EGBB
Topic Author
Posts: 527
Joined: Wed Feb 16, 2000 3:21 am

Color Casts Rejection Help

Thu Jun 05, 2003 4:47 pm

Just had a rejection this morning for Color casts (first time I have had this sort of rejection) I am not complaining as it was a high sun/ early afternoon shot but was wondering what the experts would do in say photoshop to improve this sort of picture.
http://airliners.net/procphotos/rejphoto.main?filename=184-8418_IMG.jpg

All the best

Derek
 
ckw
Posts: 4586
Joined: Fri Aug 27, 2010 12:26 am

RE: Color Casts Rejection Help

Thu Jun 05, 2003 5:39 pm

Should be salvagable with careful use of curves - I've had a go with the rejected file, but you will get better results from the original. I'm using Corel Photopaint in these examples - but same should look the same in PS

1 - There is a predominant blue cast - get rid of this by reducing the intensity of the blue channel using the curves tool - note the shadow area is more agressively reduced than the highlights.



2 - Now the picture is overall a bit dark, so switching to all channels (RGB) I've boosted the levels a bit (possibly too much  Smile ), again emphasising the shadow area



3 - I think there is a touch of magenta cast as well - you could fix this by a little boost to the green channel.

Of course, the examples don't look too good (cause they're crap screen shots and I'm working from a .jpg), but I think you get the idea.

Cheers,

Colin
Colin K. Work, Pixstel
 
EGBB
Topic Author
Posts: 527
Joined: Wed Feb 16, 2000 3:21 am

RE: Color Casts Rejection Help

Thu Jun 05, 2003 5:58 pm

Colin,

Many thanks I will have a play around with the settings you discribe.

Perhaps with all your spare time now you should do a editing site?
Or should I just send all my pictures to you for editing from now on ?  Smile/happy/getting dizzy

As ever many thanks

Derek



 
ckw
Posts: 4586
Joined: Fri Aug 27, 2010 12:26 am

RE: Color Casts Rejection Help

Thu Jun 05, 2003 6:46 pm

Perhaps with all your spare time now you should do a editing site?

Funnily enough, it was something I was thinking about, but then there are already so many books and websites which cover this. But perhaps a few pages focussed on preparing images for A.net and addressing commonly seen problems would be helpful.

Cheers,

Colin
Colin K. Work, Pixstel
 
Granite
Posts: 5026
Joined: Tue May 18, 1999 5:55 pm

RE: Color Casts Rejection Help

Thu Jun 05, 2003 6:54 pm

Colin

If you have the time, I am pretty sure Johan could incorporate anything you may produce into the FAQ page or similar.

Cheers

Gary Watt
 
EGBB
Topic Author
Posts: 527
Joined: Wed Feb 16, 2000 3:21 am

RE: Color Casts Rejection Help

Thu Jun 05, 2003 7:34 pm

Just re uploaded and thought you would like to see/ compare the two

http://www.airliners.net/addphotos/big/ready/184-8418_IMG.jpg

Many thanks

Derek
 
EGGD
Posts: 11880
Joined: Sat Feb 24, 2001 12:01 am

RE: Color Casts Rejection Help

Thu Jun 05, 2003 8:20 pm

The second one looks good enough to me, Brum, good shot! I guess the haziness of the day played havok with the metering settings on the camera :/
 
EGBB
Topic Author
Posts: 527
Joined: Wed Feb 16, 2000 3:21 am

RE: Color Casts Rejection Help

Thu Jun 05, 2003 10:11 pm

Yes Dan it was a very hazy hot and sticky day in Amsterdam on Tuesday which is not ideal conditions for tacking pictures but needs must  Smile/happy/getting dizzy

BTW I should have been going to Paris but the French ATC strike put paid to that idea so I ended up paying Amsterdam a visit for the day.

I am sure I will get some cleaner air next week in Shannon (I hope)

Derek
 
ckw
Posts: 4586
Joined: Fri Aug 27, 2010 12:26 am

RE: Color Casts Rejection Help

Thu Jun 05, 2003 10:30 pm

Yup, looks like you've got it sorted. My invoice is in the post  Smile

Cheers,

Colin
Colin K. Work, Pixstel
 
EGBB
Topic Author
Posts: 527
Joined: Wed Feb 16, 2000 3:21 am

RE: Color Casts Rejection Help

Thu Jun 05, 2003 11:24 pm

Yup, looks like you've got it sorted

Now watch it be rejected certain kiss of death  Smile/happy/getting dizzy

My invoice is in the post

Your help is worth every penny Colin ...50/50 on any sale of the picture Big grin

Thanks again

Derek


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