public static float DoFullCompare(int R1, int G1, int B1, int R2, int G2, int B2)
{
ColorFormulas oColor1 = new ColorFormulas(R1, G1, B1);
ColorFormulas oColor2 = new ColorFormulas(R2, G2, B2);
return(oColor1.CompareTo(oColor2));
}
///
/// The smaller the number returned by this, the closer the colors are
///
///
///
public float CompareTo(ColorFormulas oComparisionColor)
{
// Based upon the Delta-E (1976) formula at easyrgb.com (http://www.easyrgb.com/index.php?X=DELT&H=03#text3)
double DeltaE = Math.Sqrt(Math.Pow((CieL - oComparisionColor.CieL), 2) + Math.Pow((CieA - oComparisionColor.CieA), 2) + Math.Pow((CieB - oComparisionColor.CieB), 2));
return((float)DeltaE);
}
public static ComparisonReport CompareImages(Bitmap img1, Bitmap img2, float tolerance = 0)
{
Bitmap output = new Bitmap(img1.Width, img1.Height);
float maxDeltaE = float.MinValue;
float minDeltaE = float.MaxValue;
float totalDeltaE = 0;
float deltaEValues = 0;
float avgDeltaE = 0;
for (int x = 0; x < img1.Width; x++)
{
for (int y = 0; y < img1.Height; y++)
{
Color pixel1 = img1.GetPixel(x, y);
Color pixel2 = img2.GetPixel(x, y);
ColorFormulas cf1 = new ColorFormulas(pixel1.R, pixel1.G, pixel1.B);
ColorFormulas cf2 = new ColorFormulas(pixel2.R, pixel2.G, pixel2.B);
float deltaE = (cf1.CompareTo(cf2));
if (minDeltaE > deltaE)
{
minDeltaE = deltaE;
}
if (maxDeltaE < deltaE)
{
maxDeltaE = deltaE;
}
totalDeltaE += deltaE;
deltaEValues++;
if (deltaE <= tolerance)
{
Color pixel = img1.GetPixel(x, y);
double h, s, v;
ColorToHSV(pixel, out h, out s, out v);
pixel = ColorFromHSV(h, s / 10, 1 - v / 10);
output.SetPixel(x, y, pixel);
}
else
{
output.SetPixel(x, y, Color.Red);
}
}
}
avgDeltaE = totalDeltaE / deltaEValues;
return(new ComparisonReport(output, maxDeltaE, minDeltaE, avgDeltaE));
}
