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Very similar to an earlier method
This method is very similar to the method named mirrorUpperQuads that I explained in Listing 4 and Listing 5 . If you understood that explanation, you should have no difficulty understanding the code in Listing 7 without further explanation.
End of Prob01Runner class
Listing 7 also signals the end of the class named Prob01Runner .
I encourage you to copy the code from Listing 8 . Compile the code and execute it. Experiment with the code, making changes, andobserving the results of your changes. Make certain that you can explain why your changes behave as they do.
Click here to download the required input image file.
In this module, you learned how to use nested for loops to process pixels on a row and column basis.
You will learn to crop, flip, and combine pictures in the next module.
While not a requirement of the course, you can select the following links to view optional online video lectures on the material in thismodule.
This section contains a variety of miscellaneous information.
Financial : Although the Connexions site makes it possible for you to download a PDF file for thismodule at no charge, and also makes it possible for you to purchase a pre-printed version of the PDF file, you should beaware that some of the HTML elements in this module may not translate well into PDF.
I also want you to know that, I receive no financial compensation from the Connexions website even if you purchase the PDF version of the module.
In the past, unknown individuals have copied my modules from cnx.org, converted them to Kindle books, and placed them for sale on Amazon.com showing me as the author. Ineither receive compensation for those sales nor do I know who does receive compensation. If you purchase such a book, please beaware that it is a copy of a module that is freely available on cnx.org and that it was made and published withoutmy prior knowledge.
Affiliation : I am a professor of Computer Information Technology at Austin Community College in Austin, TX.
A complete listing of the program discussed in this module is shown in Listing 8 below.
| Listing 8 . Complete program listing. |
|---|
/*File Prob01 Copyright 2008 R.G.Baldwin
Revised 12/16/08*********************************************************/
public class Prob01{public static void main(String[] args){Picture pic = new Prob01Runner().run();
System.out.println(pic);}//end main method
}//end class Prob01//======================================================//
class Prob01Runner{public Prob01Runner(){
System.out.println("Display your name here.");}//end constructor
//----------------------------------------------------//public Picture run(){
Picture pix = new Picture("Prob01.jpg");//Display the input picture.
pix.explore();//Call the mirrorUpperQuads method to modify the top
// half of the picture.pix = mirrorUpperQuads(pix);
//Mirror the top half into the bottom half.pix = mirrorHoriz(pix);
//Add your name and display the output picture.pix.addMessage("Display your name here.",10,20);
pix.explore();return pix;
}//end run//----------------------------------------------------//
//This method mirrors the upper-left quadrant of a// picture into the upper-right quadrant.
private Picture mirrorUpperQuads(Picture pix){Pixel leftPixel = null;
Pixel rightPixel = null;int midpoint = pix.getWidth()/2;
int width = pix.getWidth();for(int row = 0;row<pix.getHeight()/2;row++){
for(int col = 0;col<midpoint;col++){
leftPixel = pix.getPixel(col,row);rightPixel =
pix.getPixel(width-1-col,row);rightPixel.setColor(leftPixel.getColor());
}//end inner loop}//end outer loop
return pix;}//end mirrorUpperQuads
//----------------------------------------------------////This method mirrors the top half of a picture into
// the bottom half.private Picture mirrorHoriz(Picture pix){
Pixel topPixel = null;Pixel bottomPixel = null;
int midpoint = pix.getHeight()/2;int height = pix.getHeight();
for(int col = 0;col<pix.getWidth();col++){
for(int row = 0;row<midpoint;row++){
topPixel = pix.getPixel(col,row);bottomPixel =
pix.getPixel(col,height-1-row);bottomPixel.setColor(topPixel.getColor());
}//end inner loop}//end outer loop
return pix;}//end mirrorHoriz
//----------------------------------------------------//}//end class Prob01Runner |
-end-
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