message: fix bug in rgb to hsv
diff: @@ -54,7 +54,7 @@ namespace BaseImageHelper {
  float min, max, delta;
  min = std::min(std::min(r, g), b);
  - max = std::min(std::min(r, g), b);
  + max = std::max(std::max(r, g), b);
  hsv[2] = max; // v
  delta = max - min;
  if (max != 0)
  