原始的LBP算子定义在像素3*3的邻域内，以邻域中心像素为阈值，相邻的8个像素的灰度值与邻域中心的像素值进行比较，若周围像素大于中心像素值，则该像素点的位置被标记为1，否则为0。这样，3*3邻域内的8个点经过比较可产生8位二进制数，将这8位二进制数依次排列形成一个二进制数字，这个二进制数字就是中心像素的LBP值，LBP值共有2828种可能，因此LBP值有256种。中心像素的LBP值反映了该像素周围区域的纹理信息。(The original LBP operator is defined in the neighborhood of the pixel 3*3, with the neighborhood central pixel as the threshold, and the gray value of the 8 adjacent pixels is compared with the pixel value of the neighborhood center. If the surrounding pixels are larger than the central pixel value, the position of the pixel point is marked to 1 or 0. In this way, 8 points in the 3*3 neighborhood can generate 8 bit binary numbers, and the 8 bit binary numbers are arranged in turn to form a binary number. The binary number is the LBP value of the central pixel, and the value of the LBP is 2828 possible, so there are 256 kinds of LBP values. The LBP value of the center pixel reflects the texture information of the surrounding area of the pixel.)