You can get this effect with a secondary color corrector like on Final Cut Pro indeed. You have to select a range of colors, or a single color (like pure red or different tons of red) and desaturate everything else.
BUT the most important trick is not to only think you’ll get the effect in the editing process but be very careful in the shooting cause if you want to get only black and white with the red alone for example, you have to be sure you shoot no other red thing except the red object you want to isolate (like the red coat in Schindler’s List). The color has to be strictly separate from others.
In case of the pic you posted from Sin City. You can see that there’s a whole body isolated with a yellow color. In this case, they use another trick in the shooting. They painted the whole actor’s body in green (more efficient than blue, which is more used for outside scenes), so that you can change the green to any other colors in the editing process. Now of course, same problem, be sure the green is only on the actor’s body and no other green in your frame, cause it will be replace by yellow too.
Another thing, for the black and white comics style, here’s a very good tuto. It’s for Photoshop but if you get it, you can use the same kind of settings for Adobe Premiere and then try to do the same on Avid or Final Cut Pro.
<LINK_TEXT text=“http://tutorialseeker.com/forum/index.p … topic=2279”>http://tutorialseeker.com/forum/index.php?showtopic=2279</LINK_TEXT>
Another trick to get a very good black and white. Orson Welles’s trick (so I’m giving you a very precious trick, not known by much) : use a red filter when you shoot in black and white, put a red filter directly on your camera lens (you can do the same for photography). It will erase any mid colors (in black and white, this is for grey) and you’ll have a real black and white, not much grey.
Like as you can see on this pic, Marv got his bandages real white, almost unreal. He really had bandages on the shooting, but they use red bandages, so that they could change the red into pure white in the editing.
I hope it can help you. Feel free to ask other things if you ever want to know more.