Black/White ????
by Oliver Juric
on
Mar 3, 2008 at 4:45:30 pm
Hi ya'll, first off, sorry for not explaining better in the subject line.
What i want to do, but don't know how, i want to turn a special part of a footage (lets say a person who is walkin by, or just appears in the footage in black/white, while the rest of the footage stays the way it is.
I was looking on the tutorial page, but since i don't know how this technique is called i couldn't find anything.
Can someone help me out ? or point me to a good tutorial about this subject? BTW, how is this technique called, if there is any special tag to this.
Re: Black/White ???? by Mike Park on Mar 3, 2008 at 5:03:51 pm
It sounds as if you want to isolate the foreground image - person walking - from the background and apply different treatments to each. To do this you will have to "cut out" your person walking so that he/she is seperate from the background. You can do this with alpha maps - black and white maps which control opacity - or keying, if you used a green or blue screen, or you can rotoscope a mask by hand.
Re: Black/White ???? by Joe Moya on Mar 3, 2008 at 7:34:00 pm
Do a search with the keyword - Rotoscoping or for keying - Green screen.
If you're not working with a GOOD green or blue screen with the right setup (lighting, camera, etc), then you are going to use rotoscoping.
And, rotoscoping is a VERY tedious and time consuming process to get it accurate and with clean mattes/apha channels... and almost impossible to do if you have lots of movements or loose hair. When I situations that are difficult and want to rotoscope... I use a MOCHA by Imagineer to make it a more tolerable process.
