Re: [Gimp-developer] [Gimp-user] Test images and test suite (was Re: GIMP should fork babl and GEGL)


On Fri, Nov 7, 2014 at 1:07 PM, Elle Stone
<ellestone ninedegreesbelow com> wrote:
On 11/06/2014 11:24 AM, Gary Aitken wrote:

Even if the result is not obvious visually, I need a heads-up
so I can pay close attention to what's happening and undo the
operation if appropriate.

On 11/07/2014 04:25 AM, Simos Xenitellis wrote:

Is there a test suite available that could show the expected behavior?
If not, let's try to build one, both the test-suite code plus the images

As Gary hinted, when doing "X" to an image, whatever "X" might be, sometimes
results are visually obvious and sometimes not. Many times when editing
images, I've done "X" and thought "X" was just fine, only to realize later
that "X" had changed the file in an unwanted way that only became obvious
several editing steps later.

And sometimes "X" can make a change in an image that the monitor's limited
color gamut can't display, that might only pop up visually when the image is
printed or displayed on a wider gamut display.

There are a lot of nice copyright-encumbered test images available on the
internet, but not many "copyleft" test images, and not many images that
reflect the full range of colors as captured by digital cameras and then
interpreted using typical matrix input profiles.

When I was testing unbounded sRGB image editing, the first task was to put
together some appropriate test images and then figure out which tests needed
to be made, as per Simos's "test suite".

A good test suite of "copyleft" images would be a nice thing to have,
whether for testing new and existing editing algorithms, or for whatever
testing that individual GIMP users might want to do on their own
(printer-related, for example).

That's a good idea. What kind of images would be the most interesting?
Basically should that be images, taken with a good digital camera, of
a lot of objects of various colors?
It could also be images with color gradients, I guess (sunset/rise and such)?
Or do you already have such copyleft images at your disposal that you
could provide?
Indeed if we could gather these for access to anyone as reference
(then various software could use them for their own tests), it would
be great.


Best regards,
Elle Stone
gimp-user-list mailing list
List address:    gimp-user-list gnome org
List membership:
List archives:

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