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FinalExam Review Fall2005: From Decrease to Gray

 /**
   *Method to Grayscale*/
  public void decreaseGray()
  {
    Pixel pixel = null; // the current pixel
    int redValue;       // the amount of red
    int greenValue;       // the amount of green
    int blueValue;       // the amount of blue
    int grayValue;     //gray value
    
    // get the array of pixels for this picture object
    Pixel[] pixels = this.getPixels();    
    // start the index at 0
    int index = 0;

    // loop while the index is less than the length of the pixels array
    while (index < pixels.length)
    {
      // get the current pixel at this index
      pixel = pixels[index];
      // get the red value at the pixel
      redValue = pixel.getRed();
      greenValue = pixel.getGreen();
      blueValue = pixel.getBlue();

      grayValue = (redValue+greenValue+blueValue)/3
     // set the red for this pixel to the new value
      pixel.setRed(grayValue);
      pixel.setGreen(grayValue);
      pixel.setBlue(grayValue);
      // increment the index
      index++;
    }
  }

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• Final Exam Review Fall2005 last edited on 5 December 2006 at 11:22 am by r54h53.res.gatech.edu