Sigmoid function adaptive X-ray image enhancement based on image median
LIU Li-mei1, WANG Yun-qiong1, SUN Yong2, YANG De-qiang1, ZHAO Yang1
1.The Department of Information, Yunnan Normal University, Kunming 650092, China;2.Department of Radiology, the Second Affiliated Hospital of Kunming Medical University, Kunming 650092, China