## Add an image in graph...

how we insert an image in ploted graph in maple?????

## conformal maps for image distortion...

I am interested in using conformal maps for image distortion. How can this be made in Maple (an analogy to the ImageForwardTransformation[] in Mathematica, see http://community.wolfram.com/groups/-/m/t/854405?p_p_auth=TLh6kMXL). Thanks!

## Image repairing ...

I came across this interesting image restoration in the Mathematica community http://community.wolfram.com/groups/-/m/t/873396 and wondered how this could be applied in Maple.

## How to do a color inversion in maple...

How can I do a color inversion on a jpg image in Maple?

## The image of a sphere with a cutaway

by:

This post is related to the question. There were  proposed two ways of finding the volume of the cutted part of a sphere in the form of a wedge.  Here the procedure is presented that shows the rest of the sphere. Parameters procedure: R - radius of the sphere, H1 - the distance the first cutting plane to the plane  xOy,  H2 -  the distance the second cutting plane to the plane  zOy. Necessary conditions:  R>0,  H1>=0,  H2>=0,  H1^2+H2^2<R^2 . For clarity, different surfaces are painted in different colors.

restart;

Pic := proc (R::positive, H1::nonnegative, H2::nonnegative)

local A, B, C, E, F;

if R^2 <= H1^2+H2^2 then error "Should be H1^(2)+H2^(2)<R^(2)" end if;

A := plot3d([R*sin(theta)*cos(phi), R*sin(theta)*sin(phi), R*cos(theta)], phi = arctan(sqrt(-H1^2-H2^2+R^2), H2) .. 2*Pi-arctan(sqrt(-H1^2-H2^2+R^2), H2), theta = 0 .. Pi, color = green);

B := plot3d([R*sin(theta)*cos(phi), R*sin(theta)*sin(phi), R*cos(theta)], phi = -arctan(sqrt(-H1^2-H2^2+R^2), H2) .. arctan(sqrt(-H1^2-H2^2+R^2), H2), theta = 0 .. arccos(sqrt(R^2-H2^2-H2^2*tan(phi)^2)/R), color = green);

C := plot3d([R*sin(theta)*cos(phi), R*sin(theta)*sin(phi), R*cos(theta)], phi = -arctan(sqrt(-H1^2-H2^2+R^2), H2) .. arctan(sqrt(-H1^2-H2^2+R^2), H2), theta = arccos(H1/R) .. Pi, color = green);

E := plot3d([r*cos(phi), r*sin(phi), H1], phi = -arccos(H2/sqrt(R^2-H1^2)) .. arccos(H2/sqrt(R^2-H1^2)), r = H2/cos(phi) .. sqrt(R^2-H1^2), color = blue);

F := plot3d([H2, r*cos(phi), r*sin(phi)], phi = arccos(sqrt(-H1^2-H2^2+R^2)/sqrt(R^2-H2^2)) .. Pi-arccos(sqrt(-H1^2-H2^2+R^2)/sqrt(R^2-H2^2)), r = H1/sin(phi) .. sqrt(R^2-H2^2), color = gold);

plots[display](A, B, C, E, F, axes = none, view = [-1.5 .. 1.5, -1.5 .. 1.5, -1.5 .. 1.5], scaling = constrained, lightmodel = light4, orientation = [60, 80]);

end proc:

Example of use:

Pic(1,  0.5,  0.3);

## Populating a possible game result matrix...

Hello,

I'm trying to define a matrix that will have all the possible game results in a 9 team competition in one round. The results are a column in the form [game 1 home team, game 1 away team, game 2 home team, ... , game 9 away team]

This should give me a matrix with 18 rows, and 512 columns, where each column is a possible game result.

In essense, to continue the pattern of this matrix on for all 512 columns.

I've fiddled with for statements, but it ends up getting very messy given the number of nests that are required.

Thoughts? Any help would be much appreciated,

Thanks, Alex, Australia.

