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Men In Yellow

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  #1  
Old 03-18-2006, 12:12 PM
HroadhogD1 HroadhogD1 is offline
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Men In Yellow

This is another photo given to me by the same guy as in the mule photo. I was told they were working in the mess hall, and they came outside for this picture. I Was wondering what to do with it. I can get it to look fair, but it looks red then. I know someone here could help. Thanks
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Old 03-18-2006, 12:25 PM
HroadhogD1 HroadhogD1 is offline
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Sorry, here is the photo.
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Old 03-18-2006, 04:22 PM
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Cameraken Cameraken is offline
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Hi HroadhogD1

The picture posted is heavily compressed and blocky from jpeg artefacts. Because of that I have not spent too long on this. However you should be able to get a decent picture from your original.

The red and green channels are shot. If this was a colour picture then there is no colour to salvage. You should be able to get a good black and white and then colourize it if you wish.

Use channel Mixer
Red -10
Green 0
Blue+136
with monochrome checked.

This will give a good start. From there you could use Floras tutorial to improve it further

http://retouchpro.com/tutorials/?m=show&id=206


Hope this helps.

Ken
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Old 03-18-2006, 10:19 PM
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bart_hickman bart_hickman is offline
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Hi Ken,

How did you come up with those specific numbers for the channel mixer? In particular, you are using information from the red channel (-10%) and none from the green channel even though the red seems farther gone than the green.

Bart
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Old 03-19-2006, 05:34 AM
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Cameraken Cameraken is offline
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Hi Bart.


Quote:
How did you come up with those specific numbers for the channel mixer

Hee Hee. A complete guess.

There are loads of ways to do this, Apply image, calculations, Lab > Lightness, CMYK > Yellow, Hue/sat, plain Desaturate, or even Image > mode > greyscale.

I just feel more comfortable with the channel mixer.

If you compare the results of desaturating to channel mixer you will notice that more detail can be retained by playing with the sliders.

I just tried again and came up with
Red 0
Green 0
Blue 132

So I guess something around there is OK. I don’t know a way to do this ‘By the Numbers’ I just eyeball it.

If anyone knows a way to do this ‘By the Numbers’ I would be interested to hear it.



Hope this helps.

Ken
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Old 03-19-2006, 08:15 AM
Ken Fournelle Ken Fournelle is offline
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Another way is to look at the Channels. The blue channel has the most information. Open the Channels Palette and select the Blue Channel.
Select>All, then, Edit>copy. Return to the Layers Palette and paste the copied Blue Channel into a Background Copy Layer. (the background layer copy which you did previously as a matter of course) You will get a B&W image layer at the top of your stack.

k
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Old 03-19-2006, 09:13 AM
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Cameraken Cameraken is offline
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Absolutely correct Ken.
In this case where only one channel is needed, extracting the blue channel and then adjusting levels would be a more precise way.
My method is more suited to a picture where there is info in two or more channels.
Or
Using channel mixer at
Red 0
Green 0
Blue 100

Is exactly the same. And then adjust with levels.

Ken
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Old 03-19-2006, 12:30 PM
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bart_hickman bart_hickman is offline
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Ahhh! Thanks. 0,0,x makes much more sense.

The curve and channel mixer layers are far and away my most commonly used.

Bart
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