LOCAL IMAGE CONTRAST ENHANCEMENT UNDER NONUNIFORM ILLUMINATION

摘要：

Most existing global contrast enhancement algorithm can not deal with high dynamic range images which are often under non-uniform illumination. Thus a simplified logarithmic transformation equation has been proposed in this paper to meet this demand. Furthermore a partially overlapped subblock method is also adopted to perform local contrast enhancement. For purpose of optimization, two contrast measures are used for finding optimal transformation parameters. They merge into a new algorithm, called POSLT (Partially Overlapped Sub-block Logarithmic transformation). POSLT exhibits good performance and Controllability even if it has high computational complexity. Our experimental results show its local adaptation for contrast enhancement, the results give firmly support to POSLT.

关键词： Contrast Enhancement High Dynamic Range Image logarithmic transformation Contrast Measure Subblock.

作者: JIAO Linan SUN Zhaoyun SHA Aimin

作者单位: College of Information Engineering, Chang’an University Middle Section in South of the Ring Road 2, 710064 Xi’an, China

会议类型: 国际会议

会议名称: International Technology and Innovation Conference 2009(2009技术与创新国际学术会议)

会议地点: 西安

会议语种:英文

页码: 1-5

在线出版日期: 2009-10-12（万方平台首次上网日期，不代表论文的发表时间）