Amp Noise

hejjafish

Tried a search with no luck.

Is there a way to get rid of amp noise in pp without cropping?
I have amp noise in the two corners on a couple long exposures.

pathfinder

One simple way is to take a series of 5 to 10 images with shorter exposures, using a higher ISO, and then merge them in the Layers Palette.

The noise is random, and hence tends to cancel each other out, while the subject material is not random, and does not get lost when the layers are blended together.

I believe this technique is done frequently by astro-photographers. You may find some information about merging multiple frames ( not as a pano ) in the star shooters websites..

hejjafish

Thanks Pathfinder

I did come across this technique in my searching but I was looking for a solution to remove it from an existing photo.

See bottom left corner:


It kinda blends ok in this, but is still bothersome.
Is there a way to get rid of this without cropping it out?

jfriend

hejjafish wrote:

Thanks Pathfinder

I did come across this technique in my searching but I was looking for a solution to remove it from an existing photo.

See bottom left corner:


It kinda blends ok in this, but is still bothersome.
Is there a way to get rid of this without cropping it out?

A curve on the blue channel with a mask to make a greater effect in the lower left corner:

hejjafish

Thanks
John,

Thank You for your input.
...I guess I'd better learn to mask.