Methodology to automatic integration of digital aerial images and LIDAR data
DOI:
https://doi.org/10.5380/bcg.v13i2.10736Keywords:
automation, data integration, automatic exterior orientation, digital camera, LIDAR, automação, integração, orientação exterior automática, câmera digital, SPLAAbstract
This article presents a methodology for automatic integration between aerial digital
images and LIDAR data. The aerial and the LIDAR surveying were accomplished
in distinct times and in different flight missions. The intensity image was generated
by interpolation from 3D positions and laser pulse return information contained in
the LIDAR cloud points. The knowledge of the positions in both kind of image:
aerial digital image and intensity image, means to know the point position in the
image and object spaces. So these points could be considered as the control ones.
The matching among RGB image and LIDAR intensity image is not trivial due to
their accented radiometric differences. The images are automatically processed and
their point correspondence are based upon corners and edges detection, area based
matching, cross correlation coefficient, and 2D affine transformation. The process
finishes with the computation of the exterior orientation parameters using spatial
resection controlled by control points extracted automatically.
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