public TiffRgb24 ConvertToRgb24(byte y, byte cb, byte cr)
{
CodingRangeExpander expanderY = _expanderY;
CodingRangeExpander expanderCb = _expanderCb;
CodingRangeExpander expanderCr = _expanderCr;
YCbCrToRgbConverter converter = _converterFrom;
float y64 = expanderY.Expand(y);
float cb64 = expanderCb.Expand(cb);
float cr64 = expanderCr.Expand(cr);
TiffRgb24 pixel = default; // TODO: SkipInit
converter.Convert(y64, cb64, cr64, ref pixel);
return(pixel);
}
public YCbCrConverter(Rational[] referenceBlackAndWhite, Rational[] coefficients)
{
referenceBlackAndWhite ??= DefaultReferenceBlackWhite;
coefficients ??= DefaultLuma;
if (referenceBlackAndWhite.Length != 6)
{
TiffThrowHelper.ThrowImageFormatException("reference black and white array should have 6 entry's");
}
if (coefficients.Length != 3)
{
TiffThrowHelper.ThrowImageFormatException("luma coefficients array should have 6 entry's");
}
this.yExpander = new CodingRangeExpander(referenceBlackAndWhite[0], referenceBlackAndWhite[1], 255);
this.cbExpander = new CodingRangeExpander(referenceBlackAndWhite[2], referenceBlackAndWhite[3], 127);
this.crExpander = new CodingRangeExpander(referenceBlackAndWhite[4], referenceBlackAndWhite[5], 127);
this.converter = new YCbCrToRgbConverter(coefficients[0], coefficients[1], coefficients[2]);
}
public void Rgb_ConvertToYCbCrAndBack_SameResult()
{
var rgb = new RgbPixel(50, 150, 255);
var yCbCr = RgbToYCbCrConverter.Convert(rgb);
var newRgb = YCbCrToRgbConverter.Convert(yCbCr);
}
