关键词: 图像增强, 图像美学, 构图优化, 基于样例的图像修复, 细缝裁减算法

Abstract: With the prevalence of digital cameras and smart phones，people can acquire digital images more and more conveniently． However，normal users are not satisfied with their photos constantly because they are not fami-liar with the professional knowledge of photography． In order to solve this problem，an approach of image aesthetic enhancement，which takes into consideration both the subject and the background layout of an image，is presented．
According to the rules of trisection and visual balance，this approach retargets the subject and resizes the certain part of background in an image to enhance image aesthetic quality by means of subject extraction，region borderline detection，exemplar-based image inpainting，seam carving and subject retargeting． Experimental results show that the proposed approach can enhance the aesthetics of image composition without deforming the salient objects in an image and without losing any image information．

Key words: image enhancement, image aesthetics, composition optimization, exemplar-based image inpainting, seam-carving algorithm