@Article{isprs-archives-XLII-4-W20-77-2019,
AUTHOR = {Song, Q. and Hu, Y. G. and Hou, M. L.},
TITLE = {STUDY ON EXTRACTION AND EXPRESSION METHODS OF BULGING DISEASES IN ANCIENT CITY WALLS},
JOURNAL = {The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences},
VOLUME = {XLII-4/W20},
YEAR = {2019},
PAGES = {77--82},
URL = {https://isprs-archives.copernicus.org/articles/XLII-4-W20/77/2019/},
DOI = {10.5194/isprs-archives-XLII-4-W20-77-2019}
}