How do I fix asymmetrical vignette?

Any suggestions on how to fix asymmetrical vignette?

I have scanned my father's old Kodachrome slide collection dating back to 1951. Most of the pictures were taken with an old Argus C-3 on which he always had a UV filter with a thick rim. As a result, almost every picture shows a significant vignette. The problem is that it is not symmetrical. It is noticeably heavier in the upper-right of the picture than in the upper-left. No setting of 'Filter / Distort / Lens Correction / Vignette' will fix the problem.

Any suggestions short of cropping off the right side of the picture?

Thanks, Gary

On Wed, 05 Nov 2008 14:12:45 -0800, Gary Edstrom wrote:

[re asymetrical vignetting]

than in the upper-left. No setting of 'Filter / Distort / Lens Correction / Vignette' will fix the problem.

Any suggestions short of cropping off the right side of the picture?
Thanks, Gary

Make the canvas slightly larger to center the vignette, then use the Lens Correction filter to fix it.

Or use the Overlay trick - fill a layer with radial gradient that is RGB(128,128,128) in the center and gets brighter toward the edges, positioned to match the vignette. Then use levels to fine tune the gradient. Or airbrush it out by hand.

Save this layer by itself in a file, and make an action (attached to a function key) that loads the layer and flattens the image.

--
Mike Russell - http://www.curvemeister.com

On Wed, 5 Nov 2008 16:30:02 -0800, Mike Russell
wrote:

On Wed, 05 Nov 2008 14:12:45 -0800, Gary Edstrom wrote:

[re asymetrical vignetting]

than in the upper-left. No setting of 'Filter / Distort / Lens Correction / Vignette' will fix the problem.

Any suggestions short of cropping off the right side of the picture?
Thanks, Gary

Make the canvas slightly larger to center the vignette, then use the Lens Correction filter to fix it.

Or use the Overlay trick - fill a layer with radial gradient that is RGB(128,128,128) in the center and gets brighter toward the edges, positioned to match the vignette. Then use levels to fine tune the gradient. Or airbrush it out by hand.

Save this layer by itself in a file, and make an action (attached to a function key) that loads the layer and flattens the image.

Thanks for the suggestion...I'll give it a try.

Gary

Mike Russell wrote:

Save this layer by itself in a file, and make an action (attached to a function key) that loads the layer and flattens the image.

I was going to ask if the vignette is in the same position in every image. If so, this is a great suggestion

On Thu, 6 Nov 2008 10:36:52 -0000, "\(used to be\) Fat Sam" wrote:

Mike Russell wrote:

Save this layer by itself in a file, and make an action (attached to a function key) that loads the layer and flattens the image.

I was going to ask if the vignette is in the same position in every image. If so, this is a great suggestion

Thanks for the additional suggestion, Gary