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Color damaged scans
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PostPosted: Sat Feb 19, 2011 2:50 pm    Post subject: Color damaged scans Reply with quote
Hello , friends !
Some time ago I received the Minolta Dimage Scan III (without ICE - shit !!! Laughing ) and began to scan my color negatives .I had the bad surprise that some films exposed in 1996 in a trip in Germany (don't remember the camera ,it was a compact anyway)have a magenta cast ,but not on all the surface of the frame , but like this:


any ideas how to fix that ?
all the other films are ok , scanned on the DS Dual 3 scanning program. I tried vith Vuescan trial version , doesn't help !

Last edited by yinyangbt on Sat Feb 19, 2011 3:06 pm; edited 1 time in total


PostPosted: Sat Feb 19, 2011 2:56 pm    Post subject: Reply with quote
Do you see this on the negative? or it's something with the film holder or scanner.


PostPosted: Sat Feb 19, 2011 3:08 pm    Post subject: Reply with quote
std wrote:
Do you see this on the negative? or it's something with the film holder or scanner.

nope, the scanner is OK .All the other color 150 negs scanned , are fine


PostPosted: Sat Feb 19, 2011 3:25 pm    Post subject: Reply with quote
i like this magenta look, though it feels like from the 60-70's


PostPosted: Sun Feb 20, 2011 1:44 pm    Post subject: Reply with quote
I don't know what tool you're using. In "the Gimp" is available a "select by color" tool. I would play with that to select the affected areas and then try to fix translating to left the green channel curve on the color curves tool.
With the film itself I think there's nothing to do anymore. A discoloration has probably started due to poor processing issues. Storage conditions may also have contributed, if you are sure you've done it properly then you're ok. Otherwise, somewhere in time, is possible that the other negs will start to go too.

Cheers, M.


PostPosted: Sun Feb 20, 2011 2:15 pm    Post subject: Reply with quote
marty wrote:
I don't know what tool you're using. In "the Gimp" is available a "select by color" tool. I would play with that to select the affected areas and then try to fix translating to left the green channel curve on the color curves tool.


Yep, Gimp in fact gives several ways to fix the magenta cast.


Here is the result if you use the "Color Balance" tool, and drag the Cyan/Red slider toward Cyan.



... and here is the result of taking the Levels tool, selecting the red channel, and dragging the midpoint to the right.



Color is always subjective... and as you can see, these two methods gave noticeably different results (especially in the coloring of the footpath)... but either way, the magenta cast in the sky has been reduced. Wink I'm sure others here could do a better job...


PostPosted: Sun Feb 20, 2011 5:45 pm    Post subject: Reply with quote
In Photoshop I lassoed the discoloured area, put a large feather value on it, so the edges of the changes would fade gradually and adjusted the colour balance to -19 on Red to Blue and +9 on magenta to green. It's not perfect but you can get quite an improvement like that.



I didn't go into the tree, I probably should have done.

Here's another go at it, going right the way down the middle of the picture -



PostPosted: Sun Feb 20, 2011 9:14 pm    Post subject: Reply with quote
Thank you all for the tips . These films were clearly poorly processed .
I'll try to change something in Gimp .


PostPosted: Sun Feb 20, 2011 10:18 pm    Post subject: Reply with quote
I think it looks more like a light leak than a processing problem.


PostPosted: Mon Feb 21, 2011 7:27 am    Post subject: Reply with quote
PaulC wrote:
I think it looks more like a light leak than a processing problem.


It's curious , because the films were deposited in their canisters in a dark dry place , like the other films. the original photos are perfect ,they don't show such a tint. And the magenta area is more on the center of the frame as a wide longitudinal band .It respects the long borders of the frame.
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