Re: filmscanners: Colour fix problem
At 16:11 9/06/01 -0700, you wrote: 1. use the eyedropper to sample a midtone that contains the color cast (I used a point on the MIG's fuselage between the wing and the number) 2. fill a new layer with the sampled color and invert the layer (imageadjustinvert) 3. change the layers blend mode to 'color' and reduce opacity to suit (~50%) Bob Wright That was excellent - I feel a bit dumb not thinking of that myself. Part of the problem of course was the the pic shows significant vignetting (^$%#$ el cheapo w/a zooms on P S cameras!). The problem I had encountered before was that as I dialled in magenta to fix the centre, the edges went magenta on me because of the density diff. The solution was to sample the cast as you did at the center AND in the corner (call it step 2a). Then make up a layer with a circular gradient fill and invert that. I did this in Photo Deluxe aka PS Lite Cheers Ian Boag
RE: filmscanners: Colour fix problem
Ian Boag writes ... At 16:11 9/06/01 -0700, you wrote: 1. use the eyedropper to sample a midtone that contains the color cast (I used a point on the MIG's fuselage between the wing and the number) 2. fill a new layer with the sampled color and invert the layer (imageadjustinvert) 3. change the layers blend mode to 'color' and reduce opacity to suit (~50%) Bob Wright That was excellent - I feel a bit dumb not thinking of that myself. ... Cheers Ian Boag I was just made aware of another article, part of Bruce Fraser's at CreativePro.com ... http://www.creativepro.com/author/home/40.html ...specifically on this very subject ... Out of Gamut: Color-Correcting Photographs in Photoshop http://www.creativepro.com/story/feature/13486.html shAf :o)
Re: filmscanners: Colour fix problem
Title: Re: filmscanners: Colour fix problem The greenmig photo can be color corrected and fixed - fairly easily. (corrected greenmig sent direct to poster, with PS adjustments shown on graphics of each modification) He uses PSP, which I have no knowledge about, so some adjustments may not be easily accomplished, such as Selective Color, which was used to take the yellow out of the white floor. Neither the film captured (greenmig) nor the digimig photos exhibit broad gamut as shown below in two 9kb graphics. Both are 2D L.a.b. graphics, referencing ColorMatchRGB in the green outline with the color gamut data of the picture (extracted from the photo in ColorThink) shown as red. The film photo actually has a broader gamut than the digital picture. The scene itself was not a particularly saturated color situation. See comparison with ColorMatchRGB gamut. Original greenmig: The digimig photo: on 6/9/01 1:26 PM, Ian Boag at [EMAIL PROTECTED] wrote: I have attached two heavily crunched down photos. I am looking for help here on how to fix one of them. Last year I went to the RAF museum at Hendon. I took pictures on regular Fuji 200 film using a Konica Revio APS camera. I also had an Agfa 1680 digicam. The museum has some kind of arc lighting which came out all green in the prints. It scans like that too. See greenmig.jpg (the pic is a Mig-15). The scan was done on a Kodak FD-300. Comes out much the same whether I use their auto fix on scanning or not. The digicam took a picture that looks about right (see digimig.jpg). Generally the FD-300 does a job that I am happy with. My problem is how to fix the green scans. If I just throw in magenta correction I eventually get the plane looking right, but the roof and surroundings go bad. The situation is complicated of course by the fact that the camera suffers from vignetting at full aperture on max wide. The problem is that the film captures what data fits in it's gamut at the time of the shot, and information is just not there for you to adjust the color. The digicam is probably doing a white balance and capturing a different gamut. Jim Snyder
Re: filmscanners: Colour fix problem
Re: filmscanners: Colour fix problemRichard N. Moyer wrote: He uses PSP, which I have no knowledge about, so some adjustments may not be easily accomplished, such as Selective Color, which was used to take the yellow out of the white floor. The colour correction tool in PSP 7 works very well. I haven't tried it on this particular image, but I have used it extensively on restoring colours in images scanned from faded prints. It's called auto colour balance and it's the first of the buttons in the photo toolbar. Just set the colour temperature and it does the rest. Rob
