关键词: 高斯滤波, 图像平滑, 色差, 双边滤波, 视觉灵敏度函数

Abstract: This paper presents a new automatic smoothing approach for color images.The method analyzes the human eyes by spatial frequency and Contrast Sensitivity Function（CSF），and defines the Gaussian mask by the viewing distance automatically.Then it utilizes the human visual mechanism of color detail blindness and simultaneous contrast，therefore decides the Gaussian mask according to the color difference and location between adjacent pixels.The algorithm can preserve the edges and details，while quickly smooth the image，and the results show its validity.

Key words: Gaussian filtering, image smoothing, color difference, bilateral filtering, Contrast Sensitivity Function（CSF）