图像的逆滤波处理。图像滤波，即在尽量保留图像细节特征的条件下对目标像的噪声进行抑制，是图像预处理中不可缺少的操作，其处理效果的好坏将直接响到后续图像处理和分析的有效性和可靠性-Inverse image filtering. Image filtering, namely, to preserve image detail characteristics of the target under the conditions as to suppress noise, image pre-processing is an indispensable operation, the treatment effect of good or bad will directly affect the follow-up image processing and analysis of the effectiveness and reliability