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10/13/2010 08:13:35 AM · #1 |
I went to take some pictures of wrestlers using a chromakey green screen - the lighting went okay - the results are not bad at all I think.
However on cs3's select by colour range i still sometimes leave the very faintest film of green in some areas of the background - sometimes it is almost invisble unless I run it through a filter like topaz adjust.
In case I have explained that badly I'll try again. I use select by colour range, pretty carefully, adjusting selection and fuzziness. On the preview it looks fine and when I remove the selected green it usually looks good. There are odd bits of green clinging to hair and stuff but nothing I can't fix.
But sometimes there is still a 1 or 2 percent opacity greeness in the area that looks as if it has been removed. if I put a white layer behing it the white looks tinged with green.
Is there anyway I can ask photoshop to select and remove areas of the picture with less than 100% opacity ?
Or a way in which I can programme the select colour range to give results where only 100% opacity pixels make the cut, the rest being eliminated ?
Not sure that I have explained that well, hopefully someone will get what I mean
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10/20/2010 03:16:05 AM · #2 |
A bit late to respond, but I think I know what you are talking about. Basically, in areas where there are pixels that are a blend of background and subject, that leaves a green "halo". This probably happens, as you have stated I believe, in areas like the hair..maybe on edges of the skin.
You need to select all the green, then feather the selection by whatever pixels you think will work based on your images resolution. When you feather the selection, the pixels on the edge of the selection are not 100% removed when you hit delete.
If you want to post an image showing the issue I can be of further help. This is a VERY common thing that everyone on Earth who shoots anything on a "green screen" deals with. We just gotta figure out which method to use for your situation.
Hope this helps. |
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