ext_from_int      183 modules/imgcodecs/test/test_grfmt.cpp                     if(ext_from_int(ext).empty())
ext_from_int      190 modules/imgcodecs/test/test_grfmt.cpp                         ts->printf(ts->LOG, "image type depth:%d   channels:%d   ext: %s\n", CV_8U, num_channels, ext_from_int(ext).c_str());
ext_from_int      194 modules/imgcodecs/test/test_grfmt.cpp                         string img_path = cv::tempfile(ext_from_int(ext).c_str());