('distortion_coeffs', POINTER(CvMat), 1), ('rotation_vector', POINTER(CvMat), 1), ('translation_vector', POINTER (CvMat), 1),)

cvCvtScale

Value:

cfunc('cvConvertScale', _cxDLL, None, ('src', c_void_p, 1), ('dst', c_ void_p, 1), ('scale', c_double, 1, 1), ('shift', c_double, 1, 0),)

cvCreateFileCapture

Value:

cfunc('cvCreateFileCapture', _hgDLL, POINTER(CvCapture), ('filename', c_char_p, 1),)

cvCalcOpticalFlowLK

Value:

cfunc('cvCalcOpticalFlowLK', _cvDLL, None, ('prev', c_void_p, 1), ('cu rr', c_void_p, 1), ('win_size', CvSize, 1), ('velx', c_void_p, 1), ('v ely', c_void_p, 1),)

cvMinAreaRect2

Value:

cfunc('cvMinAreaRect2', _cvDLL, CvBox2D, ('points', c_void_p, 1), ('st orage', POINTER(CvMemStorage), 1, None),)

cvCloneGraph

Value:

cfunc('cvCloneGraph', _cxDLL, POINTER(CvGraph), ('graph', POINTER(CvGr aph), 1), ('storage', POINTER(CvMemStorage), 1),)

cvSetND

Value:

cfunc('cvSetND', _cxDLL, None, ('arr', c_void_p, 1), ('idx', POINTER(c _int), 1), ('value', CvScalar, 1),)

cvSetReal3D

Value:

cfunc('cvSetReal3D', _cxDLL, None, ('arr', c_void_p, 1), ('idx0', c_in t, 1), ('idx1', c_int, 1), ('idx2', c_int, 1), ('value', c_double, 1), )

cvRetrieveFrame

Value:

cfunc('cvRetrieveFrame', _hgDLL, POINTER(IplImage), ('capture', POINTE R(CvCapture), 1),)

cvMorphologyEx

Value:

cfunc('cvMorphologyEx', _cvDLL, None, ('src', c_void_p, 1), ('dst', c_ void_p, 1), ('temp', c_void_p, 1), ('element', POINTER(IplConvKernel), 1), ('operation', c_int, 1), ('iterations', c_int, 1, 1),)

cvLoadHaarClassifierCascade

Value:

cfunc('cvLoadHaarClassifierCascade', _cvDLL, POINTER(CvHaarClassifierC ascade), ('directory', c_char_p, 1), ('orig_window_size', CvSize, 1),)

cvSeqPush

Value:

cfunc('cvSeqPush', _cxDLL, c_void_p, ('seq', POINTER(CvSeq), 1), ('ele ment', c_void_p, 1, None),)

cvWriteString

Value:

cfunc('cvWriteString', _cxDLL, None, ('fs', POINTER(CvFileStorage), 1) , ('name', c_char_p, 1), ('str', c_char_p, 1), ('quote', c_int, 1, 0), )

cvCompareHist

Value:

cfunc('cvCompareHist', _cvDLL, c_double, ('hist1', POINTER(CvHistogram ), 1), ('hist2', POINTER(CvHistogram), 1), ('method', c_int, 1),)

cvGetDims

Value:

cfunc('cvGetDims', _cxDLL, c_int, ('arr', c_void_p, 1), ('sizes', POIN TER(c_int), 1, None),)

cvPyrSegmentation

Value:

cfunc('cvPyrSegmentation', _cvDLL, None, ('src', POINTER(IplImage), 1) , ('dst', POINTER(IplImage), 1), ('storage', POINTER(CvMemStorage), 1) , ('comp', POINTER(POINTER(CvSeq)), 1), ('level', c_int, 1), ('thresho ld1', c_double, 1), ('threshold2', c_double, 1),)

cvPolarToCart

Value:

cfunc('cvPolarToCart', _cxDLL, None, ('magnitude', c_void_p, 1), ('ang le', c_void_p, 1), ('x', c_void_p, 1), ('y', c_void_p, 1), ('angle_in_ degrees', c_int, 1, 0),)

cvMakeHistHeaderForArray

Value:

cfunc('cvMakeHistHeaderForArray', _cvDLL, POINTER(CvHistogram), ('dims ', c_int, 1), ('sizes', POINTER(c_int), 1), ('hist', POINTER(CvHistogr am), 1), ('data', POINTER(c_float), 1), ('ranges', ListPOINTER2(c_floa t), 1, None), ('uniform', c_int, 1, 1),)

cvRegisterModule

Value:

cfunc('cvRegisterModule', _cxDLL, c_int, ('module_info', POINTER(CvMod uleInfo), 1),)

cvHaarDetectObjects

Value:

cfunc('cvHaarDetectObjects', _cvDLL, POINTER(CvSeq), ('image', c_void_ p, 1), ('cascade', POINTER(CvHaarClassifierCascade), 1), ('storage', P OINTER(CvMemStorage), 1), ('scale_factor', c_double, 1, 1), ('min_neig hbors', c_int, 1, 3), ('flags', c_int, 1, 0), ('min_size', CvSize, 1), )

cvFindType

Value:

cfunc('cvFindType', _cxDLL, POINTER(CvTypeInfo), ('type_name', c_char_ p, 1),)