Re: [Gimp-user] selection by value threshold

Somehow I neglected to mention that I am trying to do this in gimp 2.9.

Indeed I could do something like convert to grayscale and then select, but
right now I can't numerically specify the range of 16-bit values that I
want to be selected.

Select By Color can be used, but I can't tell how the selection is working
in gimp since the threshold appears to suggest it is working on the 8-bit
image on screen.  I can't quite suss out if 16-bit is fully supported from
python-fu in 2.9...if someone is confident it is I could write this as a
simple plugin.

On Tue, Jul 11, 2017 at 3:10 PM, Carol Spears <carol spears gmail com>

On Mon, Jul 10, 2017 at 2:33 AM, Mitti Mithai <mittimithai gmail com>

I've never had to to this with gimp yet, but I need to make a selection by
value threshold (I want to "cut out" stars that are hitting saturation in
my image with values of 64k)...I can't quite seem to figure out how to do
it.  Does anyone have any advice?

Image -->Colors-->Components-->Decompose has options to decompose by HSV
and HSL.  Perhaps the Saturation layer would be helpful?

If you have an example image, after decomposing, you could select by the
color of gray that your saturation would be.

Interesting problem....


[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]