LAB 19 – Conditionally Modifying Pixels (part 3 – Highlighting Extremes and Blurring)
Topics
To replace a range of colors with one color in a picture: posterizing.
To average nearby pixels: blur
To combine Boolean expressions with and and or.
6.1 Conditional Pixel Changes
Type in the following code in the Program window (changing the comments):
import java.awt.Color;
/* Program that transforms pictures using loops and conditionals
*
* Picture and Pixel classes are defined in bookClasses developed
* at Georgia Tech by Mark Guzdial / Barbara Ericson
*
* @author Wayne Summers
* @date Sept. 23, 2007
*/
public class TransformPictures3
{
public static void main(String[] args)
{
String fileName1, fileName2;
System.out.println(“Find the source file”);
fileName1 = FileChooser.pickAFile(); // note that this pops up a window to select a jpg file
Picture sourcePicture;
sourcePicture = new Picture(fileName1);
// calls to methods that manipulate images go here
sourcePicture.show();
}
}
6.4 Highlighting Extremes
i) Type in the following code in the Program window below the main method and before the last }:
/**
* Method to replace the pixel colors of the picture that have a color distance less than
* the passed amount of white or black with the passed replacement color
* @param pict - picture Object to be modified
* @param amount - distance from white or black
* @param replacementColor - the new color to use
*/
public static void highlightLightAndDark(Picture sourcePic, double amount, Color replacementColor)
{
Pixel pix = null;
int width = sourcePic.getWidth();
int height = sourcePic.getHeight();
// loop through the pixels
