In the past decade - particularly with the ability to mount digital optical devices on low cost Unmanned Aerial Vehicle (UAV) platforms - the generation of Digital Surface Models (DSM) based on stereo-optical images has become a major component for an extensive number of applications at local scale, such as mapping, virtual terrain reconstruction and visualisation, simulations, civil engineering, precision farming, precision forestry and others. This DSMs category complements the more conventional one based on spaceborne imagery, which, in the same period, has seen an important evolution in terms of resolution and acquisition technology (triplet).


Modules

Opticalscape is a modular set of functions supporting the generation of DSMs based on spaceborne and UAV stereo-optical data. The two modules are complemented by a multi-purpose tool including a wide range of functions, from image visualisation to cartographic and geodetic transforms.

Space
It supports the processing of all existing spaceborne optical stereo and tri-stereo data in terms of image orientation to automatic DSM and ortho-image generation. Key feature is the DSM generation, which is based on the most advanced algorithms thoroughly considering the new sensors characteristics. The figure - generated using SPOT-7 data - illustrates a 3D view of an industrial mine.

Main functionalities are:
    - Orientation of single, stereo and triplet imagery;
    - Ground Control Point and Tie Point measurement;
    - Derivation of quasi-epipolar images;
    - Automated DSM generation;
    - Generation of ortho-rectified images.

UAV stereo
It supports the processing of image pair series in terms of image orientation to automatic DSM and ortho-image generation. Key feature is the DSM generation, which is based on the most advanced algorithms, and the automated DSM and ortho-image mosaicing. In order to facilitate the image orientation, images must include a coarse platform position, while attitude data are not mandatory. The figure - which consists of 450 images - illustrates a 3D view of a sinkhole region.

Main functionalities are:
    - Orientation of multiple stereo pair;
    - Ground Control Point and Tie Point measurement;
    - Derivation of quasi-epipolar images;
    - Automated DSM generation and mosaicing;
    - Generation of ortho-rectified mosaics.


Further information

Opticalscape in a nutshell

Opticalscape is available under ENVI platform and is distributed by HARRIS Geospatial Solutions