Posted By RBS76:
EricFerguson ~ I have already been shooting in a room with grayish walls... I have generally been rather tediously masking all the walls and then bringing in the color I need with the color balance adjuster, further adjustments with hue/saturation adjuster. Are you suggesting something more along the lines of a "green screen" type situation? That would make it much easier to mask the walls using the color selector.
The method you're using now is really the most correct way to do it, but if all you want to change is the wall color it's easy to do it with the colour replacement tool in your editing software, just roughly mask the wall, and then change the hue of every red pixel to blue, for example. This assumes that you already have a wall of the desired saturation and lightness (hue doesn't matter)
Let me see if I can cook you up an example, back in two seconds.
ETA: Ok, let's use this file as a case study. Nicely saturated red wall, a bit of red spill in a few places... let's change the colour:
Head straight to "image > adjustments > replace color" click the "+" tool and then click all the spots in the image where the colour you want to replace is, and notice the grayscale sample preview change in the color replace dialog box. Once it looks like you've got the right area of the image selected for modification, drag the hue slider around to see things change in real time.
I made you a youtube video showing off the technoque on this file, that's
here. (Note that with this low frame rate it looks like I hit "color match". I don't. It's "color replace"
This file with its white couches makes the whole thing look suspiciously simple: frankly you could probably change the wall color in this file just with the "hue" slider, since there is no color anywhere else in the image. But the process is the same for more complex images, just mask out other red things in the frame that you don't want to change.
(Edited on 2009-07-03 22:55:44 by EricFerguson)