3.6.7 Algorithm outline
The following algorithms are used in the application: For each sensor pair
- Compute the epipolar deformation grids from the stereo pair (direct and inverse)
- Resample into epipolar geometry with BCO interpolator
- Create masks for each epipolar image : remove black borders and resample input masks
- Compute horizontal disparities with a block matching algorithm
- Refing Disparities to sub-pixel precision with a dichotomy algorithm
- Apply an optional Median filter
- Filter disparities based on the correlation score (optional) and exploration bounds
- Translate disparities in sensor geometry
- Convert disparity map to 3D map
Then fuse all 3D maps to produce DSM with desired geographic or cartographic projection and
parametrizable extent.