Hi Tim,
Many thanks for looking at that.
Regarding the NaN I will have to check because I think one of the
raster I've used (geotiff) had its NaN set to 0 and the histogram was
showing a spike at 0. But it could also be due to the Z-axis not
showing real values!
Cheers,
Benoit
On 16 Oct 2010, at 0:31, Tim Sutton <[email protected]> wrote:
Hi Benoit
On Thu, Oct 14, 2010 at 9:51 AM, Benoit de Cabissole <[email protected]
> wrote:
Hi,
A) In release 14370 the histogram tab of the raster properties window
has a problem:
The histogram is not displayed the second time the 'histogram tab' is
clicked.
E.g.:
1 - open the raster properties window
2 - click on the histogram tab
3 - histogram is computed and displayed
4 - click on any other tab
5 - click on the histogram tab again
6 - blank screen!!
On WinXP - OSGeo4W dev installation
Can someone replicate the problem?
Ok I could replicate that. Will fix.
B) And keeping with the histogram, three comments/suggestions:
- Could the NaN be excluded from the histogram?
According to the fine folks on #gdal (EvenR): "the pixels whose value
is nodata are excluded from the stats" - note that this is only the
nodata value considered by gdal - which isnt aware of any additional
nodata values you may have specified in the transparency tab.
- Could the X-axis numbers reflect the actual colour values instead
of a
fixed 0-300 range?
Yes I am going to do this.
Note that the X-axis of the histogram is spread on colours values,
thus the displayed X-axis numbers are meaningless
Right above should fix that.
- Could it be possible to add a zoom function on the histogram?
I believe so - I will have a play and see how easy that will be.
Thanks for the feedback!
Regards
Tim
Best regards,
Benoit
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