23 August 2021 Quality analysis of Worldview-4 DSMs generated by least squares matching and semiglobal matching
Umut G. Sefercik, Mehmet Alkan, Karsten Jacobsen, Can Atalay, Gurcan Buyuksalih
Author Affiliations +
Abstract

For the estimation of a dense disparity map from a rectified space-borne stereo image pair and generation of the most qualified digital surface model (DSM), new image matching algorithms are being developed. Our study has two main goals of the DSM quality validation of Worldview-4 (WV-4), which offers the highest ground sampling distance (GSD) (30 cm) of civilian optical space-borne missions together with Worldview-3 (WV-3), and performance comparison of semiglobal matching (SGM) and least squares matching (LSM), two of the most preferred image matching algorithms for space-borne data. In the Istanbul study area with a rough topographic structure, 1 m gridded DSMs were derived from geometrically corrected WV-4 stereo image pairs. The qualities were estimated by well-rounded visual and statistical approaches based on standard deviation and normalized median absolute deviation. In model-to-model comparisons, a very high-resolution airborne laser scanning (ALS) DSM was utilized as the reference model. The results demonstrated that the WV-4 DSM derived by SGM has the standard deviation of ±0.51  m (1.7 GSD) in height in open areas, whereas the LSM DSM has ±1.46  m. In addition, the visual quality of SGM is much better than LSM through building description potential.

© 2021 Society of Photo-Optical Instrumentation Engineers (SPIE) 1931-3195/2021/$28.00 © 2021 SPIE
Umut G. Sefercik, Mehmet Alkan, Karsten Jacobsen, Can Atalay, and Gurcan Buyuksalih "Quality analysis of Worldview-4 DSMs generated by least squares matching and semiglobal matching," Journal of Applied Remote Sensing 15(3), 034515 (23 August 2021). https://doi.org/10.1117/1.JRS.15.034515
Received: 7 April 2021; Accepted: 9 August 2021; Published: 23 August 2021
Lens.org Logo
CITATIONS
Cited by 6 scholarly publications.
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Statistical analysis

3D modeling

Visualization

Satellites

Synthetic aperture radar

Image quality

Digital imaging

Back to Top