• Adobe After Effects

  Black/White ????

  Posted by Oliver Juric on March 3, 2008 at 4:45 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.

  thanks for your effort in advance

  peace

  oliver

  Joe Moya replied 18 years, 5 months ago 3 Members · 3 Replies
• 3 Replies

• 

  Mike Park

  March 3, 2008 at 5:03 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.
• 

  Oliver Juric

  March 3, 2008 at 5:12 pm

  thanks.

  is there a tutorial to this?

  on, how to cut out something from a certain footage, with alpha maps etc?

  thanks again

  oliver

  —-EDIT—

  i already found a tutorial on this site.

  thanks again
• 

  Joe Moya

  March 3, 2008 at 7:34 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.

  Joe

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