| Re: ENVI ROI colors [message #64522] |
Wed, 07 January 2009 05:10  |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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mort canty writes:
> With
>
> ENVI_GET_ROI_INFORMATION, ROI_IDS, ROI_COLORS=ROI_COLORS
>
> I can determine the colors used for the defined ROIs. The ENVI Help says:
>
> ROI_COLORS (optional)
> Use this keyword to specify a named variable that contains the RGB color
> value for each ROI ID. ROI_COLORS is a byte array of size [3, #ROI IDs].
>
> Great, so ROI_COLORS is an array of RGB values. But I want now to create
> new ROIs using the same colors, so I use
>
> ROI_ID = ENVI_CREATE_ROI(COLOR=COLOR, etc.)
>
> Now the ENVI Help says
>
> COLOR (optional)
> Use this keyword to specify the graphics color index of the ROI. The
> default value is 2.
>
> and I'm lost. How do I get the index of ROI_COLORS to pass to
> ENVI_CREATE_ROI()?
This is all explained in Catch-22 by Joseph Heller:
http://tinyurl.com/84m7x7
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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| Re: ENVI ROI colors [message #64619 is a reply to message #64522] |
Wed, 07 January 2009 05:22  |
Mort Canty
Messages: 134
Registered: March 2003
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Senior Member |
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David Fanning schrieb:
>> and I'm lost. How do I get the index of ROI_COLORS to pass to
>> ENVI_CREATE_ROI()?
>
> This is all explained in Catch-22 by Joseph Heller:
>
> http://tinyurl.com/84m7x7
>
> Cheers,
>
> David
Thanks, Yosarian. I'll link it to my online help :-)
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