Re: filmscanners: Colour fix problem
1. use the eyedropper to sample a midtone that contains the color cast (I used a point on the MIG's fuselage between the wing and the number) 2. fill a new layer with the sampled color and invert the layer (imageadjustinvert) 3. change the layers blend mode to 'color' and reduce opacity to suit (~50%) Bob Wright - Original Message - From: Ian Boag [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Saturday, June 09, 2001 10:26 AM Subject: filmscanners: Colour fix problem I have attached two heavily crunched down photos. I am looking for help here on how to fix one of them. Last year I went to the RAF museum at Hendon. I took pictures on regular Fuji 200 film using a Konica Revio APS camera. I also had an Agfa 1680 digicam. The museum has some kind of arc lighting which came out all green in the prints. It scans like that too. See greenmig.jpg (the pic is a Mig-15). The scan was done on a Kodak FD-300. Comes out much the same whether I use their auto fix on scanning or not. The digicam took a picture that looks about right (see digimig.jpg). Generally the FD-300 does a job that I am happy with. My problem is how to fix the green scans. If I just throw in magenta correction I eventually get the plane looking right, but the roof and surroundings go bad. The situation is complicated of course by the fact that the camera suffers from vignetting at full aperture on max wide. Any ideas would be gratefully accepted. Ian Boag
RE: filmscanners: Colour fix problem
Ever think of doing something similar to split contrast printing as used in traditional Black White photographic printing but this time with respect to color correction. Namely, make adjustment layers for each of the different items that need a unique color correction, masking off the other items, and then make the required color correction for that specific item. When you are done, merge the different layers down. This will give you a particularized adaptive color correction as opposed to a global one. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Ian Boag Sent: Saturday, June 09, 2001 12:27 PM To: [EMAIL PROTECTED] Subject: filmscanners: Colour fix problem I have attached two heavily crunched down photos. I am looking for help here on how to fix one of them. Last year I went to the RAF museum at Hendon. I took pictures on regular Fuji 200 film using a Konica Revio APS camera. I also had an Agfa 1680 digicam. The museum has some kind of arc lighting which came out all green in the prints. It scans like that too. See greenmig.jpg (the pic is a Mig-15). The scan was done on a Kodak FD-300. Comes out much the same whether I use their auto fix on scanning or not. The digicam took a picture that looks about right (see digimig.jpg). Generally the FD-300 does a job that I am happy with. My problem is how to fix the green scans. If I just throw in magenta correction I eventually get the plane looking right, but the roof and surroundings go bad. The situation is complicated of course by the fact that the camera suffers from vignetting at full aperture on max wide. Any ideas would be gratefully accepted. Ian Boag
Re: filmscanners: Colour fix problem
on 6/9/01 1:26 PM, Ian Boag at [EMAIL PROTECTED] wrote: I have attached two heavily crunched down photos. I am looking for help here on how to fix one of them. Last year I went to the RAF museum at Hendon. I took pictures on regular Fuji 200 film using a Konica Revio APS camera. I also had an Agfa 1680 digicam. The museum has some kind of arc lighting which came out all green in the prints. It scans like that too. See greenmig.jpg (the pic is a Mig-15). The scan was done on a Kodak FD-300. Comes out much the same whether I use their auto fix on scanning or not. The digicam took a picture that looks about right (see digimig.jpg). Generally the FD-300 does a job that I am happy with. My problem is how to fix the green scans. If I just throw in magenta correction I eventually get the plane looking right, but the roof and surroundings go bad. The situation is complicated of course by the fact that the camera suffers from vignetting at full aperture on max wide. The problem is that the film captures what data fits in it's gamut at the time of the shot, and information is just not there for you to adjust the color. The digicam is probably doing a white balance and capturing a different gamut. Jim Snyder
