RE: [APML] Anti-vignetting in PS 7

["Greg Hartke" <ghartke@adelphia.net>]

I knew it was a "duh". In fact, as I was hitting "Send" for the original
message, I realized I hadn't explicitly checked the image sizes to make sure
they were consistent. As it turns out, they original is incorrect by 1 pixel
in width. Can't figure out how I managed to do that but it's easy enough to
redo it. Thanks, Scott. It doesn't hurt to get egg on your face once in a
while as a reminder that we're all human.

Regards,

Greg

-----Original Message-----
From: astro-photo-bounces@seds.org
[mailto:astro-photo-bounces@seds.org]On Behalf Of R. Scott Ireland
Sent: Monday, December 27, 2004 1:43 PM
To: Discussion of Film Astrophotography
Subject: RE: [APML] Anti-vignetting in PS 7

> At this point, I converted the blurred mask and the original
> image to 8 bits
> per channel so I could use "Apply Image" to subtract the mask
> (with offset)
> from the original. I made the original image active and clicked "Image" ->
> "Apply Image". This brings up a dialog box with a few options. The first
> thing to do was to change the "Source" to the blurred mask with the target
> as the original image. The problem is that the "Source" is the original
> image and I can't seem to change it to the blurred mask. The
> drop-down menu
> contains nothing but the original and I can't even type in the name of the
> mask.

Both files have to have exactly the same pixel dimensions for Apply Image to
work. I'll bet that "down and then re-up sized" mask does not have the same
pixel dimensions as the image.

Scott

R. Scott Ireland
ireland@gate.net
www.rsiphotos.com

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