compsci

  /** Method to show large changes in color
    * @param edgeDist the distance for finding edges
    */
  public void edgeDetection(int edgeDist, boolean test)
  {
    Pixel leftPixel = null;
    Pixel rightPixel = null;
    Pixel topPixel = null;
    Pixel bottomPixel = null;
    Pixel[][] pixels = this.getPixels2D();
    Color rightColor = null;
    Color bottomColor = null;
    Color topColor = 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);
      }
    }
    if(test){
    for (int col = 0 ; col < pixels[0].length -1;
    col++){
      for (int row = 0; row < pixels.length - 1; row++){
        topPixel = pixels[row][col];
        bottomPixel = pixels[row + 1][col];
        bottomColor = bottomPixel.getColor();
        topColor = topPixel.getColor();
        if(!(topColor.equals(Color.BLACK) || topColor.equals(Color.WHITE)) && !(bottomColor.equals(Color.WHITE)||bottomColor.equals(Color.BLACK) )){
          if (topPixel.colorDistance(bottomColor) > edgeDist)  {
          topPixel.setColor(Color.BLACK);
          }else{
          topPixel.setColor(Color.WHITE);
          }
        }
      }
    }
  }
  }