Hi, I have just started using OTB 5.8.0 on ubuntu 16.04 LTS. I am
exercising examples in the cook book. But, now I am stuck with
otbcli_StereoRectificationGridGenerator.

I am running the grid generator with -epi.step 1 (which is default value)
on a world view 2 pan image as:
otbcli_StereoRectificationGridGenerator -io.inleft image1.tif -io.inright
image2.tif -epi.step 1 -io.outimage1 outimage1_grid.tif -io.outright
outimage1_grid.tif

But, the command hanged/stuck while writing outimage1_grid.tif. The command
worked very slow and did not utilize all cores on my PC. I will be grateful
if some let me know following:


   1. How does the grid generator make the transformation grid (algorithm
   ?), why it is so computationally expensive?
   2. Can I run the grid generator using mpirun -np 4
   otbcli_StereoRectificationGridGenerator -io.inleft image1.tif -io.inright
   image2.tif -epi.step 1 -io.outimage1 outimage1_grid.tif -io.outright
   outimage1_grid.tif?

I also noted that the grid generator worked nicely with -epi.step 5. But
the issue is I want to process the data at the full resolution (i.e., all
pixels in the raw image). How can I do that?


-- 
Kind Regards
M. Jahanzeb Malik

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