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Re: color problem when capture the object window [message #38592 is a reply to message #38560]

Fri, 12 March 2004 09:20

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Songtao Liu writes:

> I write the captured screen images to a bmp file and when I look at
> the bmp file, I found the color is not what it looks like on the
> screen.
>
> It is just a simple widget program, with several object graphic
> windows, each display an image and ROIs(draw with plot object).
>
> Followings are the codes to capture the screen display and write them
> to the disk
>
> ;capture the window display
> draw_id -> getProperty, image_data = data
> ;write to file
> write_bmp, filename, data

Oh, right. For some reason, when you create 24-bit color BMP
files, Microsoft wants them in the form of BGR rather than RGB.
(Don't ask me, I don't have the foggiest idea.)

So just flip your red and blue image planes and you will
be good to go. I typically avoid this problem by writing
8-bit BMP files with color tables. See my XImage program,
for example.

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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[Message index]

		Re: color problem when capture the object window By: lius02 on Mon, 15 March 2004 09:00
		Re: color problem when capture the object window By: David Fanning on Fri, 12 March 2004 09:20
		Re: color problem when capture the object window By: lius02 on Fri, 12 March 2004 08:44
		Re: color problem when capture the object window By: David Fanning on Thu, 11 March 2004 14:40

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