So, after having a relatively successful run with the filter, I’ve been having trouble with a few scratched negs. The issue seems to stem from the fact that my scanner has a LOT of overlap between the IR and cyan in a negative image.
After playing around with numbers in the filter and not having much luck, I found this previous post on the forum that I assume is referring to the technique described in this paper linked from this stack exchange post. Whew, that was a lot of hyperlinks. To paraphrase the SE post:
The idea is to remove the shadow of the color information from the infrared image by using the red/cyan channel (the one with the wavelength closest to IR, depending on whether the image is inverted)
Any thoughts on perhaps using a similar technique in this filter?
Filebin | 94ru9yhnxrxow3of <-an example of a sad, scratched image with a naff IR layer.