/// <summary>
/// Assess Mean G-SSIM of a distorted bitmap with the reference bitmap
/// </summary>
/// <param name="reference">Reference bitmap</param>
/// <param name="distorted">Distorted bitmap</param>
/// <param name="component">Specify which components will be assessed, multiple components can be set by using bitwise-or</param>
/// <exception cref="ArgumentNullException">Thrown when at least one param is null</exception>
/// <exception cref="ArgumentException">Thrown when the size of the two bitmaps are not illegal for assessment (Sizes are not same, Size too small, etc.)</exception>
/// <returns>A new AssessResult object indicates the assess results in every specified component.</returns>
public override AssessResult Assess(Bitmap reference, Bitmap distorted, UseComponent component)
{
InitBitmaps(reference, distorted);
LumaReference = Downscaler.DownscaleByKeepMinLength(LumaReference, ScaleMinLength);
LumaDistorted = Downscaler.DownscaleByKeepMinLength(LumaDistorted, ScaleMinLength);
SsimParameters gssimParams = new SsimParameters(WindowWidth, WindowHeight, C1, C2, C3);
GssimCalculator gssimCalc = new GssimCalculator(gssimParams);
AssessResult res = new AssessResult();
if (component.HasFlag(UseComponent.Luma))
{
res.Luma = gssimCalc.CalcMeanGssim(LumaReference, LumaDistorted);
}
if (component.HasFlag(UseComponent.Cb))
{
res.Cb = gssimCalc.CalcMeanGssim(CbReference, CbDistorted);
}
if (component.HasFlag(UseComponent.Cr))
{
res.Cr = gssimCalc.CalcMeanGssim(CrReference, CrDistorted);
}
return res;
}
/// <summary>
/// Assess Mean G-SSIM of a distorted bitmap with the reference bitmap
/// </summary>
/// <param name="reference">Reference bitmap</param>
/// <param name="distorted">Distorted bitmap</param>
/// <param name="component">Specify which components will be assessed, multiple components can be set by using bitwise-or</param>
/// <exception cref="ArgumentNullException">Thrown when at least one param is null</exception>
/// <exception cref="ArgumentException">Thrown when the size of the two bitmaps are not illegal for assessment (Sizes are not same, Size too small, etc.)</exception>
/// <returns>A new AssessResult object indicates the assess results in every specified component.</returns>
public override AssessResult Assess(Bitmap reference, Bitmap distorted, UseComponent component)
{
InitBitmaps(reference, distorted);
LumaReference = Downscaler.DownscaleByKeepMinLength(LumaReference, ScaleMinLength);
LumaDistorted = Downscaler.DownscaleByKeepMinLength(LumaDistorted, ScaleMinLength);
SsimParameters gssimParams = new SsimParameters(WindowWidth, WindowHeight, C1, C2, C3);
GssimCalculator gssimCalc = new GssimCalculator(gssimParams);
AssessResult res = new AssessResult();
if (component.HasFlag(UseComponent.Luma))
{
res.Luma = gssimCalc.CalcMeanGssim(LumaReference, LumaDistorted);
}
if (component.HasFlag(UseComponent.Cb))
{
res.Cb = gssimCalc.CalcMeanGssim(CbReference, CbDistorted);
}
if (component.HasFlag(UseComponent.Cr))
{
res.Cr = gssimCalc.CalcMeanGssim(CrReference, CrDistorted);
}
return(res);
}
