Mon-Shieh Yang Ming-Chang Lin Jin-King Liu Ming-Chee Wu Automatic image classification of landslides improved with terrain roughness indices in various kernel sizes. 527-529 2010 conf/igarss/2010 IGARSS https://doi.org/10.1109/IGARSS.2010.5652504 db/conf/igarss/igarss2010.html#YangLLW10