Pattern Recognition for image comparision in .net
- by vinod R
hi
Can anybody share code or algorithm(using pattern
recognition) for image comparision in .net .
I need to compare 2 images of different resolution and textures
and the find the difference . Now i have code to find the difference
between 2 images using C#
// Load the images.
Bitmap bm1 = (Bitmap) (Image.FromFile(txtFile1.Text));
Bitmap bm2 = (Bitmap) (Image.FromFile(txtFile2.Text));
// Make a difference image.
int wid = Math.Min(bm1.Width, bm2.Width);
int hgt = Math.Min(bm1.Height, bm2.Height);
Bitmap bm3 = new Bitmap(wid, hgt);
// Create the difference image.
bool are_identical = true;
int r1;
int g1;
int b1;
int r2;
int g2;
int b2;
int r3;
int g3;
int b3;
Color eq_color = Color.Transparent;
Color ne_color = Color.Transparent;
for (int x = 0; x <= wid - 1; x++)
{
for (int y = 0; y <= hgt - 1; y++)
{
if (bm1.GetPixel(x, y).Equals(bm2.GetPixel(x, y)))
{
bm3.SetPixel(x, y, eq_color);
}
else
{
bm1.SetPixel(x, y, ne_color);
are_identical = false;
}
}
}
// Display the result.
picResult.Image = bm1;
Bitmap Logo = new Bitmap(picResult.Image);
Logo.MakeTransparent(Logo.GetPixel(1, 1));
picResult.Image = (Image)Logo;
//this.Cursor = Cursors.Default;
if ((bm1.Width != bm2.Width) || (bm1.Height != bm2.Height))
{
are_identical = false;
}
if (are_identical)
{
MessageBox.Show("The images are identical");
}
else
{
MessageBox.Show("The images are different");
}
//bm1.Dispose()
// bm2.Dispose()
BUT this compare if the 2 images are of same resolution and size.if some
shadow is there on one image(but the 2 images are same) it shows the difference
between the image..so i am trying to compare using pattern recognition.
Thanks in advance
