How can I fix the green/magenta channel in this image?

Question

Hello. I extracted these images from a video game, but they have a green tint and magenta shadows that they shouldn't have. It's not an extraction issue, because I've extracted using multiple methods with the same result. So, I decided to try manually fixing them with color channels.

Here's what they look like now:

When they should look more like this:

I've noticed that their green channel just looks like a grayscale version of the image, with darker and lighter values than the red and blue channels. I believe the green channel is too strong and needs to be reduced somehow.

Any advice on how to weaken the green/magenta channel, or other ideas to remove the tint? I've attached the psd for reference.

Saaam Skelegator · Accepted Answer

I managed to figure it out in GIMP, using the YCbCr compose functions. Thanks!

davescm · Answer

'It's not an extraction issue'It looks like it is. A quick look at your channels it looks very much like you have extracted Yuv rather than RGB which is a method used when encoding video. The Y channel contains the luminance (and would appear as your 'green channel does), u has +/- blue hues (and would look like your 'blue' channel does with neutral as mid grey) and v +/- red hues (and would look like your 'red' channel does with neutral as mid grey). There is no green channel as -u and -v values result in green hues.There is no straightforward method in Photoshop to use those channels.Dave

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