@Article{isprs-annals-III-3-249-2016,
AUTHOR = {Zhang, Y. and Zhang, Y. and Zhang, Y. and Li, X.},
TITLE = {AUTOMATIC EXTRACTION OF DTM FROM LOW RESOLUTION DSM BY TWOSTEPS
SEMI-GLOBAL FILTERING},
JOURNAL = {ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences},
VOLUME = {III-3},
YEAR = {2016},
PAGES = {249--255},
URL = {https://isprs-annals.copernicus.org/articles/III-3/249/2016/},
DOI = {10.5194/isprs-annals-III-3-249-2016}
}