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tri-stériscopie par images satellite PLEIADES
http://forum-micmac.forumprod.com/viewtopic.php?f=16&t=1971
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Author:  EL ABDELLAOUI [ 19 Feb 2021, 09:47 ]
Post subject:  tri-stériscopie par images satellite PLEIADES

Bonjour à tous,

Je cherche à calculer un MNS à partir de la tri-stériscopie par images satellite PLEIADES, Le traitement est-il réalisable à partir de la chaine de traitement simplifié Tapioca/Tapas/Malt? quels sont les paramètres à utiliser dans l'étape de la calibration (TAPAS) pour mon cas? et pas mal d'autres questions.

Je veux bien échanger avec quelqu'un qui a une expérience sur ce type de manipulation.

Merci d'avance.

Author:  Luc.Girod [ 19 Feb 2021, 11:48 ]
Post subject:  Re: tri-stériscopie par images satellite PLEIADES

Hei,

The micmac documentation has a whole section about this. You can also use the script for Pleiades data found here : https://github.com/luc-girod/MicMacWorkflowsByLucGirod

Author:  ValkanSot [ 19 Feb 2021, 14:10 ]
Post subject:  Re: tri-stériscopie par images satellite PLEIADES

As Luc replied, you can follow the examples from the PDF (e.g. section 4.5.1) DocMicMac or the SatPleiades-1.sh script from the link he provided.

A typical workflow (suitable for most cases) is Convert2GenBundle -> (SateLib CropRPC) -> Tapioca -> Campari -> Malt Ortho/UrbanMNE -> (Nuage2Ply) (using only RPC model)
Malt variants are used for satellite terrain extraction, other tools like PIMs or C3DC won't work with satellite sensors (as far as I know).
As MicMac ingests the satellite sensor model (RPC), Tapas is not needed and processing can continue with Campari. You can either run it for selected image pairs or all three at once (in case of tri-stereo data).

Remember that MicMac will run with TIF files, so if there's another format (JP2) you should convert them before running MicMac commands.

Author:  Luc.Girod [ 26 Feb 2021, 10:39 ]
Post subject:  Re: tri-stériscopie par images satellite PLEIADES

Quote:
Remember that MicMac will run with TIF files, so if there's another format (JP2) you should convert them before running MicMac commands.


And that isn't super super trivial. I found that using this works best (on panchromatic images):
Quote:
convert IMG.........JP2 -depth 16 IMG............TIF

Author:  EL ABDELLAOUI [ 04 Mar 2021, 00:28 ]
Post subject:  Re: tri-stériscopie par images satellite PLEIADES

thanks for ur answers,
please for the malt phase, i should necessarily generate ortho before the DSM or I can only generate the DSM directly

Author:  ValkanSot [ 07 Mar 2021, 20:33 ]
Post subject:  Re: tri-stériscopie par images satellite PLEIADES

No ortho production is necessary, you can just create a DSM file.

If you want to skip orthomosaic creation, use the parameter DoOrtho=0 in the Malt command.

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