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How do you use the class?

All that's necessary to use this class to plot your own 3D surfaces is to copy and compile the source code in Listing 29 near the end of this module. Then include a statement similar to the following in your program:

new ImgMod29(data,blockSize,true,0);

The 3D surface data to be plotted

The parameter named data in the above statement is a reference to a 2D array of type double that contains the sampled elevation values of the surface to be plotted.

The granularity of the plot

The second parameter named blockSize specifies the size of one side of a square array of colored pixels in the final plot that willrepresent each elevation point on your 3D surface. Set this to 0 if you are unsure as to what size square you need.

(If you look very carefully, you may be able to see a small white square at the center of the middle image in Figure 1 . This is a nine-pixel square produced by a blockSize value of 3.)

The optional axes

The third parameter specifies whether or not you want to have optional axes drawn on the plot. (See Figure 3 for examples of plots with and without the axes.) A parameter value of true causes the axes to be drawn. A value of false causes the axes to be omitted.

The plotting format

The fourth parameter is an integer that specifies the plotting format as follows:

  • 0 - Grayscale (linear, top-left image in Figure 2 )
  • 1 - Color Shift (linear, top-center image in Figure 2 )
  • 2 - Color Contour (linear, top-right image in Figure 2 )
  • 3 - Grayscale with logarithmic data conversion (bottom-left image in Figure 2 )
  • 4 - Color Shift with logarithmic data conversion (bottom-center image in Figure 2 )
  • 5 - Color Contour with logarithmic data conversion (bottom-right image in Figure 2 )

If you are unsure as to which format would be best for your application, just start with a value of 0. Then try all six formats to see which one worksbest for you.

Extremely simple to use

The class couldn't be simpler to use.

(Your three-minute learning curve has expired. You now know how to use the class to incorporate 3D surface plotting in your Java programs.)

Will use in subsequent modules

This 3D plotting class will be used in numerous future modules involving such complex topics as the use of the 2D Fourier Transform to process images.

If you arrived at this page seeking a free Java program for plotting your 3D surfaces, you are in luck. Just copy the source code for the class in Listing 29 and feel free to use it as described above.

On the other hand, if you would like to learn how the class does what it does, and perhaps use your programming skills to improve it, keep reading.Hopefully, once you have finished the module, you will have learned quite a lot about plotting 3D surfaces using color in Java.

Viewing tip

I recommend that you open another copy of this module 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

  • Figure 1 . 3D views of a wave-number spectrum.
  • Figure 2 . Sample output with logarithmic flattening.
  • Figure 3 . Program output in self-test mode.

Questions & Answers

Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
hi
Loga
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
how did you get the value of 2000N.What calculations are needed to arrive at it
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Source:  OpenStax, Digital signal processing - dsp. OpenStax CNX. Jan 06, 2016 Download for free at https://legacy.cnx.org/content/col11642/1.38
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