Target identification method based on automatic illumination evaluation

The invention relates to a target identification method based on automatic illumination evaluation. The method comprises the following steps: a. acquiring a target image and segmenting the target image into a plurality of pieces; b. computing the average gray of each image piece after segmentation; c. computing the average gray of the target image and the mean square deviation of the gray of the image pieces according to the normalized average gray value of each image piece obtained through computation; d. computing the gray difference of the average gray values of the left and right neighboring segmented image pieces and the average and mean square deviation of the gray difference of the left and right neighboring image pieces; e. computing the gray difference of the average gray values of the upper and lower neighboring segmented image pieces and the average and mean square deviation of the gray difference of the upper and lower neighboring image pieces; f. judging the illumination conditions of the target image according to the computation results in the steps c, d and e; and g. carrying out illumination processing and identification on the target image according to the illumination conditions obtained in the step f. The method has the following advantages: the steps are simple; and the accuracy of target identification is improved.