void TestChromaRanges()
{
ImageUtility.ColorProfile profile = new ImageUtility.ColorProfile(ImageUtility.ColorProfile.STANDARD_PROFILE.sRGB);
float3 tempFloat3 = new float3(0, 0, 0);
float4 tempFloat4 = new float4(0, 0, 0, 1);
float Ygo, Cg, Co;
ranges_t[] ranges = new ranges_t[4];
for (int lumaIndex = 0; lumaIndex < ranges.Length; lumaIndex++)
{
ranges_t range = new ranges_t();
ranges[lumaIndex] = range;
float L = (1 + lumaIndex) / 255.0f;
for (int R = 0; R < 256; R++)
{
for (int G = 0; G < 256; G++)
{
for (int B = 0; B < 256; B++)
{
tempFloat4.x = L * R;
tempFloat4.y = L * G;
tempFloat4.z = L * B;
// Convert to YCoCg
// Ygo = 0.25f * tempFloat4.x + 0.5f * tempFloat4.y + 0.25f * tempFloat4.z;
// Cg = -0.25f * tempFloat4.x + 0.5f * tempFloat4.y - 0.25f * tempFloat4.z;
// Co = 0.50f * tempFloat4.x + 0.0f * tempFloat4.y - 0.50f * tempFloat4.z;
RGB2YCoCg(tempFloat4.x, tempFloat4.y, tempFloat4.z, out Ygo, out Co, out Cg);
YCoCg2RGB(Ygo, Co, Cg, out tempFloat3.x, out tempFloat3.y, out tempFloat3.z);
if (Math.Abs(tempFloat3.x - tempFloat4.x) > 1e-6)
{
throw new Exception("RHA!");
}
if (Math.Abs(tempFloat3.y - tempFloat4.y) > 1e-6)
{
throw new Exception("RHA!");
}
if (Math.Abs(tempFloat3.z - tempFloat4.z) > 1e-6)
{
throw new Exception("RHA!");
}
// Convert to xyY
float4 XYZ = float4.Zero;
profile.RGB2XYZ(tempFloat4, ref XYZ);
tempFloat3.x = XYZ.x;
tempFloat3.y = XYZ.y;
tempFloat3.z = XYZ.z;
float3 xyY = float3.Zero;
ImageUtility.ColorProfile.XYZ2xyY(tempFloat3, ref xyY);
// Update ranges
range.Ygo_min = Math.Min(range.Ygo_min, Ygo);
range.Ygo_max = Math.Max(range.Ygo_max, Ygo);
range.Cg_min = Math.Min(range.Cg_min, Cg);
range.Cg_max = Math.Max(range.Cg_max, Cg);
range.Co_min = Math.Min(range.Co_min, Co);
range.Co_max = Math.Max(range.Co_max, Co);
range.Y_min = Math.Min(range.Y_min, xyY.z);
range.Y_max = Math.Max(range.Y_max, xyY.z);
range.x_min = Math.Min(range.x_min, xyY.x);
range.x_max = Math.Max(range.x_max, xyY.x);
range.y_min = Math.Min(range.y_min, xyY.y);
range.y_max = Math.Max(range.y_max, xyY.y);
}
}
}
}
}
void TestChromaRanges()
{
ImageUtility.ColorProfile profile = new ImageUtility.ColorProfile(ImageUtility.ColorProfile.STANDARD_PROFILE.sRGB );
ImageUtility.float3 tempFloat3 = new ImageUtility.float3( 0, 0, 0 );
ImageUtility.float4 tempFloat4 = new ImageUtility.float4( 0, 0, 0, 1 );
float Ygo, Cg, Co;
ranges_t[] ranges = new ranges_t[4];
for ( int lumaIndex=0; lumaIndex < ranges.Length; lumaIndex++ ) {
ranges_t range = new ranges_t();
ranges[lumaIndex] = range;
float L = (1+lumaIndex) / 255.0f;
for ( int R=0; R < 256; R++ ) {
for ( int G=0; G < 256; G++ ) {
for ( int B=0; B < 256; B++ ) {
tempFloat4.x = L * R;
tempFloat4.y = L * G;
tempFloat4.z = L * B;
// Convert to YCoCg
// Ygo = 0.25f * tempFloat4.x + 0.5f * tempFloat4.y + 0.25f * tempFloat4.z;
// Cg = -0.25f * tempFloat4.x + 0.5f * tempFloat4.y - 0.25f * tempFloat4.z;
// Co = 0.50f * tempFloat4.x + 0.0f * tempFloat4.y - 0.50f * tempFloat4.z;
RGB2YCoCg( tempFloat4.x, tempFloat4.y, tempFloat4.z, out Ygo, out Co, out Cg );
YCoCg2RGB( Ygo, Co, Cg, out tempFloat3.x, out tempFloat3.y, out tempFloat3.z );
if ( Math.Abs( tempFloat3.x - tempFloat4.x ) > 1e-6 ) throw new Exception( "RHA!" );
if ( Math.Abs( tempFloat3.y - tempFloat4.y ) > 1e-6 ) throw new Exception( "RHA!" );
if ( Math.Abs( tempFloat3.z - tempFloat4.z ) > 1e-6 ) throw new Exception( "RHA!" );
// Convert to xyY
ImageUtility.float4 XYZ = profile.RGB2XYZ( tempFloat4 );
tempFloat3.x = XYZ.x;
tempFloat3.y = XYZ.y;
tempFloat3.z = XYZ.z;
ImageUtility.float3 xyY = ImageUtility.ColorProfile.XYZ2xyY( tempFloat3 );
// Update ranges
range.Ygo_min = Math.Min( range.Ygo_min, Ygo );
range.Ygo_max = Math.Max( range.Ygo_max, Ygo );
range.Cg_min = Math.Min( range.Cg_min, Cg );
range.Cg_max = Math.Max( range.Cg_max, Cg );
range.Co_min = Math.Min( range.Co_min, Co );
range.Co_max = Math.Max( range.Co_max, Co );
range.Y_min = Math.Min( range.Y_min, xyY.z );
range.Y_max = Math.Max( range.Y_max, xyY.z );
range.x_min = Math.Min( range.x_min, xyY.x );
range.x_max = Math.Max( range.x_max, xyY.x );
range.y_min = Math.Min( range.y_min, xyY.y );
range.y_max = Math.Max( range.y_max, xyY.y );
}
}
}
}
}