## Empty space under images in document mode?...

Hi!

Is there any way to remove the empty space that comes under images when printing the project, while using document mode?

Regards

Nicolai

## Is there a way to export high quality images from ...

Hi every one.

I want to export some plots from maple as images in ".jpg" or ".png" formats. I was wondering that is there a way to specify the resolution of the exported pictures? I need high quality pics.

## Pull out text in an image...

I came across this website www.fuelsonline.ca that has their price for furnace oil and Propane.  I thought it would be fairly easy using HTTP[Get] to fish out the prices, but it turns out those values on the page are images in of course a format (PNG) that cannot be read by Maple.  I don't know where that web page is pulling the prices from but it looks like web surgery with Maple will be unable to (at least not easily) wean the numbers out.

If anyone has any ideas I would be interested in knowing.

## How can I plot a shaded circular segment using Map...

"Circular segment" is the unfortunate but standard term for the region between a chord and an arc of a circle sharing the same endpoints (see http://en.wikipedia.org/wiki/Circular_segment).  I say "unfortunate" because the phrase suggests a line segment when it actually means a planar region.

I would like to plot a shaded circular segment using Maple17.  I want the endpoints of the chord & arc to be anything I please, so the chord is not necessarily horizontal, or vertical, or the diameter of the circle, etc.

At the URL

http://www.mapleprimes.com/questions/139057-Segment-Of-A-Circle

there is an image containing a shaded circular segment, but I don't see what code produced the image.  The image there includes a horizontal chord, and I don't know if the code used to produce that image can be adapted for chords that are not horizontal.

If I have to, I can plot a shaded polygon with a huge number of sides that is indistinguishable from a circular segment.  I have plotted polygons before.  But it would obviously be preferable to plot a shaded circular segment.

If there a way to plot two curves of the form r = f(theta) and shade the region between them?  This would be better than the huge-polygon approach, but not as good as a simple command for plotting a shaded circular segment, if such a command exists.

## Is there any way to make Maple produce an image of...

I am trying to use Maple to produce an image that will be part of a math paper.  The final image must be in .eps format.  Whenever I produce a plot in Maple17 and click on it, it looks like the image has the shape of a square (regardless of what's inside it), perhaps with a lot of empty space.  I want an image without a lot of empty space, and I'd like Maple to do this.  If I crop a square image using some other application, it is not going to improve the quality of the image and might hurt it.

If the answer to question in the Title is "no", can anyone suggest a good way to produce a good .eps image from a Maple plot that is cropped properly to eliminate as much empty space as possible?  I have Photoshop, but I don't know if this is the best way to go.

I wrote a toy file that plots a simple curve.  I'll upload it and provide a link to it.  If you execute the code and click on the image, you'll see that it is a square with a lot of empty space.

Nov122013.mw

 > restart:
 > with(plots):
 > p1:=plot(x^2,x=0..1,scaling=constrained,view=[-4..5,-1..3]):
 > display(p1);
 >
 >

## plotting faster intensity levels in an image...

Is there another way to plot 3d intensity levels in an image?  Using matrixplot takes a long time.

restart;gc():
with(ImageTools):
with(plots):

b:=convert(ToGrayscale(a),Array):
c:=convert(b,Matrix):

## complexplot, 1 million points...

I'm having problems using the complexplot command in Maple 16 with over 1 million points. I really want to plot the points - I don't want an approximation. I noticed some strange things with the list/table carrying my complex points. If I ask for individual values, like T[20], it won't give the correct value, but if I ask for a range, like T[1..20], it will display the correct values.

I get an error when trying to use complexplot saying either invalid range, if I don't...

## What is Wrong with Pasting an Image from Preview t...

System: Mac OS X 10.8.1 + Maple 16

I am trying to copy + paste a selected region from an image shown in Preview to Maple. The image is blank when it is pasted. Why is this not working as expected?

--
Chemistry / Chemical & Materials Engineering
UAHuntsville