一种改进的色调不变的彩色图像增强算法  

An Improved Preserving Hue Color Image Enhancement Algorithm

作　　者：徐义春[1] 陈炼[1] 于海洋[2,3] 周敦广[1] 

机构地区：[1]三峡大学计算机与信息学院,湖北宜昌443002 [2]国家农业信息化工程技术研究中心,北京100097 [3]农业部农业信息技术重点实验室,北京100097

出　　处：《计算机仿真》2015年第9期281-285,共5页Computer Simulation

基　　金：国家自然科学基金(61272237);国家高技术研究发展计划(863计划):微小型无人机遥感信息获取与作物养分管理技术(2013AA102303);"十二五"农村领域国家科技计划(863)课题"农田小生境监测无线传感器网络开发"(2013AA10230207)

摘　　要：色调是色彩的重要属性,反应了色彩的的基本颜色。在彩色图像的增强中,保持图像的色调不变显得尤为重要。为此提出了一种保持色调不变的彩色图像增强方法。HSV色彩空间中,通过同比例缩放每个像素的三个色彩分量和处理gamut(色域)问题,可以保证色彩的色调不变。其中缩放因子可以通过灰度增强算法计算所得。通过与其它色调不变的彩色图像增强算法比较,针对质量不同的彩色图像,上述算法都能取得比较满意的效果,表明本算法具有一定的适应性。Hue is an important attribute of color, which reflects the basic color of the colors. Therefore, in the color image enhancement, keeping image hue constant is particularly important. According to the definition of hue in the HSV color space, by scaling the three components of each pixel with the same zoom factor and handling the gamut problem, the hue of color can be guaranteed the same. The zoom factors can be calculated by certain gray enhance- ment algorithm. This paper presented a new and efficient method which addresses gamut issues to achieve the hue un- changed and selects a proper gray enhancement algorithm to calculate the zoom factors. Compared with the other pre- serving hue color image enhancement algorithms, for the different quality of different color images, this algorithm can obtain satisfactory effect, which shows that the algorithm has certain adaptability.

关 键 词：彩色图像增强 色调不变 色域问题 直方图 

分 类 号：TP317[自动化与计算机技术—计算机软件与理论] TP391[自动化与计算机技术—计算机科学与技术]