基于小波变换的彩色图像自适应细节增强算法  

ADAPTIVE DETAIL ENHANCEMENT ALGORITHM OF COLOUR IMAGE BASED ON WAVELET TRANSFORM

作　　者：徐涛[1] 李冠章[2] 

机构地区：[1]海军潜艇学院航海观通系,山东青岛266071 [2]国防科学技术大学机电工程与自动化学院,湖南长沙410073

出　　处：《计算机应用与软件》2011年第3期240-242,295,共4页Computer Applications and Software

摘　　要：针对彩色图像,提出了一种基于小波变换的自适应细节增强算法。首先选择了合适的彩色空间,保持图像的彩色分量不变,对其亮度分量进行小波变换,然后按照分解后的各级近似图像对比度自适应地调整小波细节系数,同时适当地增强近似系数以提高彩色图像的平均亮度,在处理过程中不需要设定额外的调整参数。实验证明,算法不但保留了图像较亮的细节,而且增强了较暗的细节,同时达到了图像色彩不失真的目的。A novel adaptive detail enhancement algorithm aiming at colour image is proposed in this paper based on wavelet transform.The first step is to select appropriate colour space,and then the luminance components of the image are being implemented wavelet transform while the chroma components are hold on.The detail wavelet coefficients are adjusted adaptively considering the contrasts of discomposed approximate images on each level while the approximate coefficients are increased properly to boost the average luminance of colour image,there is no extra adjustment parameters setting in the process of treatment.Experiments confirm that the algorithm preserves the brighter details of the image and improves the darker details in it too.Meanwhile the image colour distortion does not appear.

关 键 词：彩色图像 彩色空间 小波变换 自适应 细节增强 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]