int centerX = spectrumCplx.cols/2;
 54     int centerY = spectrumCplx.rows/2;
 55     if( flag == HIGH_PASS_FILTER ) {
 56         // ponechejte pouze hodnoty spektra nad limitní frekvencí
 57         for (int row = 0; row < spectrumCplx.rows; row++) {
 58             for (int col = 0; col < spectrumCplx.cols; col++) {
 59                 if((col >= (centerX - limit_frequency/2) && col < centerX + limit_frequency/2) &&
 60                    (row >= (centerY - limit_frequency/2) && row < centerY + limit_frequency/2)){
 61                     spectrumCplx.at<cv::Vec2f>(row,col).val[0] = 0.0;
 62                     spectrumCplx.at<cv::Vec2f>(row,col).val[1] = 0.0;
 63                 }
 64             }
 65         }
 66
 67     }
 68     else if( flag == LOW_PASS_FILTER ) {
 69         // ponechejte pouze hodnoty spektra pod limitní frekvencí
 70         for (int row = 0; row < spectrumCplx.rows; row++) {
 71             for (int col = 0; col < spectrumCplx.cols; col++) {
 72                 if((col < (centerX - limit_frequency/2) || col > centerX -1 + limit_frequency/2) ||
 73                    (row < (centerY - limit_frequency/2) || row > centerY -1 + limit_frequency/2)){
 74                     spectrumCplx.at<cv::Vec2f>(row,col).val[0] = 0.0;
 75                     spectrumCplx.at<cv::Vec2f>(row,col).val[1] = 0.0;
 76                 }
 77
 78             }
 79         }
 80
 81     }