Hi to all

I have gathered experience with Imagine Photogrammetry software processing 
Stereo Pleiades block (few models) for photogrammetric products (dsm, 
ortho')

for the rest activities (segmentation, classification ...) I use OTB 
application...

My Question is - can we do the photogrammetric steps (1 - Block adjustment, 
2- DSM, 3- Rectification) with OTB as well ? 

The answer should be yes - However when I go over the cookbook (e.g in 
4.2.5 residual registration, 5.7 stereo),  I do not see the first step - 
model triangulation - where we compute external orientation for the each 
images based on ground control and tie points (to enhance the model 
external / internal geometry and to set the local projection). 

1 - I need to match between the images and ortho (GCP points) - I will use 
existing ortho' for that, 
2 - I need to match between the two images to have the best stereo model 
(tie points)

*Is the following workflow is the right direction ?*

for step 1 - match between each image & existing ortho (for GCP) using 
otbcli_HomologousPointsExtraction - then use otbcli_RefineSensorModel for 
each image 
for step 2 - match between two stereo images               (for TIE) using 
otbcli_HomologousPointsExtraction - then use otbcli_RefineSensorModel for 
each image 

step 1 - GCP - can be done manually because the few number of points - I 
cannot see where to input the external GCP list...

then I will be able to continue and to extract DSM using Stereo Framework 

BR.

Ofer

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