removing just one color with Premiere Pro

[spicediver10191]

I have short sequence in my project in which the source footage has a woman's eyes artificially colored blue - I mean deep blue, as if there's a blue film over the entire eye surface. Its a rotoscoping effect that was done in post-production apparently.

Anyway I basically just want to remove the blue so that the eyes are either reduced to greyscale or - even better - returned back the natural black/brown color of the actress's real eyes. I have some other footage of her with the eyes untreated for comparison, so I know what her real eyes look like.

I've been playing around with 3-way Color Correction feature in Premiere Pro 2.0 - I'm new to this - and I'm able to isolate my chosen area easily (that is, the eyes) because blue appears nowhere else in this footage.

But what I don't know how to do is:

1) remove the color blue and see what remains;

OR

2) change the color blue to something resembling the real color of her eyes. But the color wheel spectrum thingy that you adjust by dragging your mouse around contains nothing that resembles the color brown.

Any tips?

Thanks.

[guns1inger]

Check out Wrigley-video.com. There are tutorials that cover this type of thing for Premiere.

[spicediver10191]

thanks - checked those tutorials out - but there's nothing about these types of color correction.

[guns1inger]

http://www.wrigleyvideo.com/videotutorial/tutdes_colorpass.htm

Is close to what you want, except you want to isolate and change one colour while keeping the rest as-is.

[lordsmurf]

It's almost impossible to remove just one color, due to the nature of how video works. Even with a still photos, it's close to impossible, without going in there and manually tracing it out. You'd have to do that for every frame, 24-30fps, to be perfect on video.

[edDV]

If the blue color was manually added and it has unique Y, Cb, Cr values, you can filter those pixels to monochrome mathmatically. Restoring the eye color would require masking or rotoscoping.

[spicediver10191]

Done!

I used the Colour Pass feature and ticked the "reverse" box. About 80% of the blue was removed without affecting any of the surrounding image.

Thanks.

[JuneMartin]

Took me a while to work out how to do this, you need to start from the effects panel and type in leave colour, I found the following information really helpful when working out how to do this in premiere pro, hope it helps. https://www.trainingconnection.com/premiere-pro/lessons/spot-color-effect.php