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A calibration scale

Each of the images in Figure 1 shows a calibration scale immediately below the image of the surface. The calibration scale shows the color or shade of grayused to represent each elevation on the surface. The color or shade of the lowest elevation is shown on the left of the scale and the color or shade of thehighest elevation is shown on the right.

For example, the scale on the Grayscale image shows a smooth gradient from black to white going from left to right. The shade of gray shown at the midpointon the calibration scale represents the elevation that is halfway between the lowest elevation and the highest elevation.

Color Shift plot

The image in the center in Figure 1 shows the same surface plotted using a smooth gradient from blue at the low end through aqua, green, and yellow to redat the high end. In addition, this plotting format sets the lowest elevation to black and the highest elevation to white so that these two elevations areobvious in the plot.

(The highest elevation was indicated by a small white square at the center in the original program output, and the lowest elevations wereindicated by the black areas near the corners. However, the small white square seems to have faded away in the published version of this plot.)

More information is conveyed

This plotting format can convey a great deal more information to a human observer than the Grayscale plotting format. This is because the human eye candiscern more different colors than it can discern different shades of gray.

(Many years ago, when I was in the SONAR business, the general rule of thumb was that a typical human can discern only about seven shades ofgray from black to white inclusive. Obviously a typical human can discern more than seven different colors.)

The lowest elevations are obvious in the color shift plot

By using black to indicate the lowest elevation, (in addition to using shades of blue to indicate low elevations) , it is easy to determine the exact locations of the lowest elevations in the Color Shift plot in the centerof Figure 1 . On the other hand, the locations of the lowest elevations are not discernable in the Grayscale plot at the left Figure 1 .

Four minor peaks are obvious in the color shift plot

Also, it is obvious from the Color Shift plot that the surface has four minor peaks at the edges of the plot. Although the Grayscale plot has a slight hint ofthose minor peaks, they are certainly not obvious.

By comparing the color at the top of the minor peaks to the color scale below the Color Shift surface, it is possible to estimate that the elevation of theminor peaks is probably somewhere between twenty-five and fifty percent of the elevation of the main central peak. It is clearly impossible to glean that kindof information from the Grayscale plot of the same surface.

The highest elevation is obvious in the color shift plot

Although no longer true in this reproduction of the original computer output, by using white to indicate the highest elevation (in addition to using shades of red to indicate high elevations) , it is easy to determine the exact location of the highest elevation in the Color Shift plot. As explainedearlier, the highest elevation was indicated by a small white square, which was on the cross hairs at the center of the original plot.

Questions & Answers

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
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
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
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
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
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
what is biological synthesis of nanoparticles
Sanket Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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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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