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Learn to write a program to do green-screen processing.

Revised: Sun Apr 03 13:48:44 CDT 2016

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Table of contents

Preface

This module is one of a series of modules designed to teach you about Object-Oriented Programming (OOP) using Java.

The program described in this module requires the use of the Guzdial-Ericson multimedia class library. You will find download, installation, and usageinstructions for the library at Java OOP: The Guzdial-Ericson Multimedia Class Library .

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I recommend that you open another copy of this document in a separate browser window and use the following links to easily find and view the Figuresand Listings while you are reading about them.

Figures

Listings

Preview

n this lesson, you will learn how to write a program to do green-screen processing to superimpose a source image onto a destination image while making the green background of the source image appear to betransparent.

Program specifications

Write a program named Prob03 that uses the class definition shown in Listing 1 and Ericson's media library along with the image files in the following list to produce the five graphic output imagesshown in Figure 1 through Figure 5 .

  • Prob03a.bmp
  • Prob03b.bmp
  • Prob03c.bmp
  • Prob03d.jpg

Figure 1 - Input image file Prob03a.bmp.

Image of a female ice skater facing the camera on a green background

Figure 2 - Input image file Prob03b.bmp.

Image of a female ice skater facing slightly to her left on a green background

Figure 3 - Input image file Prob03c.bmp.

Image of a female ice skater facing slightly to her right on a green background

Figure 4 - Input image file Prob03d.jpg.

Image of a frozen lake with a penguin and some buildings on the far shore.

Figure 5 - Output picture.

Three views of the ice skater on a frozen lake.

New classes

You may define new classes as necessary to cause your program to behave as required, but you may not modify the class definition for the class named Prob03 given in Listing 1 .

Required output text

In addition to the output images mentioned above, your program must display your name and one other line of text on the command-line screen as shown in Figure 6 .

Figure 6 . Required output text.
Display your name here. Picture, filename None height 256 width 344

General background information

This program receives three views of an ice skater in bmp files with a pure green background along with a jpg file containing a snow scene.

All four files show the Alice runtime panel with the words World Running... and several associated buttons. (See Figure 1 .)

Program behavior

The program performs the following actions:

Questions & Answers

Ayele, K., 2003. Introductory Economics, 3rd ed., Addis Ababa.
Widad Reply
can you send the book attached ?
Ariel
?
Ariel
What is economics
Widad Reply
the study of how humans make choices under conditions of scarcity
AI-Robot
U(x,y) = (x×y)1/2 find mu of x for y
Desalegn Reply
U(x,y) = (x×y)1/2 find mu of x for y
Desalegn
what is ecnomics
Jan Reply
this is the study of how the society manages it's scarce resources
Belonwu
what is macroeconomic
John Reply
macroeconomic is the branch of economics which studies actions, scale, activities and behaviour of the aggregate economy as a whole.
husaini
etc
husaini
difference between firm and industry
husaini Reply
what's the difference between a firm and an industry
Abdul
firm is the unit which transform inputs to output where as industry contain combination of firms with similar production 😅😅
Abdulraufu
Suppose the demand function that a firm faces shifted from Qd  120 3P to Qd  90  3P and the supply function has shifted from QS  20  2P to QS 10  2P . a) Find the effect of this change on price and quantity. b) Which of the changes in demand and supply is higher?
Toofiq Reply
explain standard reason why economic is a science
innocent Reply
factors influencing supply
Petrus Reply
what is economic.
Milan Reply
scares means__________________ends resources. unlimited
Jan
economics is a science that studies human behaviour as a relationship b/w ends and scares means which have alternative uses
Jan
calculate the profit maximizing for demand and supply
Zarshad Reply
Why qualify 28 supplies
Milan
what are explicit costs
Nomsa Reply
out-of-pocket costs for a firm, for example, payments for wages and salaries, rent, or materials
AI-Robot
concepts of supply in microeconomics
David Reply
economic overview notes
Amahle Reply
identify a demand and a supply curve
Salome Reply
i don't know
Parul
there's a difference
Aryan
Demand curve shows that how supply and others conditions affect on demand of a particular thing and what percent demand increase whith increase of supply of goods
Israr
Hi Sir please how do u calculate Cross elastic demand and income elastic demand?
Abari
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Source:  OpenStax, Object-oriented programming (oop) with java. OpenStax CNX. Jun 29, 2016 Download for free at https://legacy.cnx.org/content/col11441/1.201
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