Hi Chris,
In addition to what Jonathan said, I noticed that the minimum and
maximum disparity are quite large. Do you use a triple view from the
same orbit ?
This exploration in disparity has a strong impact on the computation
time. You could try to reduce the exploration along height, or use a DEM
instead of a default height.
Regards,
Guillaume
Le 12/08/2014 11:38, Jonathan Guinet a écrit :
Hi Chris,
using extractROI on your sensor image affects the origin of the
image, thus the RPC model remains valid, (it can be easilly checkerd
unsing gdalinfo)
Cheers,
Jonathan
2014-08-11 20:02 GMT+02:00 Chris <[email protected]
<mailto:[email protected]>>:
Hi,
I have been attempted to use OTB stereo image matching since 2012,
not got a chance to really let it work. And this time I involved
in much more time and it seems on the right track now.
I have previously post about OTB installation
<https://groups.google.com/forum/#%21searchin/otb-users/stereo$20framework/otb-users/wANoQ9oHhss/e-ZIQwpfnd0J>
and
stereo matching
<https://groups.google.com/forum/#%21profile/otb-users/APn2wQcDet7yykx6xh3fe498XOY19WsE1RahsL9BXiAXF1uKl8kubFdNmTygPJ0uJ1yemTMFJvwn/otb-users/kocntH7LjO8/lQfHi2maLQMJ>
problems
I have encountered. and I have checked some related post to my
work, such as here
<https://groups.google.com/forum/#%21searchin/otb-users/stereo$20framework/otb-users/xEoAwafKjCQ/MYq0XcAtyRMJ>:
I have a few issues:
1.
I *can now successfully *match an entire tile of triple-view
Pleiades image in about 2*10e4 seconds. Please see attached
Overview for this DSM.
Due to such a long computation time, I attempt to crop the image
first then match a subset image.
The entire Pleiades tile and subset image information, according
to otbcli_ReadImageInfo, is given in the attached
"Image_information_list.md".
#image subsetting
./otbcli_ExtractROI -in
/path/to/my/Pleiades/Pan/image/759.TIF -startx 1000 -starty
1000 -sizex 2000 -sizey 2000 -out
../../SubsetPleaides/Test_pan_759.tif
./otbcli_ExtractROI -in /path/to/my/Pleiades/Pan/image/771.TIF
-startx 1000 -starty 1333 -sizex 2000 -sizey 2000 -out
../../SubsetPleaides/Test_pan_771.tif
#stereo matching framework
./otbcli_StereoFramework -input.il <http://input.il>
"Test_pan_759.tif" "Test_pan_771.tif" -output.res 2
-output.out Test_Pan_759_771_DSM.tif -elev.default 272
-bm.maxhoffset 120 -bm.minhoffset -120 -bm.radius 3 -ram 6000
# report error:
2014 Aug 11 13:03:30 : Application.logger (INFO) Minimum
disparity : *-1.36259e+07*
2014 Aug 11 13:03:30 : Application.logger (INFO) Maximum
disparity : *1.36259e+07*
......
Writing Test_Pan_759_771_DSM.tif...: 0% [
]otbApplicationLauncherCommandLine:
/usr/include/ITK-4.5/itkImageConstIterator.h:208: void
......
Dimension: 2
Index: [-13625856, 1321]
Size: [2123, 660]
is *outside of buffered region *ImageRegion (0xd6dd20)
Considering the entire tile can match successfully, there should
be something wrong happens during the image crop using
"otbcli_ExtractROI"
I have included the "*.geom" files (for both original large tile,
and the subset image) generated by OTB attached to this post.
# the ".geom" of the entire tile is export through ReadImageInfo
./otbcli_ReadImageInfo -in
/path/to/my/Pleiades/Pan/image/759.TIF -outkwl
Entier_Pleiades_Tile_759.geom
# the ".geom" of the subset image is generated automatically by
./otbcli_ExtractROI -in
/path/to/my/Pleiades/Pan/image/759.TIF -startx 1000 -starty
1000 -sizex 2000 -sizey 2000 -out
../../SubsetPleaides/Subset_Pleiades_759.tif
I already compared these two *.geom files, and I notice there are
no significant changes.
What is the correct method to subset an large satellite image for
matching, preserving its RPC file?
2. What is the* supported RPC formats *for OTB in order load
geometry information correctly?
From a previous post it said RPC modules are inherited from OSSIM,
and all popular satellite formats are supported, such as
Worldview, GeoEye, etc.
The XML file comes with Pleiades image works well, but
user-defined XML after subsetting the Pleiades does not work any
more, even if in the same file name and location.
What happened underneath?
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<www.c-s.fr> *Guillaume PASERO*
Ingénieur d'études et développement
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APPLICATIONS*
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