[gdal-dev] Feature request: gauss and other interpolations in gdalwarp

[Etienne Tourigny]

I have committed new warping methods average and mode to trunk, this will
be part of gdal-1.10


On Tue, Apr 9, 2013 at 10:01 AM, Etienne Tourigny
<etourigny.dev at gmail.com>wrote:

> The patch works successfully - it was a build environment problem.
>
>
> On Mon, Apr 8, 2013 at 3:17 AM, John Twilley <mathuin at gmail.com> wrote:
>
>> Thank you, Etienne, for writing this code.  I greatly appreciate it!
>>
>> I updated my svn checkout, then applied your patch with no errors.  I
>> tried to warp my landcover files which use color tables (which is why mode
>> is so important to me) and they did not work.  Here is the output:
>>
>> jmt at nala:~/git/mathuin/TopoMC$ /home/jmt/svn/gdal/apps/.libs/gdalwarp
>> --debug -multi -tr 6 6 -te 2087232 2395968 2104512 2410176 -r mode
>> regions/Provincetown/Datasets/L1L.tif L1L-new.tif
>> Copying color table from regions/Provincetown/Datasets/L1L.tif to new
>> file.
>> Creating output file that is 2880P x 2368L.
>> Processing input file regions/Provincetown/Datasets/L1L.tif.
>> Warning: Input file regions/Provincetown/Datasets/L1L.tif has a color
>> table, which will likely lead to bad results when using a resampling method
>> other than nearest neighbour. Converting the dataset prior to 24/32 bit is
>> advised.
>> ERROR 5: GDALWarpOptions.Validate()
>>   eResampleArg=6 is not a supported value.
>> jmt at nala:~/git/mathuin/TopoMC$
>>
>> Let me know if I can provide any additional information to help you out!
>>
>> Jack.
>>
>> --
>> mathuin at gmail dot com
>>
>>
>> On Sun, Apr 7, 2013 at 1:19 PM, Etienne Tourigny <etourigny.dev at gmail.com
>> > wrote:
>>
>>> I have implemented mode and average warping algorithms, based on those
>>> used in overview creation.
>>>
>>> http://trac.osgeo.org/gdal/ticket/5049
>>>
>>> This code has been tested on a few datasets (see attachments) with all
>>> datatypes (Byte, Int, Float) but not all cases have been looked into (e.g.
>>> color tables, various projections).
>>>
>>> Any feedback and testing would be appreciated.
>>>
>>> Cheers
>>> Etienne
>>>
>>>
>>> On Wed, Mar 27, 2013 at 6:13 PM, John Twilley <mathuin at gmail.com> wrote:
>>>
>>>> I'm interested in this feature request as well.  Adding the mode
>>>> resampling algorithm to gdalwarp would be very beneficial to my projects,
>>>> right up there with being able to access the warp API from Python.  Is this
>>>> at all possible?  Should I submit a feature request on Trac, or what?  Just
>>>> let me know!
>>>>
>>>> Jack.
>>>>
>>>> --
>>>> mathuin at gmail dot com
>>>>
>>>>
>>>> On Mon, Feb 18, 2013 at 8:17 AM, Jan Hartmann <j.l.h.hartmann at uva.nl>wrote:
>>>>
>>>>>
>>>>>  Hi devs,
>>>>>
>>>>> Would it be possible to add gauss and other interpolations to
>>>>> gdalwarp? At the moment I georeference large scans to 2000*2000 tiles at
>>>>> the most detailed scale, and then create 2000*2000 tiles at resolutions of
>>>>> 2, 4 6 etc  times the original scale, using gdaladdo and gauss or other
>>>>> interpolations. It would help immensely if I could do that directly with
>>>>> gdalwarp.
>>>>>
>>>>>
>>>>> Funding would probably no problem. The question is: can and should it
>>>>> be done?
>>>>>
>>>>> Jan
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> gdal-dev mailing list
>>>>> gdal-dev at lists.osgeo.org
>>>>> http://lists.osgeo.org/mailman/listinfo/gdal-dev
>>>>>
>>>>
>>>>
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>>>>
>>>
>>>
>>
>
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