Image Processing – Ken Lambert

The images package allows students to load, transform, and save digital images. For example, the following Java code loads an image, displays it, converts it to grayscale, and displays the changes:

import images.APImage;
import images.Pixel;
public class TestGrayscale{
    public static void main(String[]args){
        APImage image = new APImage("smokey.jpg");
        image.draw();
        for (Pixel p: image){
            int red = p.getRed();
            int green = p.getGreen();
            int blue = p.getBlue();
            int average = (red + green + blue) / 3;      
            p.setRed(average);
            p.setGreen(average);
            p.setBlue(average);      
        }
        image.draw();
    }
}

The APImage class includes methods to

get the width of an image
get its height
get a pixel at a given position
replace a pixel at a given position
iterate through all pixels
save an image to a file
create a copy (clone) of an image

The Pixel class includes methods to

get a pixel’s red, green, or blue value
replace a pixel’s red, green, or blue value

Download the images package

View the images API