/// <summary>
/// Compares one image to another to calculate differences
/// </summary>
/// <param name="InputImage1"></param>
/// <param name="InputImage2"></param>
/// <param name="Tollerance"></param>
/// <returns></returns>
public static double CompareTo(this Bitmap InputImage1, Bitmap InputImage2, int Tollerance)
{
Bitmap Image1 = new Bitmap(InputImage1, new Size(128, 128));
Bitmap Image2 = new Bitmap(InputImage2, new Size(128, 128));
int Image1Size = Image1.Width * Image1.Height;
int Image2Size = Image2.Width * Image2.Height;
Bitmap Image3;
if (Image1Size > Image2Size)
{
Image1 = new Bitmap(Image1, Image2.Size);
Image3 = new Bitmap(Image2.Width, Image2.Height);
}
else
{
Image1 = new Bitmap(Image1, Image2.Size);
Image3 = new Bitmap(Image2.Width, Image2.Height);
}
for (int x = 0; x < Image1.Width; x++)
{
for (int y = 0; y < Image1.Height; y++)
{
Color Color1 = Image1.GetPixel(x, y);
Color Color2 = Image2.GetPixel(x, y);
int r = Color1.R > Color2.R ? Color1.R - Color2.R : Color2.R - Color1.R;
int g = Color1.G > Color2.G ? Color1.G - Color2.G : Color2.G - Color1.G;
int b = Color1.B > Color2.B ? Color1.B - Color2.B : Color2.B - Color1.B;
Image3.SetPixel(x, y, Color.FromArgb(r, g, b));
}
}
int Difference = 0;
for (int x = 0; x < Image1.Width; x++)
{
for (int y = 0; y < Image1.Height; y++)
{
Color Color1 = Image3.GetPixel(x, y);
int Media = (Color1.R + Color1.G + Color1.B) / 3;
if (Media > Tollerance)
{
Difference++;
}
}
}
double UsedSize = Image1Size > Image2Size ? Image2Size : Image1Size;
double result = Difference * 100 / UsedSize;
return(Difference * 100 / UsedSize);
}
public void CompareImages(string bmp1, string bmp2, byte threshold = 3)
{
//get the full path of the images
string image1Path = Path.Combine(sampleImagesFolder.FullName, bmp1);
string image2Path = Path.Combine(sampleImagesFolder.FullName, bmp2);
//compare the two
Console.WriteLine("Comparing images: " + bmp1 + " and " + bmp2 + ", with a threshold of " + threshold);
Bitmap InputImage1 = (Bitmap)Image.FromFile(image1Path);
Bitmap InputImage2 = (Bitmap)Image.FromFile(image2Path);
int size = 128; //128;
Bitmap Image1 = new Bitmap(InputImage1, new Size(size, size));
Bitmap Image2 = new Bitmap(InputImage2, new Size(size, size));
//int Image1Size = Image1.Width * Image1.Height;
//int Image2Size = Image2.Width * Image2.Height;
int Image1Size = InputImage1.Width * InputImage1.Height;
int Image2Size = InputImage2.Width * InputImage2.Height;
Bitmap Image3;
if (Image1Size > Image2Size)
{
Image1 = new Bitmap(Image1, Image2.Size);
Image3 = new Bitmap(Image2.Width, Image2.Height);
}
else if (Image1Size < Image2Size)
{
Image1 = new Bitmap(Image1, Image1.Size);
Image3 = new Bitmap(Image2.Width, Image2.Height);
}
else
{
Image1 = new Bitmap(Image1, Image1.Size);
Image3 = new Bitmap(Image2.Width, Image2.Height);
}
for (int x = 0; x < Image1.Width; x++)
{
for (int y = 0; y < Image1.Height; y++)
{
Color Color1 = Image1.GetPixel(x, y);
Color Color2 = Image2.GetPixel(x, y);
int r = Color1.R > Color2.R ? Color1.R - Color2.R : Color2.R - Color1.R;
int g = Color1.G > Color2.G ? Color1.G - Color2.G : Color2.G - Color1.G;
int b = Color1.B > Color2.B ? Color1.B - Color2.B : Color2.B - Color1.B;
Image3.SetPixel(x, y, Color.FromArgb(r, g, b));
}
}
//Find first matched cordindates
int xx = -1, yy = -1;
int Difference = 0;
for (int x = 0; x < Image1.Width; x++)
{
for (int y = 0; y < Image1.Height; y++)
{
Color Color1 = Image3.GetPixel(x, y);
int Media = (Color1.R + Color1.G + Color1.B) / 3;
if (Media > threshold)
{
Difference++;
}
else
{
//if match parameter are not set then set
if ((xx == -1 && yy == -1))
{
xx = x;
yy = y;
}
}
}
}
//int width = Image1Size > Image2Size ? Image1.Width : Image2.Width;
//int height = Image1Size > Image2Size ? Image1.Height : Image2.Height;
//int width = InputImage1.Width;
//int height = InputImage1.Height;
//int width2 = InputImage2.Width;
//int height2 = InputImage2.Height;
//for (int x = 0; x < width; x++)
//{
// for (int y = 0; y < height; y++)
// {
// if (x < width2 && y < height2)
// {
// if ((xx == -1 && yy == -1))
// {
// if (InputImage1.GetPixel(x, y) == InputImage2.GetPixel(x, y))
// {
// xx = x;
// yy = y;
// break;
// }
// }
// }
// }
//}
double UsedSize = Image1Size > Image2Size ? Image2Size : Image1Size;
if (Difference > UsedSize)
{
UsedSize = Image1Size > Image2Size ? Image1Size : Image2Size;
}
double result = Difference * 100 / UsedSize;
double matched = 100 - result;
Console.WriteLine(string.Format("Images Matched : {0:0.0} %, Difference: {1:0.0} %, Crop image match coordinates are x:{2}, y:{3}", matched, result, xx, yy));
Console.WriteLine("");
}