cvApproxChains    488 modules/imgproc/include/opencv2/imgproc/imgproc_c.h CVAPI(CvSeq*) cvApproxChains( CvSeq* src_seq, CvMemStorage* storage,
cvApproxChains    258 modules/imgproc/test/test_contours.cpp         contours2 = cvApproxChains( chain, storage, approx_method, 0, 0, 1 );