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Listings

  • Listing 1 . Beginning of the main method.
  • Listing 2 . A 3D parabolic surface,
  • Listing 3 . Display six surface images.
  • Listing 4 . Beginning of the ImgMod29 class.
  • Listing 5 . Establish display format for log conversion.
  • Listing 6 . Copy the input elevation data.
  • Listing 7 . Convert to log data if required
  • Listing 8 . Normalize the surface elevation data.
  • Listing 9 . The method named scaleTheSurfaceData.
  • Listing 10 . Create an appropriate pair of Canvas objects.
  • Listing 11 . Add the Canvas objects to the Frame.
  • Listing 12 . Register an anonymous WindowListener object.
  • Listing 13 . The method named getCenter.
  • Listing 14 . Beginning of the class named CanvasType0surface.
  • Listing 15 . Beginning of overridden paint method.
  • Listing 16 . Instantiate a Color object.
  • Listing 17 . Set colors and draw squares.
  • Listing 18 . Draw the optional red axes.
  • Listing 19 . Beginning of the class named CanvasType0scale .
  • Listing 20 . The overridden paint method.
  • Listing 21 . Beginning of the class named CanvasType1surface.
  • Listing 22 . Beginning of the overridden paint method.
  • Listing 23 . Set white and black for max and min values.
  • Listing 24 . Process elevations from 1 to 63 inclusive.
  • Listing 25 . Processing the other three ranges.
  • Listing 26 . The method named getColorPalette.
  • Listing 27 . Beginning of overridden paint method.
  • Listing 28 . Set the color value.
  • Listing 29 . Source code for ImgMod29.java.

General Discussion

Displaying 3D data can be fairly difficult

One of the more difficult aspects of engineering and scientific computing is displaying three-dimensional (3D) surfaces in ways that are meaningful to persons who need to view and to analyze those surfaces. The basic problem isthat it is necessary to display the 3D surface on a 2D media, such as a computer screen.

(At least that was true before the advent of 3D printers. However, as of October 2015, a 3D printer is not readily available for routine use by most people.)

Therefore, some compromise is always required.

Different approaches are available

Various approaches have been devised for accomplishing this objective including:

A 3D plotting program

I will provide and explain a program in this module that makes it very easy to display a 3D surface as a Grayscale plot, a Color Shift plot, or a ColorContour plot. The program supports six different plotting formats. Three of those plotting formats are illustrated in Figure 1 .

(The images shown in Figure 1 are different views of the wave-number spectrum resulting from performing a 2D Fourier Transform on a box in thespace domain. The use of 2D Fourier Transforms will be the main topic of a future module.)

Figure 1. 3D views of a wave-number spectrum.
Missing Figure.

Figure 1 shows the same 3D surface plotted using three different plotting formats. Going from left to right, Figure 1 shows:

  • Grayscale plot
  • Color Shift plot
  • Color Contour plot

Grayscale plot

The plot on the left in Figure 1 is the old standby method in which the elevation of each point on the surface is represented by a shade of gray withthe highest elevation being white and the lowest elevation being black.

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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