/// <summary>
/// Compares two images and has paramters for width and length start and end coordinates.
/// </summary>
/// <param name="smallImg"></param>
/// <param name="bigImg"></param>
/// <param name="topX"></param>
/// <param name="topY"></param>
/// <param name="botX"></param>
/// <param name="botY"></param>
public static int[] GetLocation(Bitmap smallImg, Bitmap bigImg, int topX, int topY, int botX, int botY)
{
int[] result = new int[2];
int max = 0, foundX = 0, foundY = 0, maxX = 0, maxY = 0, c = 0, d, match = 0;
Form1._Form1.pictureBox1.Image = bigImg;
Form1._Form1.pictureBox2.Image = smallImg;
LockBitmap lockSmall = new LockBitmap(smallImg);
LockBitmap lockBig = new LockBitmap(bigImg);
lockSmall.LockBits(); lockBig.LockBits(); //lock the bits
for (int y = topY; y < (botY - lockSmall.Height) - 1; y++) //borders only the area neccesary
{
d = 0; //reset small image search to the first x value
for (int x = topX; x < (botX - lockSmall.Width) - 1; x++) //borders only the area neccesary
{
if(lockBig.GetPixel(x, y) != lockSmall.GetPixel(d, c)) //no matches
{
d = 0;
match = 0;
continue;
}
else
{
if(match == 0) //max candidate
{
foundX = x;
foundY = y;
}
match++;
//checks for highest compatibility with image
if(match > max) //maintain max x and y coordinates for results
{
max = match;
maxX = foundX;
maxY = foundY;
}
if (d == lockSmall.Width - 1) //resets search to beginning of next line
{
c++;
topX = maxX;
break;
}
else
d++;
}
}
if (c == lockSmall.Height)
break;
}
//check if atleast one row of the image was found completely
if(max < lockSmall.Width)
{
lockSmall.UnlockBits(); lockBig.UnlockBits();
return result;
}
lockSmall.UnlockBits(); lockBig.UnlockBits();
result[0] = maxX; result[1] = maxY;
return result;
}
public static bool isEqual(Bitmap image1, Bitmap image2)
{
bool equal = true;
Form1._Form1.pictureBox1.Image = image2;
Form1._Form1.pictureBox2.Image = image1;
LockBitmap lock1 = new LockBitmap(image1);
LockBitmap lock2 = new LockBitmap(image2);
lock1.LockBits(); lock2.LockBits(); //lock the bits
for (int y = 0; y < lock1.Height; y++) //borders only the area neccesary
{
if (!equal) { break; }
for (int x = 0; x < lock1.Width; x++) //borders only the area neccesary
{
if (lock2.GetPixel(x, y) != lock1.GetPixel(x, y))
{
equal = false;
break;
}
}
}
lock1.UnlockBits(); lock2.UnlockBits();
return equal;
}
public static void Differences(Bitmap image1, Bitmap image2)
{
Form1._Form1.pictureBox1.Image = image2;
Form1._Form1.pictureBox2.Image = image1;
LockBitmap lock1 = new LockBitmap(image1);
LockBitmap lock2 = new LockBitmap(image2);
lock1.LockBits(); lock2.LockBits(); //lock the bits
for (int y = 0; y < lock1.Height; y++)
{
for (int x = 0; x < lock1.Width; x++)
{
if (lock2.GetPixel(x, y) != lock1.GetPixel(x, y))
{
lock1.SetPixel(x, y, Color.Red);
}
}
}
lock1.UnlockBits(); lock2.UnlockBits();
image1.Save("C:\\result.jpg");
//return image1;
}