| New procedure to save image files [message #16540] |
Tue, 03 August 1999 00:00  |
Liam Gumley
Messages: 473
Registered: November 1994
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Senior Member |
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I finally decided I was tired of the usual process involved in saving
the contents of the current graphics window to an image file (GIF or
JPEG for example). These days IDL users are just as likely to have a
24-bit display as an 8-bit display, and thus you run into cases where a
24-bit image is displayed on-screen, but you want to save it as an 8-bit
image (e.g. GIF). Likewise, there are times when an 8-bit image is
displayed on-screen, but you want to save it as 24-bit (e.g. JPEG).
To get around all the headaches involved in this process, I wrote a
procedure named SAVEIMAGE which determines whether you are running IDL
in 8-bit or 24-bit mode, and automatically does any conversions
necessary to save 8-bit or 24-bit output. The following output formats
are supported:
8-bit: GIF (default), BMP
24-bit: JPEG, TIFF
Using the procedure is as simple as
IDL> saveimage, 'test.gif'
You can find the source at
http://cimss.ssec.wisc.edu/~gumley/imagetools.html
Please let me know if you have any problems.
Cheers,
Liam.
--
Liam E. Gumley
Space Science and Engineering Center, UW-Madison
http://cimss.ssec.wisc.edu/~gumley
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| Re: New procedure to save image files [message #16627 is a reply to message #16540] |
Wed, 04 August 1999 00:00  |
Liam Gumley
Messages: 473
Registered: November 1994
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Senior Member |
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"Eric E. Dors" wrote:
> I think that your saveimage routine is great!!! One comment:
> I think that image dithering would be better as an command line
> parameter instead of being hard-coded into your call to color_quan.
Done. See the updated version at
http://cimss.ssec.wisc.edu/~gumley/imagetools.html
I also added a check for IDL 5.1 or higher, which is required to allow
the statement
DEVICE, GET_VISUAL_DEPTH=DEPTH
which determines whether the current IDL session is in 8-bit or 24-bit
mode.
> thanks a lot for posting this routine,
No worries.
--
Liam E. Gumley
Space Science and Engineering Center, UW-Madison
http://cimss.ssec.wisc.edu/~gumley
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