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The end of the darkenBackground method

Listing 7 signals the end of the processing loop and the end of the darkenBackground method.

Apply a red tint to the skater

Returning to where we left off in the run method in Listing 4 , the code in Listing 8 calls a method named redTint , passing a reference to the picture that contains a cropped image of the skater. The method applies a red tint to theskater.

Listing 8 - Apply a red tint to the skater.
redTint(skater);

The redTint method assumes that the image being processed has a pure green background like that shown in Figure 1 . The method applies an algorithm very similar to that shown in Listing 7 to apply a red tint to every pixel that is not pure green.

Because of the similarity of the code in the redTint method and the code in Listing 7 , a detailed explanation of the redTint method should not be required. You can view the method in its entirety in Listing 10 near the end of the module.

The skater with the red tint applied

If you were to display the picture referred to by skater immediately after the redTint method returns in Listing 8 , you would see the image shown in Figure 7 .

Figure 7 - The skater with a red tint applied.

The ice skater with a red tint applied.

Compare Figure 7 with Figure 1

You can see the effect of applying the red tint process to the skater by comparing Figure 7 with Figure 1 . Note that the process does not change the color of the green pixels.

The remainder of the run method

Continuing with the run method, Listing 9 calls a method named greenScreenDraw to draw the cropped, red-tinted skater on the snow scene as shown in Figure 4 .

Listing 9 - The remainder of the run method.
//Draw the skater on the snowScene. greenScreenDraw(skater,snowScene,0,0);//Display students name on the final output and // display it.snowScene.addMessage("Display your name here.",10,15); snowScene.explore();System.out.println(snowScene); }//end run method

Behavior of the method

The greenScreenDraw method copies all non-green pixels from a source image to a destination image at a specified location. This method is verysimilar to methods that I have explained in earlier modules. Therefore, an explanation of the method in this module should not be needed.

You can view the greenScreenDraw method in its entirety in Listing 10 near the end of the module.

Add text and display the final output image

When the greenScreenDraw method returns, Listing 9 calls the addMessage method to display the student's name on the snow scene and then calls the explore method to produce the output image shown in Figure 4 . None of that should be new to you at this point.

Display text and return

Finally, Listing 9 displays some information on the command line screen as shown in Figure 5 and returns control to the main method in Listing 1 .

Terminate the program

Having nothing more to do, the main method terminates, causing the program to terminate and return control to the operating system.

Run the program

I encourage you to copy the code from Listing 10 . Compile the code and execute it. Experiment with the code, making changes, and observing the resultsof your changes. Make certain that you can explain why your changes behave as they do.

Questions & Answers

what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
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
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
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it is a goid question and i want to know the answer as well
Maciej
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Abigail
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Anassong
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 ?
s.
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.
Tarell
what is the actual application of fullerenes nowadays?
Damian
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.
Tarell
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.
Virgil
is Bucky paper clear?
CYNTHIA
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.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
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Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
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Cied
types of nano material
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I start with an easy one. carbon nanotubes woven into a long filament like a string
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Porter
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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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