Photoshop contrast adjustment creates color cast - how to fix?

[Roscoe]

I used a local curves adjustment (with a layer mask) set to "Strong contrast" to make the space shuttle "pop" in a particular shot. I looked it so much I copied that adjustment layer to the rest of the launch sequence. I then realized that as I went earlier in the sequence (20 seconds in real time at most) each successive photo developed a blue color cast from the contrast adjustment. I tried a luminosity blend hoping that would take the color out but no change.

Ideas as to why? And best way to correct?

PS: It's a tiff file that was sent from lightroom with the proper white balance.

Roscoe

[iCe]

Have you tried a Hue / Saturation Adjustment Layer and desaturate the blue channel?

[Roscoe]

My skill with PS didn't extend that far...

[iCe]

It's pretty easy. Go to the adjustment palette and mouse over the icons until you see Hue / Saturation. Click the icon. Once its open look for a drop down box that has RGB in it. Open and select Blue. Go to the saturation slider and while watching the image slide it slowly to the left. When you like what you see stop.

[Dobick]

there are two places that you can look to remove the color cast in lightroom, before sending it as a tiff to photoshop, and if you are not doing any selective masking in photoshop, then there should be no real reason that you can't make the adjustments you described all in Lightroom.

1st place that you might look, is in the camera calibration at the profiles selection down at the bottom of the development tab. Play with that and see if it doesn't change the way that the blues are represented.

Second would be the HSL section on the development tab. You can adjust the saturation or the hue of the blue channel, or more likely the aqua channel (that is always the one that I see going most wonky when I make global adjustments)

Hope that helps in some way

[rick4.6]

Here's a trick to get rid of color cast that I use- 1: hit ctrl+alt+shift+e to to create a dup merged layer 2: filter, blur, average it will turn layer into a solid color 3: hit ctrl+i to inverse color 4: change layer mode to soft light 5: adjust opacity to liking. Hope this helps

[Roscoe]

Originally Posted by iCe

It's pretty easy. Go to the adjustment palette and mouse over the icons until you see Hue / Saturation. Click the icon. Once its open look for a drop down box that has RGB in it. Open and select Blue. Go to the saturation slider and while watching the image slide it slowly to the left. When you like what you see stop.

Thanks

Originally Posted by Dobick

there are two places that you can look to remove the color cast in lightroom, before sending it as a tiff to photoshop, and if you are not doing any selective masking in photoshop, then there should be no real reason that you can't make the adjustments you described all in Lightroom.

I am making selective masks hence my doing this in CS5

1st place that you might look, is in the camera calibration at the profiles selection down at the bottom of the development tab. Play with that and see if it doesn't change the way that the blues are represented.

I've calibrated my camera so the cast isn't from there. Note that the contrast worked fine in one image, but applying the exact same technique in another turned the space shuttle blue

Second would be the HSL section on the development tab. You can adjust the saturation or the hue of the blue channel, or more likely the aqua channel (that is always the one that I see going most wonky when I make global adjustments)

Hope that helps in some way

I'll try that sometime when I'm not masking (note I've seen the adjustment brush used in place of masks in LR and ACR but I don't seem to have much luck doing that).

Thanks!