A Novel Otsu Method Based on Prior Area Information for Concealed Target Detection in PMMW ImagesJintao Xiong, Simeng Li, Jianyu Yang, Xiaopeng Xue, Jingqi Mao and Zenan MaoMATEC Web of Conferences, 59 (2016) 08002DOI: https://doi.org/10.1051/matecconf/20165908002