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Re: PNGs with alpha channel? [message #33832 is a reply to message #33829]

Fri, 31 January 2003 22:40

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Paul Woodford (cpwoodford@spamcop.net) writes:

> Can IDL read and/or write PNGs with an alpha channel?

It would appear so in IDL 5.6, at least.

> I've tried
> reading a PNG that I believe has an alpha channel using IDL 5.4, but I
> do not see the alpha channel.

What do you mean by "do not see" it? It doesn't
have a fourth dimension, or you can't get the alpha
channel to do anything? What are you trying to do
with the alpha channel?

Cheers,

David

--
David W. Fanning, Ph.D.
Fanning Software Consulting, Inc.
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155

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[Message index]

		Re: PNGs with alpha channel? By: Rick Towler on Mon, 03 February 2003 16:01
		Re: PNGs with alpha channel? By: Paul Woodford on Sun, 02 February 2003 12:49
		Re: PNGs with alpha channel? By: David Fanning on Fri, 31 January 2003 22:40
		Re: PNGs with alpha channel? By: Paul Woodford on Tue, 04 February 2003 20:35

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