665     Size blocksize, dftsize;  in crossCorr()  local
674     dftsize.width = std::max(getOptimalDFTSize(blocksize.width + templ.cols - 1), 2);  in crossCorr()
675     dftsize.height = getOptimalDFTSize(blocksize.height + templ.rows - 1);  in crossCorr()
676     if( dftsize.width <= 0 || dftsize.height <= 0 )  in crossCorr()
680     blocksize.width = dftsize.width - templ.cols + 1;  in crossCorr()
682     blocksize.height = dftsize.height - templ.rows + 1;  in crossCorr()
685     Mat dftTempl( dftsize.height*tcn, dftsize.width, maxDepth );  in crossCorr()
686     Mat dftImg( dftsize, maxDepth );  in crossCorr()
704         int yofs = k*dftsize.height;  in crossCorr()
706         Mat dst(dftTempl, Rect(0, yofs, dftsize.width, dftsize.height));  in crossCorr()
781             Mat dftTempl1(dftTempl, Rect(0, tcn > 1 ? k*dftsize.height : 0,  in crossCorr()
782                                          dftsize.width, dftsize.height));  in crossCorr()