Glossary
3D CARS common words and shortened terms are detailed here.
To update, follow glossary sphinx documentation in RST source documentation.
- CARS
means CNES Algorithms to Reconstruct Surface (ou Chaîne Automatique de Restitution Stéréoscopique en français)
- CNES
Centre National d’Etudes Spatiales
- core
Means the internal CARS function used as the engine core for steps and pipelines.
- disp
The short version of “disparity”
- disparity
The column difference between a pixel in the left image and its homologous pixel in the right image.
- DEM
Digital Elevation Model. Usually means all elevation models in raster: DSM, DTM,…
- DSM
Digital Surface Model. Represents the earth’s surface and includes all objects on it. CARS generates DSMs. See Digital Elevation Model
- DTM
Digital Terrain Model. Represents bare ground surface without any objects like plants and buildings You need another tool to generate DTM from CARS DSM. See Digital Elevation Model
- epi
A shortened version for “epipolar”. Simplify length of functions in CARS code.
- epipolar
Refer to epipolar geometry used as basis for CARS 3D pipeline.
- matching
Stereo matching or disparity estimation is the process of finding the pixels in the multiscopic views that correspond to the same 3D point in the scene.
- OTB
Orfeo Toolbox is an open-source project for state-of-the-art remote sensing applications.
- pipeline
In computing, a pipeline, also known as a data pipeline is a set of data processing elements connected in series, where the output of one element is the input of the next one. In CARS, pipeline orchestrates applications/functions to chain 3D steps to produce DSM.
- rectification
Image rectification is a transformation process used to project images onto a common image plane. In CARS, the epipolar geometry rectification is used.
- ROI
Region of Interest means a subpart of the DSM raster in CARS. It can be defined by a file or a bounding box.
- RPC
Rational Polynomial Coefficient
- SIFT
Scale-Invariant Feature Transform