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This module contains review questions and answers keyed to the module titled Java3030: Merging Pictures.

Revised: Mon Apr 04 11:10:04 CDT 2016

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This module contains review questions and answers keyed to the module titled Java3030: Merging Pictures .

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 two input images shown in Figure 1 and Figure 2 , which of the following two output images is produced by the code in Listing 1 ? Note that the differences in the two possible output images are subtle. Also note the RGB colorvalues shown at the same cursor location in all four images.

A. Figure 3

B. Figure 4

Listing 1 . Question 1.
/*File Java3030ra Copyright 2013 R.G.Baldwin *********************************************************/import java.awt.Color; import java.awt.Graphics2D;import java.awt.Graphics; import java.awt.GradientPaint;import java.awt.geom.Ellipse2D; public class Java3030ra{public static void main(String[] args){new Java3030raRunner().run(); }//end main method}//end class Java3030ra //======================================================//class Java3030raRunner{ public void run(){Picture penguin = new Picture("Prob05a.jpg"); penguin.explore();Picture hare = new Picture("Prob05b.jpg"); hare.explore();merge(hare,penguin); hare.explore();}//end run //----------------------------------------------------//private void merge(Picture left,Picture right){ int width = left.getWidth();int height = left.getHeight(); double scaleL = 0;double scaleR = 0; int redL = 0;int greenL = 0; int blueL = 0;int redR = 0; int greenR = 0;int blueR = 0; Pixel pixelL = null;Pixel pixelR = null; for(int row = 0;row<height;row++){ for(int col = 0;col<width;col++){ scaleR = (double)col/width;scaleR *= scaleR; scaleL = 1.0 - scaleR;pixelL = left.getPixel(col,row); pixelR = right.getPixel(col,row);redL = pixelL.getColor().getRed(); greenL = pixelL.getColor().getGreen();blueL = pixelL.getColor().getBlue(); redR = pixelR.getColor().getRed();greenR = pixelR.getColor().getGreen(); blueR = pixelR.getColor().getBlue();redL = (int)(redL*scaleL + redR*scaleR); greenL = (int)(greenL*scaleL + greenR*scaleR);blueL = (int)(blueL*scaleL + blueR*scaleR); pixelL.setColor(new Color(redL,greenL,blueL));}//end inner loop }//end outer loop}//end merge //----------------------------------------------------//}//end class Java3030raRunner

Figure 1 - One of two input images.

Input image displayed in a PictureExplorer object.

Figure 2 - The second of two input images.

Input image displayed in a PictureExplorer object.

Figure 3 - Possible output image.

Possible output image.

Figure 4 - Possible output image.

Possible output image.

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: Java3030r Review
  • File: Java3030r.htm
  • Published: 02/18/13

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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

important of enocomic
Adu Reply
what is division of labour
Dennis Reply
division of labour can be defined as the separation of task to individuals in any economic system to specialize on it.
what is demand curve
Victoria Reply
demand curve is a downward sloping economic graph that shows the relationship between the price of product and the quantity of the product demanded.
What is demand
Frank Reply
It refers to the quantity of a commodity purchased in the market at a price and at a point of time.
refers to amount of commodities a consumer is willing and able to buy at particular price within a period of time
It is the ability and willingness a customer buys a product or service at a particular price, place and time while other things remaining constant or the same
In which case is opportunity cost is zero
Francis Reply
where no alternative is available
who is the father of economic
Omar Reply
Adam Smith
Adam Smith
Adam smith
Adam Smith
What is monopoly
Mauthoor Reply
it an economic situation where one individual controls the essential commodities or value product for maximum profit
monopoly is a market situation in which there is only one producer of a good or service which has no close substitutes
is where only one person is solely the price taker
what is Monopoly
Dauda Reply
The word Monopoly is a Latin word. it is the combination of two words-Mono means single and Poly means seller. thus Monopoly means single seller. but this is not the full meaning of Monopoly. Monopoly must produce a product which does not have close substitute in the market.
Monopoly is define as a firm in an industry with very high barriers to entry.
If close substitute is available, Monopoly will be a king without a crown.
what does it array
Cbdishakur Reply
what are the differences between monopoly and.oligopoly
Onome Reply
what are the difference between monopoly and oligopoly
The deference between Monopoly and Oligopoly: Monopoly means:A single-firm-Industry producing and selling a product having no close business and Oligopoly means:A market structure where a few sellers compete with each other and each controls a significant portion of market .
so that the price-output policy one affects the other.
what are difference between physical policy and monotory policy
what is economic
Emakpor Reply
what is economic
the word economic was derived from the Greek word oikos (a house)and mein(to manage) which in effect meant managing a household with the limited funds available 🙂.
good excample about scarsity
An Enquiry into the nature and causes of wealth Nations, this book clearly defined what economic is🙂🙂🙏🙏 thank you...
good example about scarcity: money,time, energy, human or natural resources. Scarcity of resources implies that there supply is very much limited in relation to demand.
equilibrium is a situation in which economic forces such as demand and supply are balanced and in the absence of external influences,the value of economic variables will not change
Onome Reply
marginal cost and marginal revenue is equilibrium .
what is equilibrium
Rodrice Reply
policy prescriptions for unemployment
Jeslyne Reply
Am working on it
what are the factors effecting demand sedule
Kalimu Reply
we should talk about more important topics, you can search it on Google n u will find your answer we should try to focus on how we can improve our society using economics
so good night
Why do people buy more grapes in December than in July?
because at time know money
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