public HSVfloat RGBtoHSV(RGBfloat rgb)
{
HSVfloat hsv = new HSVfloat();
float min = minValue(minValue(rgb.red, rgb.green), rgb.blue);
float max = maxValue(maxValue(rgb.red, rgb.green), rgb.blue);
float chroma = max - min;
hsv.hue = 0;
hsv.sat = 0;
if (chroma != 0.0f)
{
if (rgb.red == max)
{
hsv.hue = (rgb.green - rgb.blue) / chroma;
if (hsv.hue < 0.0f)
{
hsv.hue += 6.0f;
}
}
else if (rgb.green == max)
{
hsv.hue = ((rgb.blue - rgb.red) / chroma) + 2.0f;
}
else
{
hsv.hue = ((rgb.red - rgb.green) / chroma) + 4.0f;
}
hsv.hue *= 60.0f;
hsv.sat = chroma / max;
}
hsv.val = max;
return(hsv);
}
public void init(Image image, int sliceNumber)
{
_height = image.Height;
Bitmap slice = new Bitmap(image);
Color[] pixelColumn = new Color[slice.Height];
for (int i = 0; i < slice.Height; ++i)
{
pixelColumn[i] = slice.GetPixel(sliceNumber, i);
}
for (int i = 0; i < _height; i++)
{
_averageRed += pixelColumn[i].R;
_averageGreen += pixelColumn[i].G;
_averageBlue += pixelColumn[i].B;
}
_averageRed = _averageRed /= _height;
_averageGreen = _averageGreen /= _height;
_averageBlue = _averageBlue /= _height;
RGBfloat rgb;
rgb.red = _averageRed / 255;
rgb.green = _averageGreen / 255;
rgb.blue = _averageBlue / 255;
HSVfloat hsv = util.RGBtoHSV(rgb);
_averageHue = (hsv.hue / 360) * 255;
_averageSat = hsv.sat * 255;
_averageVal = hsv.val * 255;
}