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Revised: Sun Apr 03 14:07:48 CDT 2016
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This module contains review questions and answers keyed to the module titled Java3016: Green-Screen Processing .
The questions and the answers are connected by hyperlinks to make it easy for you to navigate from the question to the answer and back again.
Given Figure 1 , Figure 2 , Figure 3 , and Figure 4 , which of the following output images is produced by the code in Listing 1 ?
A. Figure 5
B. Figure 6
| Listing 1 . Question 1. |
|---|
/*File Java3016ra Copyright 2013 R.G.Baldwin
Revised 02/15/13*********************************************************/
import java.awt.Color;public class Java3016ra{
public static void main(String[]args){
new Java3016raRunner().run();}//end main
}//end class Java3016ra//======================================================//
class Java3016raRunner{public void run(){
Picture snowScene = crop(new Picture("Prob03d.jpg"),6,59,344,256);
greenScreenDraw(crop(new Picture("Prob03a.bmp"),123,59,110,256),snowScene,117,0);
greenScreenDraw(crop(new Picture("Prob03c.bmp"),123,59,110,256).
getPictureWithHeight(256/2),snowScene,55,64);greenScreenDraw(
crop(new Picture("Prob03b.bmp"),123,59,110,256).getPictureWithHeight(256/3),snowScene,260,96);
snowScene.explore();}//end run method
//----------------------------------------------------//private void greenScreenDraw(Picture source,
Picture dest,int destX,
int destY){Pixel pixel = null;
Color color = null;for(int row = 0;row<source.getHeight();row++){
for(int col = 0;col<source.getWidth();col++){
color = source.getPixel(col,row).getColor();if((!(color.equals(Color.GREEN)))&&(!(color.getRed()<40))){
dest.getPixel(destX + col,destY + row).setColor(color);
}//end if}//end inner loop
}//end outer loop}//end greenScreenDraw
//----------------------------------------------------//private Picture crop(Picture pic,int startCol,
int startRow,int width,
int height){Picture output = new Picture(width,height);
int colOut = 0,rowOut=0,col=0,row=0;Pixel pixel = null;
Color color = null;for(col = startCol;
col<startCol+width;
col++,colOut++){for(row = startRow;
row<startRow+height;
row++,rowOut++){output.getPixel(colOut,rowOut).
setColor(pic.getPixel(col,row).getColor());}//end inner loop
rowOut = 0;}//end outer loop
return output;}//end crop
//----------------------------------------------------//
}//end class Java3016raRunner |
Figure 1 - Prob03a.bmp.
Figure 2 - Prob03b.bmp.
Figure 3 - Prob03c.bmp.
Figure 4 - Prob03d.jpg.
Figure 5 - Possible output image.
Figure 6 - Possible output image.
What is the meaning of the following two images?
This image was inserted here simply to insert some space between the questions and the answers to keep them from being visible on the screen at thesame time.
The image is also an example of the kinds of things that we do in my course titled ITSE 2321, Object-Oriented Programming.
This image was also inserted for the purpose of inserting space between the questions and the answers.
The code in Listing 1 produces the output image shown in Figure 6 .
This section contains a variety of miscellaneous information.
Financial : Although the Connexions site makes it possible for you to download aPDF file for this module at no charge, and also makes it possible for you to purchase a pre-printed version of the PDF file, youshould be aware 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 ofthe module.
In the past, unknown individuals have copied my modules from cnx.org, converted them to Kindle books, and placed them for sale onAmazon.com showing me as the author. I neither receive compensation for those sales nor do I know who does receive compensation. If youpurchase such a book, please be aware that it is a copy of a module that is freely available on cnx.org and that it was made andpublished without my prior knowledge.
Affiliation : I am a professor of Computer Information Technology at Austin Community College in Austin, TX.
-end-
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