基于Gabor滤波器的电泳电子纸图像滤波系统设计

采集电泳电子纸(EPD)的边缘纹理、鬼影图像时,需避免外界光照条件的干扰,包括光源方向、明暗和色彩等.针对EPD显示画面采集过程中受到的光干扰问题,设计了一种基于Gabor滤波器的图像滤波系统.对于受光干扰的单一灰阶图像,先通过Gabor滤波器降低光照变化和噪声对图像的影响,再通过闭运算进行边缘补偿;对于受光干扰的彩色图像,先提取图像的R、G、B分量,分别对各分量进行Gabor滤波,最后将3组分量重新组合成彩色图像.结果表明:该系统在单一灰阶图像、彩色图像中对光干扰的消除率分别达到39.9%和39.7%.研究结果对降低采集EPD图像时的光干扰具有重要意义.

The Design of Electronic Paper Image Filtering Based on Gabor Filters

The collection of the edge textures and the ghost image in electrophoretic display (EPD) requires avoiding the interference of outside light conditions, including the direction of the light source, lighting and shade, color and so on. A image filtering method based on Gabor filters is proposed to reduce the lighting interference in the process of collecting EPD images. For a single gray-scale image which is interfered by the lighting, the Gabor filters are used to reduce the influence of illumination variation and noise in the image, and then the edge compensation is performed by the closed operation. For the color image subjected to light interference, the R, G and B components of the image are extracted first. The components are then subjected to filtering with the Gabor filters, and finally the three components are recombined into the color image. The experimental results show that the elimination rate of light interference in single gray-scale image and color image is 39.9% and 39.7% respectively. The results of this study are of great significance in reducing the light interference introduced in EPD image collection.