【摘要】 为了消除光照对彩色图像的影响,提出了一种基于同态滤波的光照补偿方法。在频域内采用同态滤波对图像进行处理,然后将巴特沃斯高通滤波传递函数引入同态滤波器中,设计出一种新的动态巴特沃斯同态滤波器,增强图像在YIQ色彩空间中的亮度分量,并保持图像色度分量不变。在增加图像高频分量的同时,削减低频分量,弥补由光照不足引起的图像质量下降,最终实现对图像的光照补偿。实验结果表明,该方法在弱化光照影响,提高图像质量方面具有良好的性能,是一种比传统高斯高通滤波和直方图均衡更有效的彩色图像光照补偿方法。更多还原

【Abstract】 To eliminate the illumination influence to color image,an illumination compensation method based on homomorphic filtering is proposed.In frequency range,the homomorphic filtering is employed to process the image,and the Butterworth high pass filtering function is introduced into the homomorphic filter to design a new dynamic Gauss homomorphism filter.Then the luminance component of the image in YIQ color space is enhanced and the chrominance component maintains invariable,by which the high frequency component is increased while the low frequency component is reduced,the image quality drop caused by illumination insufficiency is relieved.Finally,the image illumination compensation is achieved.Experimental results demonstrate that the proposed method,which performs well in weakening illumination effect and improving image quality,is more effective to illumination compensation for color image than conventional Gauss high filtering and histogram equalization.更多还原