保持边缘的低照度彩色图像增强算法  

An Enhancement Algorithm for Low-illumination Color Image with Preserving Edge

作　　者：王建卫[1] 

机构地区：[1]东北林业大学机电工程学院,黑龙江哈尔滨150040

出　　处：《计算机技术与发展》2018年第1期116-120,126,共6页Computer Technology and Development

基　　金：黑龙江省教育科学技术研究项目(12533020)

摘　　要：为了解决低照度彩色图像的边界提取不完整的问题,依据点处理和颜色空间变换理论,提出了应用非线性函数变换方法处理HSI颜色模型的强度分量的彩色图像增强方法。设计了基于非线性函数变换方法进行彩色图像增强的算法过程,并分析了算法中RGB和HSI颜色模型转换中强度分量计算公式的三种形式。通过实验将文中方法与对数函数变换、经典的直方图均衡化方法和小波增强方法进行比较,实验数据表明,该算法简单、适用性广,能够有效提高自然环境下采集的彩色图像的质量,像素值不必修正可直接应用一阶和二阶的边缘检测算子提取边缘。In order to solve the problem of incomplete boundary extraction of color images under the low light intensity environment, based on theory of pixel processing and color space transformation, we propose a method of processing intensity components of color images based on HSI color model through nonlinear function transformation. The processing of color image enhancement is presented based on nonlinear function transformation and three kinds of formula are also analyzed between RGB and HSI color model. In the experiments, the proposed method is compared with the logarithmic function transformation, the HSItogram equalization and the wavelet enhancement, which shows that it is simple and highly adaptive, and can effectively improve the quality of color images acquired in natural environment. The pixel values need no modification and directly extract the complete edge by means of edge detection operator with first or two order.

关 键 词：彩色图像 增强方法 保持边缘 非线性函数 HSI颜色空间 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]