Re: [Gimp-user] changing colour

2010-01-31 Thread Patrick Horgan
Norman Silverstone wrote: > I have a test image which is monochromatic (black/white), is a grid > pattern and shades from black on the left to white on the right which I > have been using for some Unsharp Mask experiments. In order to extend > these experiments I would like to change the test image

Re: [Gimp-user] Can I Subtract a color overall?

2010-01-31 Thread David Gowers
On Mon, Feb 1, 2010 at 1:05 AM, John Mills wrote: > Thanks to Stefan, Dan, and David for your replies. I'll look into all three > approaches, but this looks most directly like what I had in mind. > > My limited intuition seemed to suggest that since RGB is an additive color > space, there might be

Re: [Gimp-user] JPG file size increases with saving

2010-01-31 Thread Sven Neumann
On Mon, 2010-01-18 at 10:40 +0100, yahvuu wrote: > Philip Rhoades wrote: > > It still seems counter intuitive that opening a JPG (even if it is a > > photo rather than a computer generated image) and immediately saving it > > with 100% "quality" increases the size by 2.5 . . That is only non-int

Re: [Gimp-user] Can I Subtract a color overall?

2010-01-31 Thread John Mills
Thanks to Stefan, Dan, and David for your replies. I'll look into all three approaches, but this looks most directly like what I had in mind. My limited intuition seemed to suggest that since RGB is an additive color space, there might be a direct way to subtract a cast out of it. Regards. -