Hi Jukka, Sounds interesting. How would you envisage the Mapfile OUTPUTFORMAT looking in this case? Would it reference a VRT file ignoring any SourceFilename?
Seth -- web:https://geographika.net & https://mapserverstudio.net twitter: @geographika On Tue, Apr 23, 2024, at 4:58 PM, Rahkonen Jukka via MapServer-dev wrote: > Hi, > > I was experimenting with GDAL VRT and KernelFilteredSource > https://gdal.org/drivers/raster/vrt.html#kernelfilteredsource. My aim was to > sharpen aeriel photos a bit for helping visual image interpretation. I was > rather satisfied with the following that, I believe, is an unsharp mask > filter https://en.wikipedia.org/wiki/Kernel_(image_processing). Excerpt from > my VRT file: > > <KernelFilteredSource> > <SourceFilename relativeToVRT="1">P4433H.tif</SourceFilename> > <SourceBand>3</SourceBand> > <Kernel normalized="1"> > <Size>5</Size> > <Coefs> -0.00390625 -0.015625 -0.0234375 -0.015625 -0.00390625 > -0.015625 -0.0625 -0.09375 -0.0625 -0.015625 -0.0234375 -0.09375 1.859375 > -0.09375 -0.0234375 -0.015625 -0.0625 -0.09375 -0.0625 -0.015625 -0.00390625 > -0.015625 -0.0234375 -0.015625 -0.00390625 </Coefs> > </Kernel> > > I tested the sharpened VRT with QGIS and it works well. Now I wonder if it > could be possible to configure Mapserver to have KernelFiltered outputformats > driven by GDAL and VRT. Derived bands might be useful as well. Any thoughts? > > -Jukka Rahkonen- > _______________________________________________ > MapServer-dev mailing list > MapServer-dev@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/mapserver-dev >
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