<< Chapter < Page
  Digital signal processing - dsp     Page 11 / 24
Chapter >> Page >
Figure 3 . Program output in self-test mode.
Missing Figure.
(Remember, all six output images are displayed on top of one another in the upper-left corner of the screen. You must manually move them tosee all six images.)

A 3D parabola

The main method creates and displays a surface consisting of a 3D parabola. You can think of the surface as representing a one-quartersection of a bowl, or perhaps a satellite dish with the center of the dish in the upper left corner of the image. The top three images in Figure 3 are the images produced from the raw surface. The bottom three images are the imagesproduced by the log of the surface, (which is no longer a 3D parabola) .

The calibration scale

The calibration scale is displayed immediately below the image of each surface.

The images are stacked

When the program is executed, the six surfaces are stacked in the upper left corner of the screen. (You must physically move the images on the top to see the images on the bottom.) The stacking order of the surfaces from bottomto top is based on the values of the display parameter in the order 0, 1, 2, 3, 4, 5.

With and without axes

Some of the surfaces show axes and some do not. This is controlled by the value of the constructor parameter named axis . A true value for axis causes the axes to be drawn.

A window listener

The constructor defines an anonymous inner class WindowListener on the close button on the Frame (the X in the upper right hand corner of the Frame ) . Clicking the close button will terminate the program that uses an object of this class.

Testing

The program was tested using J2SE 8.0 and Win 7. Because the program uses Java features that were introduced in J2SE 5.0, it may not compile successfullywith earlier versions of Java.

The program named ImgMod29

The program named ImgMod29 is rather long, so as usual I will break it down and discuss it in fragments. You can view a complete listing of theprogram in Listing 29 near the end of the module.

The main method

The program consists of a top-level class named ImgMod29 , plus several inner classes. The class includes a main method that is use for self-testing the class. To put things in context, I will beginmy discussion with the main method.

The main method begins in Listing 1 .

Listing 1. Beginning of the main method.
public static void main(String[] args){int numberRows = 59; int numberCols = 59;double[][]data = new double[numberRows][numberCols];int blockSize = 2;

Local variables

The array for the surface elevation data

Listing 1 declares a 2D array of type double to contain the 3D surface elevation data values. This is a square array consisting of 59elevation values on each side. (However, there is no requirement for the surface to be square.)

The blocksize parameter

Listing 1 also defines a value of 2 for the blockSize parameter. This variable will be passed to the constructor for the ImgMod29 class, causing each elevation value to be plotted as a small square of four pixels, two pixels on each side of the square.

(The overall size of the display can be controlled by controlling the size of the array containing the surface elevation values and alsocontrolling the value of blockSize .)

Questions & Answers

how do I set up the problem?
Harshika Reply
what is a solution set?
Harshika
hello, I am happy to help!
Shirley Reply
please can go further on polynomials quadratic
Abdullahi
I need quadratic equation link to Alpa Beta
Abdullahi Reply
find the value of 2x=32
Felix Reply
divide by 2 on each side of the equal sign to solve for x
corri
X=16
Michael
Want to review on complex number 1.What are complex number 2.How to solve complex number problems.
Beyan
use the y -intercept and slope to sketch the graph of the equation y=6x
Only Reply
how do we prove the quadratic formular
Seidu Reply
hello, if you have a question about Algebra 2. I may be able to help. I am an Algebra 2 Teacher
Shirley Reply
thank you help me with how to prove the quadratic equation
Seidu
may God blessed u for that. Please I want u to help me in sets.
Opoku
what is math number
Tric Reply
4
Trista
x-2y+3z=-3 2x-y+z=7 -x+3y-z=6
Sidiki Reply
Need help solving this problem (2/7)^-2
Simone Reply
x+2y-z=7
Sidiki
what is the coefficient of -4×
Mehri Reply
-1
Shedrak
the operation * is x * y =x + y/ 1+(x × y) show if the operation is commutative if x × y is not equal to -1
Alfred Reply
An investment account was opened with an initial deposit of $9,600 and earns 7.4% interest, compounded continuously. How much will the account be worth after 15 years?
Kala Reply
lim x to infinity e^1-e^-1/log(1+x)
given eccentricity and a point find the equiation
Moses Reply
A soccer field is a rectangle 130 meters wide and 110 meters long. The coach asks players to run from one corner to the other corner diagonally across. What is that distance, to the nearest tenths place.
Kimberly Reply
Jeannette has $5 and $10 bills in her wallet. The number of fives is three more than six times the number of tens. Let t represent the number of tens. Write an expression for the number of fives.
August Reply
What is the expressiin for seven less than four times the number of nickels
Leonardo Reply
How do i figure this problem out.
how do you translate this in Algebraic Expressions
linda Reply
why surface tension is zero at critical temperature
Shanjida
I think if critical temperature denote high temperature then a liquid stats boils that time the water stats to evaporate so some moles of h2o to up and due to high temp the bonding break they have low density so it can be a reason
s.
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Digital signal processing - dsp. OpenStax CNX. Jan 06, 2016 Download for free at https://legacy.cnx.org/content/col11642/1.38
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Digital signal processing - dsp' conversation and receive update notifications?

Ask