点运算 只根据对应像素的输入灰度值决定该像素输出灰度值的图像处理运算对比邻域运算
Point operation is an image processing operation that only determines the output gray value of the corresponding pixel based on the input gray value of the pixel, and is compared to neighborhood operation
以上为机器翻译结果，长、整句建议使用 人工翻译 。