Dear Ted,
Yes I am sure but it is really hard for us to answer such questions
without additional information. There might be several different
problems related to your data and parameters ... So please post :
- The complete set of command lines and outputs for each stage.
- The output of gdalinfo and otbcli_ReadImageInfo -keywordlist 1 for
each of the original input images.
I understand your point about picking gcps. That is something that we
might add to Monteverdi 2.0 once multi-image display is fully operationnal.
Regards,
Julien
Le 24/03/2014 18:45, Ted a écrit :
Dear Julien,
thanks for your fast reply. The .geom file was produced or kept by OTB
when applying the 'OrthoRectification' tool. I did the preprocessing
workflow starting with an original WV2 scene as described in your cook
book and in the following order:
1. OpticalCalibration
2. BundleToPerfectSensor
3. OrthoRectification
However, when comparing the orthorectified image with the preceding
pansharpened image I can see not a single pixel of shift throughout
the scene. Are you sure that ortho rectification can be done in the
last stage with the OTB toolset?
Concerning the RefineSensorModel with manually picked GDPs a tool for
manual GCP collection in Monteverdi would be very useful for any
future version. Monteverdi1 already includes something similar with
the HomologousPoints' menu entry but does not allow an export of the
coordinate list in a format and coordinate system required by the
'RefineSensorModel' tool. So currently I have to do uncomfortable
workarounds with diverse other software...
Thanks a lot,
Ted
On Wednesday, March 19, 2014 9:07:15 AM UTC+1, Julien Michel wrote:
Dear Ted,
Here are several things that might help you :
- Spot5 and WV2 spatial resolution and radiometric differences are
huge (not to mention the possible time gap and season change). You
should at least zoom out the WV2 to a SPOT5 equivalent resolution.
SIFT and SURF are tolerant to resolution change, but only up to a
certain point. Radiometric processing to make the image look
similar (like working on the same radiometric channel for instance),
- the HomologousPoints / RefineSensorModel workflow is not meant
to be used with both images already orthorectified. You can have
the reference image ortho, but at least the moving one should be
sensor. If you can not have this configuration, you can still
search for homolgous point and estimate a rigid transform from the
points on you own,
- I think there is a confusion in the metadata of the WV2 image.
Since it is already ortho, you should not have a geom file
anymore. Can you try to remove it ?
Regards,
Julien
--
Julien MICHEL
CNES - DCT/SI/AP - BPI 1219
18, avenue Edouard Belin
31401 Toulouse Cedex 09 - France
Tel: +33 561 282 894 - Fax: +33 561 283 109
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Julien MICHEL
CNES - DCT/SI/AP - BPI 1219
18, avenue Edouard Belin
31401 Toulouse Cedex 09 - France
Tel: +33 561 282 894 - Fax: +33 561 283 109
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