MaplePrimes - answers and comments on Question, How to import a photo to Maple

?ImageTools

gkokovidis — Wed, 06 Apr 2011 06:10:43 Z

On a Windows XP machine, with your filename saved on the Desktop, the following will work. You have to modify the path to match your exact path.

Download ImageRead.mw

Regards,

Georgios Kokovidis

Dräger Medical

Thanks a lot

Rasmus Dahl — Thu, 07 Apr 2011 00:54:51 Z

Hi Georgios

Thanks a lot for your advice. Now I've imported a black/white photo of a the diffraction pattern from a circular aperture and I want to make a 3D-graph that represent the intensity of the pattern. I've saved the photo as "airyimg" in maple.

My first idea was to use the command "pointplot3d" to make the graph, so I've made the following sequence to calculate the intensity to every pixel:

[seq](seq([j, n, airyimg(j, n)], n = 1 .. 200), j = 1 .. 200)

For some reasons this sequence only gives a small part of the entire picture. In fact I've found out that;

airyimg(j,n)

sometimes returns values for negative integers. And the setup:

> l1 := ([seq])(seq([j, n, airyimg(j, n)], n = -600 .. -1), j = -200 .. -1);
> l2 := ([seq])(seq([j, n, airyimg(j, n)], n = 1 .. 600), j = 1 .. 200);
> l3 := [l1[], l2[]];
> pointplot3d(%, axes = boxed);

gives two strange-scaled diffraction patterns in the same plot.

Hope you can help me.

Rasmus

Application Center

gkokovidis — Thu, 07 Apr 2011 04:35:20 Z

The following worksheet is from the Maple Portal. You might find it useful.

Regards,

Georgios Kokovidis

Dräger Medical