comp.lang.idl-pvwave archive: archive » Re: Reading 32-bit BMP (with an alpha channel) in IDL

Home » Public Forums » archive » Re: Reading 32-bit BMP (with an alpha channel) in IDL

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Reading 32-bit BMP (with an alpha channel) in IDL [message #70026 is a reply to message #70023]

Tue, 09 March 2010 11:28

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Brian Daniel writes:

> I have a set of BMP images I need to read in. They have 4 channels,
> red, green, blue and alpha. Every commercial image viewer I have can
> open them, including matlab. Now, I could go to the trouble to
> convert them to 24-bit or another image format, but why should I
> change? IDL should be able to read this standard input. Read_bmp.pro
> explicitly states that it can only read 24-bit. Is there something
> built-in I'm not seeing? Is there a coyote function that already does
> it?

Here is an article that explains what is happening:

http://www.dfanning.com/ip_tips/transparentpng.html

TVImage will display these images correctly. :-)

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thue. ("Perhaps thos speakest truth.")

Report message to a moderator

[Message index]

		Re: Reading 32-bit BMP (with an alpha channel) in IDL By: penteado on Tue, 09 March 2010 14:58
		Re: Reading 32-bit BMP (with an alpha channel) in IDL By: Brian Daniel on Tue, 09 March 2010 14:09
		Re: Reading 32-bit BMP (with an alpha channel) in IDL By: David Fanning on Tue, 09 March 2010 11:28

Previous Topic:	Re: Dynamic arrays in structs: re-allocation problem
Next Topic:	Creating a widget for probability table

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Oct 10 02:09:26 PDT 2025

Total time taken to generate the page: 1.20109 seconds