现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2013年
24期
77-80,85
,共5页
Retinex算法%图像去雾%三边滤波器%双边滤波器
Retinex算法%圖像去霧%三邊濾波器%雙邊濾波器
Retinex산법%도상거무%삼변려파기%쌍변려파기
Retinex algorithm%image defogging%trilateral filter%bilateral filter
针对传统Retinex算法采用高斯滤波估计图像的照射分量易产生边缘模糊，不能有效去除脉冲噪声且处理后的图像颜色易失真等问题，提出一种基于三边滤波的Retinex图像去雾算法。该算法利用三边滤波器估计图像的照射分量，三边滤波器继承了双边滤波器既可以有效降低图像加性高斯噪声又可以保持图像边缘细节的特性，同时又解决了双边滤波器与高斯滤波器不能有效滤除脉冲噪声，易产生伪边缘等问题。为验证该算法的有效性，采用5种不同的客观评价参数对处理后的图像进行评价。实验证明，该算法能有效地改善雾天图像的退化现象，提高图像的清晰度。
針對傳統Retinex算法採用高斯濾波估計圖像的照射分量易產生邊緣模糊，不能有效去除脈遲譟聲且處理後的圖像顏色易失真等問題，提齣一種基于三邊濾波的Retinex圖像去霧算法。該算法利用三邊濾波器估計圖像的照射分量，三邊濾波器繼承瞭雙邊濾波器既可以有效降低圖像加性高斯譟聲又可以保持圖像邊緣細節的特性，同時又解決瞭雙邊濾波器與高斯濾波器不能有效濾除脈遲譟聲，易產生偽邊緣等問題。為驗證該算法的有效性，採用5種不同的客觀評價參數對處理後的圖像進行評價。實驗證明，該算法能有效地改善霧天圖像的退化現象，提高圖像的清晰度。
침대전통Retinex산법채용고사려파고계도상적조사분량역산생변연모호，불능유효거제맥충조성차처리후적도상안색역실진등문제，제출일충기우삼변려파적Retinex도상거무산법。해산법이용삼변려파기고계도상적조사분량，삼변려파기계승료쌍변려파기기가이유효강저도상가성고사조성우가이보지도상변연세절적특성，동시우해결료쌍변려파기여고사려파기불능유효려제맥충조성，역산생위변연등문제。위험증해산법적유효성，채용5충불동적객관평개삼수대처리후적도상진행평개。실험증명，해산법능유효지개선무천도상적퇴화현상，제고도상적청석도。
A Retinex image defogging algorithm based on trilateral filtering is proposed in this paper to avoid edge fuzzi-ness,impulse noise and color distortion in traditional Retinex algorithm. In the new algorithm,the trilateral filter is adopted to estimate the illumination component on image. The trilateral filter is utilized to replace Gaussian filter and bilateral filter,both of which can not effectively filter the pulse noise but are easy to produce false edge. Trilateral filter can preserve the image’s edges while it suppresses the additive white Gaussian noise as the bilateral filter does. Five different objective evaluation parame-ters are used to evaluate the disposed images to prove the effectiveness of the algorithm proposed in this paper. Experiment re-sults show that this algorithm can effectively improve the degradation of foggy images and enhance their definition.
