RE: K2 Yellow Filter reversal?
RE: K2 Yellow Filter reversal?
- Subject: RE: K2 Yellow Filter reversal?
- From: Rick Gordon <email@hidden>
- Date: Sat, 22 Nov 2008 02:53:51 -0800
I'd run a Photo Filter in Photoshop using a color value that has the negative values of the a and b Lab values for the yellow filter but, for instance, the yellow listing in the Photo Filter dialog has Lab values of L90, -5a, 85b; so I'd set up a custom photo filter of L90, 5a, -85b.
Rick Gordon
------------------
On 11/21/08 at 9:06 PM -0500, J Richter wrote in a message entitled
"K2 Yellow Filter reversal?":
>I thought I'd pose this to the color theory experts...
>
>A friend shot a landscape image in color but forgot to remove her K-2 yellow filter so now the image has a <filtered> yellow cast to it. Since the K-2 filter has a specific function (more suited to B&W photos), is there a formula that can reverse the effect and bring back a "natural" color to the image? I don't know my color math to figure this out using Photoshop. I've tinkered with it, but am not making any headway. Is this a futile effort? I hope one of our geniuses (genii?) has an answer.
>
>Thanks - Jurgen
--
___________________________________________________
RICK GORDON
EMERALD VALLEY GRAPHICS AND CONSULTING
___________________________________________________
WWW: http://www.shelterpub.com
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden