message: fix incorrect imshow behavior
diff: @@ -152,7 +152,7 @@ inline void convertToShow(const cv::Mat &src, cv::Mat &dst, bool toRGB = true)
  break;
  case CV_32F:
  case CV_64F: // assuming image has values in range [0, 1)
  - cv::convertScaleAbs(src, tmp, 256.);
  + src.convertTo(tmp, CV_8U, 255., 0.);
  break;
  }
  cv::cvtColor(tmp, dst, toRGB ? cv::COLOR_BGR2RGB : cv::COLOR_BGRA2BGR, dst.channels());
  