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Re: cgImage in PostScrpt files [message #87258 is a reply to message #87257]

Wed, 22 January 2014 04:03

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

iary writes:

> I'm trying to learn how cgImage works, to include some density plots like this
>
> http://www.idlcoyote.com/gallery/density_plot.png
>
> in my PhD thesis.
>
> Unfortunately, I need the output to be a PS file (not the best choice for cgImage because of the AlphaChannel background, I understood) but I'm not satisfied by its quality.
> For instance, if I simply run this routine
>
> http://www.idlcoyote.com/gallery/density_plot.pro
>
> the output looks OK in graphic window and .png, but in postscript the color-coded "pixels" are somehow "blurred", without sharp edges.
>
> I played a bit with the cgImage keywords (transparent, alphaBackgroundImage, ...) but nothing is changed :(
>
> How may I tackle this problem?

Don't know. It's hard to imagine how blurred pixels in a PostScript file
could be turned into sharp pixels in a PNG file. I guess I'd have to see
some evidence. :-)

Cheers,

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

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[Message index]

		cgImage in PostScrpt files By: iary on Wed, 22 January 2014 02:25
		Re: cgImage in PostScrpt files By: David Fanning on Wed, 22 January 2014 04:03
		Re: cgImage in PostScrpt files By: andeh on Wed, 22 January 2014 04:04
		Re: cgImage in PostScrpt files By: andeh on Wed, 22 January 2014 04:06
		Re: cgImage in PostScrpt files By: David Fanning on Wed, 22 January 2014 04:16
		Re: cgImage in PostScrpt files By: iary on Wed, 22 January 2014 07:19
		Re: cgImage in PostScrpt files By: iary on Wed, 22 January 2014 07:23
		Re: cgImage in PostScrpt files By: Phillip Bitzer on Wed, 22 January 2014 08:08

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