基于粗糙集理论的自适应图像内插  

Adaptive Image Interpolation Based on Rough Set

作　　者：杜娟[1] 余英林[2] 谢胜利[2] 

机构地区：[1]北京理工大学信息科学技术学院电子工程系,北京100081 [2]华南理工大学电信学院广东,广州510641

出　　处：《北京理工大学学报》2005年第11期993-997,共5页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(60372068);广东省自然科学基金资助项目(011628)

摘　　要：利用粗糙集中的不可分辨理论提出了一种基于粗糙集理论和旋转掩模(rotating m ask)相结合的自适应图像内插算法.首先利用图像的连续性,提出了用粗糙集中的上近似集(upper approx im ation)和下近似集(low erapprox im ation)来确定与缺损点具有不可分辨关系的样本点,然后利用这些同类样本点对缺损点进行自适应的内插.实验结果表明,利用该算法内插的图像质量无论客观评价标准还是主观评价标准均好于传统的图像内插法,该算法是粗糙集理论与图像信息处理相结合的有益尝试.A new adaptive interpolation algorithm for still image is presented. The algorithm is based on the concept of indiscernibility relation in rough sets theory and incorporates a novel rotating mask, The sample points that are indiscernible to the loss point are first identified by applying the concept of upper and lower approximation based on the continuity of images. Then the lost point is further identified using the information of the sample points. Simulation results demonstrate that the new algorithm improves substantially the subjective and objective quality of the interpolated images over conventional interpolations. The algorithm represents an attempt to incorporate rough sets in image processing.

关 键 词：粗糙集 不可分辨关系 上近似 下近似 

分 类 号：TN911.73[电子电信—通信与信息系统]