计算机辅助设计与图形学学报
計算機輔助設計與圖形學學報
계산궤보조설계여도형학학보
Journal of Computer-Aided Design & Computer Graphics
2015年
10期
1900-1906
,共7页
图像增强%平均交互信息%人眼感知亮度%临界可见偏差%动态规划
圖像增彊%平均交互信息%人眼感知亮度%臨界可見偏差%動態規劃
도상증강%평균교호신식%인안감지량도%림계가견편차%동태규화
image enhancement%average mutual information%perceived brightness%just noticeable difference%dynamic programming
为了实现人眼感知信息最大化,结合人眼视觉系统亮度阈值特性提出一种具有目标函数的图像增强算法。首先在全局灰度映射约束条件下给出感知图像的计算方法,并以感知图像与原图像之间的互信息作为目标函数;然后采用动态规划算法实现了全局最优的灰度合并策略,以合并图像中人眼无法分辨的灰度;最后通过调整合并后灰度的取值实现目标函数最大化。实验结果表明,该算法具有良好的图像增强效果,所提目标函数合理有效。
為瞭實現人眼感知信息最大化,結閤人眼視覺繫統亮度閾值特性提齣一種具有目標函數的圖像增彊算法。首先在全跼灰度映射約束條件下給齣感知圖像的計算方法,併以感知圖像與原圖像之間的互信息作為目標函數;然後採用動態規劃算法實現瞭全跼最優的灰度閤併策略,以閤併圖像中人眼無法分辨的灰度;最後通過調整閤併後灰度的取值實現目標函數最大化。實驗結果錶明,該算法具有良好的圖像增彊效果,所提目標函數閤理有效。
위료실현인안감지신식최대화,결합인안시각계통량도역치특성제출일충구유목표함수적도상증강산법。수선재전국회도영사약속조건하급출감지도상적계산방법,병이감지도상여원도상지간적호신식작위목표함수;연후채용동태규화산법실현료전국최우적회도합병책략,이합병도상중인안무법분변적회도;최후통과조정합병후회도적취치실현목표함수최대화。실험결과표명,해산법구유량호적도상증강효과,소제목표함수합리유효。
In order to achieve the maximum of human eye perceived image information, an image enhancement algorithm with objective function was proposed considering human visual system brightness threshold charac-teristic. Firstly, put forward a method to obtain perceived image under the global grayscale map constraints, and make the mutual information between perceived image and the original image as objective function; Sec-ondly, achieve a global optimum grayscale merger strategy by using dynamic programming algorithm to merge the grayscales which human eye could not distinguish; Finally, adjust the combined grayscale to maximize the objective function. Experimental results demonstrate the proposed algorithm has a good treatment effect, and the proposed objective function is reasonable and effective.