Help with baby photo restoration

Fantastic help Kirk! I need to give this a try next weekend.

Personally, I wouldn't use any kind of NR on old photos, they just don't look right without the grain.

Using FFT only on luminance makes sense, because the A and B channels contain almost no detail, and thus are of no use when doing any kind of pattern or noise removal.

Kolor-Pikker wrote in post #14946165
Personally, I wouldn't use any kind of NR on old photos, they just don't look right without the grain.

Agreed.

The demo I did was addressing a Neat Image forum member's desire to filter the image and get rid of the grain as well as the pattern.

Kirk

Nice demo of FFT

For anyone interested in ImageJ -there is a plug-in available that permits you to load raw files directly into ImageJ via dcraw:

http://sourceforge.net …j-plugins/files/ij-dcraw/

kirk

great info, thanks!

Kolor-Pikker wrote in post #14946165
Personally, I wouldn't use any kind of NR on old photos, they just don't look right without the grain.

Using FFT only on luminance makes sense, because the A and B channels contain almost no detail, and thus are of no use when doing any kind of pattern or noise removal.

I don't use noise reduction for scans of prints, but I do need to do a small amount for film scans using my Nikon Super Coolscan 5000ED. The scanned negs have grain that is more noticeable than when I viewed the same negative with my enlarger and a focus finder. It could be due to the digital scanning, but I'm also certain that some of my older negatives have deteriorated making the grain more coarse.

I'm not interested in obliterating grain, because you also lose detail, I just want to get a final result that closely mimics what I saw in the darkroom when the negatives were originally processed (some are 30-40 years old).

This is such an awesome thread. So much useful information. I wish this thread had a sticky flag attached to it.

This technique could also be used to eliminate the low ISO 100 pattern noise that is visible when recovering detail in the shadows of an image that has high dynamic range.

Wow amazing. THis needs to be stickied. Not the other blah things.

a big up for this awesome thread

Here's another great thread on the same subject:

https://photography-on-the.net/forum/showthre​ad.php?t=525681

I asked Kirkt if he could write a tutorial for how to remove the pattern noise from the boosted shadows of an image using this same technique. It's a little different, but basically the same concept.

Looks like I have to get my act together and write something up!

Kirk