void test()
{
HImage image("two.jpg");
HImage gray = image.Rgb1ToGray();
Hlong width, height;
image.GetImageSize(&width, &height);
HRegion region;
HTuple AbsoluteHisto, RelativeHisto;
AbsoluteHisto = image.GrayHisto(image, &RelativeHisto);
region.GenRegionHisto(RelativeHisto, 0, 0, 1);
HTuple MinThresh, MaxThresh