public static int GetLuminance <TPixel>(TPixel sourcePixel)
where TPixel : struct, IPixel <TPixel>
{
var vector = sourcePixel.ToVector4();
return(ImageMaths.GetBT709Luminance(ref vector, 256));
}
private void RemovePixelsFromHistogram(ref Vector4 greyValuesBase, ref int histogramBase, int luminanceLevels, int length)
{
for (int idx = 0; idx < length; idx++)
{
int luminance = ImageMaths.GetBT709Luminance(ref Unsafe.Add(ref greyValuesBase, idx), luminanceLevels);
Unsafe.Add(ref histogramBase, luminance)--;
}
}
public void GetBT709Luminance_WithVector4(float x, float y, float z, int luminanceLevels, int expected)
{
// arrange
var vector = new Vector4(x, y, z, 0.0f);
// act
int actual = ImageMaths.GetBT709Luminance(ref vector, luminanceLevels);
// assert
Assert.Equal(expected, actual);
}