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01/12/2006 08:07:43 PM · #1 |
I have some pics of a group of people and a big portion of the picture has a projector shinning over them (it's a consistent colour with nothing projected) - giving a big blue square in the middle of the pic. While I didn't take the pic, I would like to somewhat easily fix the problem (I did preset the camera in RAW for them, so have a chance:).
I was thinking of creating 2 JPG's and get the WB correct in each. I then need a way to combine different sections from each pic to create the fixed version. The areas are basically straight edges but not completely.
Been not much os a PS bod, what would you suggest is the best way to align the pieces and how do I do that without a straight edge? |
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01/12/2006 08:19:15 PM · #2 |
An interesting problem... I've dealt with different exposures but never different white balances. The solution, however, should be similar.
Bring both images into one document on separate layers. Put a layer mask on the top image. Then select the layer mask and then paint with black over the areas that you want to hide (or that you want the underlying image to show through).
No straight edges necessary ... you just paint with white or black depending on whether you want to hide or uncover parts of the image. |
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01/12/2006 08:32:36 PM · #3 |
First, make them TIFFs out of RAW, not jpg. More bit depth, more flexibility.
Second, and I have no clue if this will work, I have solved a vaguely similar problem (without using multiple WB compositing) by duplicating the BG layer and then using hue/sat and levels to throw the one section in a totally different color direction than the other section, then using magic wand with a very wide tolerance to select the area that is different. Then I save the selection, toss the altered layer, and run a selective color adjustment layer on the selection. It worked ok.
In this case, you'd use the saved selection to remove the affected area from the overlying image so the correct WB showed through from beneath. I don't know how viable this is without seeing the actual image. It's just one of the weird things I've tried over the years.
R. |
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01/12/2006 08:51:08 PM · #4 |
Thanks - I know it's hard without seeing a full picture but it's a kids choir type of thing, so would prefer not to post pics of 2 dozen other kids for obvious reasons (sad comment on the world really).
The best I can do is this portion (I think it gets the point across); although not sure to do about the shadow thing that isn't a lot of work I ain't doing....
Thank you for the suggestions - I should have thought of 16bit TIFF but that is a better idea.
btw - I was really impressed with the 20D for this - I had to preset everything for my other half without knowing what was there. Picked the 85f1.8 in AV mode around f2.2 at ISO 1600 (no flash). There is noise in the shadows but overall a great stab at bad lighting.
Message edited by author 2006-01-12 20:56:07. |
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01/13/2006 08:54:46 AM · #5 |
How about just setting the overall WB on both of them the same. Open them both and draw Paths around the areas. Go to the Match color and then select the other as the Source. Adjust the color Intensity, luminance and fade to get them the same.
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