[Qgis-developer] Raster saturation issue

John C. Tull jctull at gmail.com
Fri Apr 19 12:39:19 PDT 2013

On Apr 18, 2013, at 6:33 PM, Nyall Dawson <nyall.dawson at gmail.com> wrote:

>>> On testing saturation today, I did notice a potential bug with that setting. For my test raster, I set the saturation to 1 and the difference between that setting and 0 was quite large. If I move to 2, 3, 4, and so on, the differences are very small and incremental.
>>> I'm wondering why the leap in saturation from 0 to 1? Is something incorrect in the algorithm calculating saturation? It seems as the values between 0 and 1 need to be handled to make the 0 to 1 change as incrementally small as the 1 to 2.
>> Can you create a bug report about this and attach your raster to it
>> (if possible)? I'll take a look at this and see what's happening...
> Actually - I can replicate it here. Don't worry about attaching a raster.
> Nyall

Hi Nyall,

I'm just getting back to this, so I don't know if a bug report is still required or if you worked on it already. I'm building trunk now and will followup with a bug report if the issue persists.


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