Hi,
Yes I think you could run these tools on your source images, but as I
said earlier, you should first tune the parameters on small extracts :
- use the ExtractROI application to take small extracts from your stereo
pair (let say 1024x1024 pixels). Make sure the two extract have a good
overlap. They should cover nearly the same area on ground, but it
doesn't have to be 100% accurate overlap, the stereo tools can deal with it.
- use the panchromatic images (or a pan-sharpened band depending on your
products)
- when you opened your image pair in erdas, were they overlapping ? was
the geolocation okay ?
Regards,
Guillaume
Le 11/12/2014 20:22, Majed AL-Sabri a écrit :
Dear Guillaume ,
thank you for your help ,
i mean ,are there any steps before StereoFramework tools ,
Can i use them direct ,from source ,
when i open my images pair in erdas by DIM file , the two images
were not in same location (not registration )
thank you ,
On Thursday, December 11, 2014 11:37:10 AM UTC+3, Guillaume Pasero wrote:
Hi,
I don't really understand what you want to do on your stereo pairs
before stereo tools.
If you want to take an extract of the full product, you can use
the *ExtractROI* application.
What do you mean by "20m different between the two images" ?
Regards,
Guillaume
Le 10/12/2014 19:43, Majed AL-Sabri a écrit :
dear Guillaume,
thank you very much for your help ,
i mean the steps before StereoFramework tools ,
i have many cities Stereo pair from Pléiades ,with (JP2)Format
and RPC, and there is about 20 m different between the two
images (pair ) when i open them ?
which tools is used before StereoFramework ,?
thank you
On Tuesday, December 9, 2014 12:02:41 PM UTC+3, Guillaume Pasero
wrote:
Hi,
The StereoFramework tool is designed to chain all the steps
of stereo-reconstruction. If you want to execute the
different steps separately (epipolar geometry, block
matching, projection to ground), you can follow the
guidelines in the CookBook :
http://orfeo-toolbox.org/CookBook/CookBookse16.html#x76-1290004.6
<http://orfeo-toolbox.org/CookBook/CookBookse16.html#x76-1290004.6>
As I said before, begin with a small extract and try to find
the optimal parameters, mostly regarding the block matching step.
Regards,
Guillaume
Le 06/12/2014 22:25, Majed AL-Sabri a écrit :
dear sir ,
can you please give me the answer ,for :Initial steps for
stereo extraction from Pléiades ?
i have a project with Pléiades images ,
regards
On Tuesday, October 28, 2014 11:36:31 AM UTC+3, Guillaume
Pasero wrote:
Hi,
Could you specify the settings you are using ?
If you want to learn exactly how the tool is working,
try to process small extracts ( for instance 512x512).
Try to figure the parameters that work the best,
optimize the search interval to reduce computation time,
then move on to the full image.
Regards,
Guillaume
Le 23/10/2014 15:30, AL a écrit :
Ok I figured out the stereo framework tool, but now I
have instability issue of the application, see post:
https://groups.google.com/forum/#!topic/otb-users/hVZqD_8_xeU
<https://groups.google.com/forum/#%21topic/otb-users/hVZqD_8_xeU>
On Tuesday, October 21, 2014 6:20:46 PM UTC+2, AL wrote:
Hello,
I'm new at OTB but not in photogrammetry. I just
received my stereo pair of Pléiades images and now
I'd like to extract the topography form it.
As far as I understand, OTB/Orfeo seems able to do
this, but after spending a while in the docs, I was
not able to find any piece of information regarding
the initial steps.
Can someone post something (doc, link, anything) on
that topic ?
Thanks
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