Anyway I'll run through what I'm doing.
First of all I'll use this negative:
obtained from here:
http://www.adcom.bg/Web/Software/LaserS ... %205_5.htm
first step is just to invert it using the invert function:
Then I go to the levels function and look at the histogram
- first thing to do is to switch the channel from rgb to red:
Then I slide the upper and lower triangles into where the histogram is. This has the effect of finding the upper and lower red values in the scan and mapping them across to the max values possible:
*I should mention too that I'm moving it past the flat black portions of the histograms - I read somewhere that this is just noise - it may or may not be, so try either way and see what works the best.
I then move the middle slider a little to the left or right till the contrast looks alright (highly subjective) - and thisparticular one didn't need to much of a change:
I then REPEAT THESE STEPS for the green and blue channel, and then switch to the RGB channel:
Then I move the middle slider only and get the contrast looking good:
This still didn't seem quite right so I went to the curves function and gave it that classic s-bend that film has:
Slightly larger, this is what it looks like so far:
The greens seem a little over satuarated - especially when compared to the corrected original on their page:
So I desaturated the greens:
Which gave this end result:
- which I'm pretty pleased with, and I think it's even better than their example - note the detail in the print on her top above, which is almost blown out in their example below
Anyway - thought I'd share -- Paul why don't you post the original negatives of the pics you were working on so I can try this on them.
Are there any equivalent histogram based filters for Virtualdub that anyone knows of?
Scot
