Search found 3 matches

by displayguy
2015-04-17T10:51:23-07:00
Forum: Users
Topic: "convert -colorspace lab" output out of range
Replies: 7
Views: 3215

Re: "convert -colorspace lab" output out of range

Here comes the files (plus screenshots from Colormine and Photoshop):

https://drive.google.com/folderview?id=0B5NsdVYF0z_ZfkFCNy1XOEY5blc4UjlKT1N3dUs1bXg0RVloS21CemZsWm83VVhkeGVIQkE&usp=sharing

It's the original sRGB file and the output of:

convert original.tif -colorspace lab -define quantum ...
by displayguy
2015-04-17T09:55:09-07:00
Forum: Users
Topic: "convert -colorspace lab" output out of range
Replies: 7
Views: 3215

Re: "convert -colorspace lab" output out of range

Thanks a bunch!

To sum up, I installed libtiff* on my system and compiled IM from source with the following (just being thorough for the benefit of future inquirers):
./configure --enable-hdri --with-libtiff
make clean
make
sudo make install


Then I convert the images with:

convert input.tif ...
by displayguy
2015-04-15T07:52:41-07:00
Forum: Users
Topic: "convert -colorspace lab" output out of range
Replies: 7
Views: 3215

"convert -colorspace lab" output out of range

Hi all,

I'm trying to convert sRGB pictures to CIELAB by running: convert original.tif -colorspace lab output.tif

When I extract the values with: convert output.tif output.txt

The L value is a LOT higher than the values that I get from resources like Photoshop and colormine.org. More ...