edgeDetection

public void edgeDetection(int edgeDist)
{
   Pixel leftPixel = null;
   Pixel rightPixel = null;
   Pixel[][] pixels = this.getPixels2D();
   Color rightColor = null;
   for (int row = 0; row < pixels.length; row++)
   {
       for (int col = 0; col < pixels[0].length-1; col++)
       {
           leftPixel = pixels[row][col];
           rightPixel = pixels[row][col+1];
           rightColor = rightPixel.getColor();
           if (leftPixel.colorDistance(rightColor) > edgeDist)
               leftPixel.setColor(Color.BLACK);
           else
               leftPixel.setColor(Color.WHITE);
       }
   }
}