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Posted by Luis Ortega on 09/11/06 19:05
Thanks, you're very kind. I understood you the first time!
Will this be possible to do as a batch action in Photoshop?
Whatever we finally do, it has to be able to be automated for a batch
action, as there is no way that we could do this to hundreds of individual
drawings.
"PTravel" <ptravel@travelersvideo.com> wrote in message
news:4mlppiF6eq8cU1@individual.net...
> good grief -- I don't know what happened, but this is rife with typos.
> I'll fix the whole thing:
>
>
>> Okay, here's how I handle keying out material that hasn't been
>> specifically prepared for keying. I'll explain this by example, because
>> I think it's clearer.
>>
>> Imagine a black box on a white background. The center of the black box
>> is white.
>>
>> Obviously, if I use a luma or color key to key out the background, I'll
>> also lose the center of the box, which I don't want to do.
>>
>> So, I create a garbage matte that covers, roughly, the center of the box.
>> I either pin it to the center so that it tracks movement automatically,
>> or I use key frames and manually track. It doesn't have to be exact --
>> it just needs to cover up that which I don't want keyed out.
>>
>> I then apply my luminance (or color key) and key out the background BUT I
>> reverse the key, i.e. everything but the background gets keyed out. I've
>> now created a matte the eliminates, exactly, the background and only the
>> background.
>>
>> I change the color of the matte to green and super it over the original
>> clip. Using my box example, I now a black box with a white center and a
>> green background.
>>
>> NOW I can use chromakeying to alpha out the green background.
>>
>> I find this works pretty well.
>>
>
>
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