非均匀图像亮度补偿的分割方法

Segmentation Method for Unevenly Image Brightness Compensation

为消除非均匀光照对图像分割效果的影响,提出了改进的动态型高斯同态滤波的亮度补偿新方法。将非均匀图像置于HIS色系下,在频域内对其亮度分量进行同态滤波,同时引入改进后的高斯高通滤波传递函数,并保持色调和饱和度不变,得到光照均匀的图像,进而利用Otsu算法对增强后的均匀图像进行分割。实验结果表明,文中所提方法能够使得到补偿后的图像明暗适中、视觉感好,且分割的精度与速度都较为理想。

Aiming at eliminating the effect of unevenly illumination on image segmentation, a new method of illumination compensation based on dynamic Gauss type filter is proposed. The unevenly image is in the HSI color system. , then the illumination component is filtered in frequency domain, and the improved Gauss high pass filter transfer function is introduced to it, keep the hue and saturation constant, then got the uniform image. At last use the Otsu algorithm for uniform image which was enhanced before. The experimental results show that the proposed method can make the image brightness and brightness moderate, and the visual sense is good. The accuracy of segmentation is more ideal.