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This module contains review questions and answers keyed to the module titled Java3028: Clipping Images.

Revised: Mon Apr 04 10:44:15 CDT 2016

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This module contains review questions and answers keyed to the module titled Java3028: Clipping Images .

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.


Question 1 .

Given the input image shown in Figure 1 , which of the following output images is produced by the code in Listing 1 ?

A. Figure 2

B. Figure 3

Listing 1 . Question 1.
/*File Java3028ra Copyright 2013 R.G.Baldwin *********************************************************/import java.awt.Graphics2D; import java.awt.geom.AffineTransform;import java.awt.geom.Rectangle2D; import java.awt.Graphics;import java.awt.geom.Ellipse2D; import java.awt.Color;public class Java3028ra{ public static void main(String[]args){ new Java3028raRunner().run();}//end main method }//end class Java3028ra//======================================================// class Java3028raRunner{public void run(){ Picture pix = new Picture("Prob04a.jpg");pix = rotatePicture(pix,35); pix = mirrorUpperQuads(pix);pix = mirrorHoriz(pix); pix = clipToEllipse(pix);pix.explore(); }//end run//----------------------------------------------------// private Picture clipToEllipse(Picture pix){Picture result = new Picture(pix.getWidth(),pix.getHeight());result.setAllPixelsToAColor(Color.RED); Graphics2D g2 = (Graphics2D)(result.getGraphics());Ellipse2D.Double ellipse = new Ellipse2D.Double(28,64,366,275);g2.setClip(ellipse); g2.drawImage(pix.getImage(),0,0,pix.getWidth(),pix.getHeight(), null);return result; }//end clipToEllipse//----------------------------------------------------//private Picture rotatePicture(Picture pix, double angle){AffineTransform rotateTransform = new AffineTransform();rotateTransform.rotate(Math.toRadians(angle), pix.getWidth()/2,pix.getHeight()/2); Rectangle2D rectangle2D =pix.getTransformEnclosingRect(rotateTransform); int resultWidth = (int)(rectangle2D.getWidth());int resultHeight = (int)(rectangle2D.getHeight()); AffineTransform translateTransform =new AffineTransform(); translateTransform.translate((resultWidth - pix.getWidth())/2, (resultHeight - pix.getHeight())/2);translateTransform.concatenate(rotateTransform); Picture result = new Picture(resultWidth,resultHeight); Graphics2D g2 = (Graphics2D)result.getGraphics();g2.drawImage(pix.getImage(),translateTransform,null); return result;}//end rotatePicture //----------------------------------------------------//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 loopreturn pix; }//end mirrorUpperQuads//----------------------------------------------------// 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 loopreturn pix; }//end mirrorHoriz//----------------------------------------------------// }//end class Java3028raRunner

Figure 1 - Prob04a.jpg

Input image to the program shown in Listing 1.

Figure 2 - Possible output image.

Possible output image from the program shown in Listing 1.

Figure 3 - Possible output image.

Possible output image from the program shown in Listing 1.

Answer 1



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.

Spacer image of a rabbit and a penguin.

This image was also inserted for the purpose of inserting space between the questions and the answers.

Spacer image of a penguin in the snow in front of some houses.


Answer 1

The code in Listing 1 produces the output image shown in Figure 3 .

Back to Question 1


This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Java3028r Review
  • File: Java3028r.htm
  • Published: 02/18/13

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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.


Questions & Answers

what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
preparation of nanomaterial
Victor Reply
how to synthesize TiO2 nanoparticles by chemical methods
what's the program
what chemical
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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