isolating a colour

[shadow_dog_dx]

hi just wanted to know how to isololate a colour, eg red.
ps: if u cant do this in AE wat programs can u do it in?
thanx.

[oneinfiniteloop]

How do you want to isolate it? Is it one object/prop that is red, or do you want only the red to be present in the shot leaving the rest black and white (ala Sin City)?

There's multiple ways to skin this cat...so a little more info can help us help you.

[shadow_dog_dx]

thanks 4 the reply,
I want to isolate as in have an object like red or sumtin but the rest black n white like u sed (sin city)
thanx.

[Matt Grunau]

If you had say, a ball in your hand and you wanted only that to have color, the best way would be to make the ball a completely different color than anything else in the shot. That way, you could not only isolate that color and desaturate all others, but you could also change the hue of the ball to your liking; it doesn't have to stay the color it originates.

If you have footage already shot and you want to isolate just one object, you will have to rotoscope it. desaturate the clip entirely, bring in the same clip above it, and using masks, you will section it out from the color layer using a mask, and then animate the mask to keep the target item in the selection.

[surf]

there is an effect called color pass in premiere for this task, although, I would use this eff. only with masking! so you mask the pic, add this eff. then add a new layer with the same foot. (this should be the lower layer) and aply to this B&W eff.

[oneinfiniteloop]

Using a mask with Hue/Saturation (with the Colorize option on) will work for you.

[Blaine]

Using a mask with Hue/Saturation (with the Colorize option on) will work for you.
Yeah, this one effect that isn't rocket science. Any decent NLE should be able to handle it. You'll have a lot more success with good planning, though, by determining what you are going to do before you shoot so you can single out the color easier. http://www.dvxuser.com/V6/images/smilies/thumbsup.gif

[oneinfiniteloop]

In Sin City, they used bright blues for the Yellow Bastard, just because it was easier to change that hue to yellow in post. Plan, plan, plan, and your shot will come out a lot better. VFX is all about breaking down the problem and finding the best, not most obvious, solution.

[sumoafro]

Here's a tut on the Cow:

http://www.creativecow.net/articles/kahlenberg_roland/coolsville/index.html