Fix Color Image with Channels

[nazca13]

If you know for example the blue channel has a lot of marks, how can you use the red and green to fix the blue while keeping the image color consistant. I don't want it black-and-white, but keep its color.

Or how could you exaggerate the garbage in the blue channel and use the green channel (best channel) to fix just those garbage areas.

[chillin]

Could you post a sample?

[Indrasish]

Yes I agree, without a sample it is difficult to understand.

[redcrown]

I think you will find that editing the channels directly does not work. Doing so will introduce all kinds of wierd colors. So trying to "fix" the blue channel by cloning on it or copying portions from another channel is not productive.

The better way and more common way to fix "marks" in the image while preserving colors is with a technique called "frequency separation." Google that phrase for tons of examples and tutorials. Better yet, go to Youtube and search with that phrase. There are many examples there.

[nazca13]

Here is the original

[nazca13]

Here is my work so far... curve adjustment first, followed by some spotting with healing brush and spot healing brush.

I tried the hue/sat and the selective color technique to reduce the yellow, but no luck.. I found out that it is actually more red than yellow, but at the same time the photo has the typical honeycomb texture applied. Couldn't see that at first until I zoomed in.

WIll follow advice on frequency... but maybe I am too much into this yellow type spots.. they are the leg, shirt, hair, and obvious face..

thank you

[CKAJCA]

First of all there is low contrast in the image so drag in the black and white points using levels adjustment. Then use the middle eyedropper of a curves adjustment layer and click on the white of the eye and that will get you very close to the correct colours. Use of the healing bush or spot healing will clean up the skin very quickly

[nazca13]

Your right... I tried the spatial frequency technique, increased contrast, and added some vibrance with a surface blur (for the honeycomb background).. here is the final photo.

The spatial frequency absolutely amazes me, because it took care of stains..now I have to learn more about this to understand how it actually worked.. cool..

[CKAJCA]

Originally Posted by nazca13

Your right... I tried the spatial frequency technique, increased contrast, and added some vibrance with a surface blur (for the honeycomb background).. here is the final photo.

The spatial frequency absolutely amazes me, because it took care of stains..now I have to learn more about this to understand how it actually worked.. cool..

On my calibrated monitor the skin looks very magenta :-( mainly the face

[Coriolanus]

You could try fixing the spots and color in Lab-mode.
Example (not spot on but to give an impression):

[Flora]

Originally Posted by CKAJCA

On my calibrated monitor the skin looks very magenta :-( mainly the face

On mine too


Here my result (colours depend a lot on individual Monitor Calibration)

SNAP-140.jpg

I used mainly Frequency Separation (here a short Tutorial on it)

Here a Tutorial on removing honeycomb texture. The link for the FFT Filter used in the Tutorial doesn't work anymore here is the new one.

[chillin]

You could use HSL to get rid of the yellow or other "miss colored" spots.

gifs are banned

[CKAJCA]

[QUOTE=Flora;308601]On mine too


Here my result (colours depend a lot on individual Monitor Calibration)

Those are much better colours

[nazca13]

so appreciated everyone... I have a good one coming up in the next two or three days ok.. just trying myself first.