Hi,
The correlator project sort of does what I need, however, probably
without blending/fusing. On the other hand my images are already very
well georeferenced (with thin-plate spline and around 1000 points per
image) - so not really a need to correlate.
So I am actually more looking for a blending/fusing app that keeps
georeferencing.
I will probably ask at the gdal list as well to see if someone has an
idea.
For my panoramic photography I use either hugin or autopano giga. Both
do an excellent job with blending, but I fear they would delete my
georeferencing data and I don't know if they can handle the big files I
have.
Andreas
Am 2014-12-10 19:21, schrieb Michael Treglia:
Hi Andreas,
I'm Bringing this back to the list, as others here probably have some
better thoughts than I do. Googling around, I found this tool which
might be useful (?), though I can't tell how it handles overlaps
[haven't even downloaded it...]:
https://trac.osgeo.org/gdal/wiki/Correlator [4]
Not sure about enblend (can't access the site right now)
Depending on how different the images are, you could just try
mosaicing and see what it looks like (gdal_merge takes the values of
last image added for overlaps). If there's a way to standardize
color values based on brightness, or by RGB bands, that might help,
either before or after mosaicing. (might depend on if you're dealing
with multi-band image, or single band? - it would be fairly easy on
multi-band like Landsat)
Hope that helps,
mike
On Wed, Dec 10, 2014 at 9:28 AM, Andreas Neumann <[email protected]>
wrote:
Hi Michael,
I have 4 images with approx 30% overlap in each axis (north/east).
I would like to mosaic the images to get a single big images
covering the full area.
I hope that the images are nicely blended into each other so I
don't see the the seam/border of the original images - I was hoping
to get something similar to "enblend/enfuse"
(http://enblend.sourceforge.net [1]). I don't think that
enblend/enfuse keeps my georefencing - or does it?
Andreas
On 10.12.2014 16:10, Michael Treglia wrote:
Hi Andreas,
Do you mean that you want to effectively create a stack of rasters
(i.e., multi-band raster)? If not, we might need some more details.
If so, the Raster Merge operation (using gdal_warp) should work -
go to Raster -> Miscellaneous -> Merge, and check the box for "Layer
Stack" (http://www.gdal.org/gdal_merge.html [2]).
You can also do that in SAGA via Import/Export -> GDAL/OGR -> GDAL:
Export Raster, and add multiple grids, though this is a bit more
constrained and I think needs to have all layers in the same
Resolution.
This is also do-able in R using the Raster package, look into
"brick", "stack", and "writeRaster"
hope that helps,
Mike
On Wed, Dec 10, 2014 at 8:00 AM, Andreas Neumann
<[email protected]> wrote:
Hi,
I georeferenced four overlapping aerial images - with QGIS/GDAL and
the thin plate spline method. Now I want to mosaick/blend the
overlapping images. Are there any good FOSSGIS tools available that
support mosaicking with blending? Perhaps with SAGA/GRASS/OTB? Any
recommendations?
Thanks for any pointers/tutorials.
Andreas
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Links:
------
[1] http://enblend.sourceforge.net
[2] http://www.gdal.org/gdal_merge.html
[3] http://lists.osgeo.org/mailman/listinfo/qgis-user
[4] https://trac.osgeo.org/gdal/wiki/Correlator
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