【摘要】 微光图像中含有的噪声点具有椒盐噪声的特点,对图像进行小波变换,然后根据噪声的特点仅对其高频小波系数进行小波重构,重构后得到含有细节和噪声点的图像;根据重构图像的直方图的特点,对重构图像进行阈值处理,得到只含有噪声点的图像。根据小波变换提取的噪声点位置,对含噪的微光图像进行中值滤波处理,消除掉微光图像中的椒盐噪声。克服了中值滤波方法的边缘模糊的缺点,保持了微光图像中的细节部分。更多还原

【Abstract】 Yawp points included in twilght images has the specialies of salt-pepper yawp,so we carry through wavelet transformation for images then according to the specialties of vawp,We only carry through wavelet reconstruction for higy frequency wavelet coefficient,then again we can get images which include detail and yawp points.According to the specialties of histogram of reconstructive image,we dispose threshold value of reconstructive images,and we can get the images which onoy include yawp poonts.According to the position of yawp points obtained by wavelet transformation,we carry through median filtering disposal for twilight images inclouding yawp,elimination salt-pepper yawp of twilight images.This method conquered brim illegibility of median filtering,and moreover,it can maintain detail portion of twilight miage.更多还原