| Re: Printing Graphic or saving graphic [message #53175] |
Fri, 23 March 2007 08:51 |
![Maarten[1] is currently offline](theme/default/images/xoffline.png.pagespeed.ic.XRkd1fkXye.png "Maarten[1] is currently offline")
Maarten[1]
Messages: 176
Registered: November 2005
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Senior Member |
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On Mar 23, 3:03 pm, David Fanning <n...@dfanning.com> wrote:
> rpert...@gmail.com writes:
>> I wrote a program that does some processing to an image, and then
>> makes a histogram. Except I have 20 images to look at and compare
>> their histograms. I can run the program 20 times, however, how do I
>> save or print the histogram so I can compare them?
>
> Well, let me count the ways....
In addition to those: save the arrays with the histograms (by string
them in a higher dimension array, or giving a new name), and plot
those in a single graph, or subtract the images, and look at the
histograms of the differences, or apply some other statistics to the
differrences, or both images (correlation comes to mind). A comparison
of the Fourier transform of the images can be entertaining as well.
Of course all 190 possible pairs of images gives quite a lot of
options, but you have to start somewhere.
Maarten
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| Re: Printing Graphic or saving graphic [message #53179 is a reply to message #53175] |
Fri, 23 March 2007 08:03  |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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rpertaub@gmail.com writes:
> I wrote a program that does some processing to an image, and then
> makes a histogram. Except I have 20 images to look at and compare
> their histograms. I can run the program 20 times, however, how do I
> save or print the histogram so I can compare them?
Well, let me count the ways....
PRINTER device:
IDL> ? PRINTER device
PostScript output:
http://www.dfanning.com/documents/tips.html#PostScript
JPEG, TIFF, PNG, etc., etc.
http://www.dfanning.com/tips/jpeg.html
http://www.dfanning.com/programs/tvread.pro
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")
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