Method and device for detecting noise point in image, computer-readable storage medium

The invention discloses a method and a device for detecting noise points in an image. A computer-readable storage medium comprises the following steps of: selecting a size of a detection block according to a length of handwriting in the image; The absolute value of the difference between the pixel value of the center pixel point of the detection block and the pixel value of the surrounding pixel point of the center pixel point is calculated, and the absolute value of the difference is compared with a preset threshold value to determine whether the center pixel point is a noise point or not. According to the length of the handwriting in the image, select the size of the corresponding detection block, By comparing the absolute value of the difference between the pixel value of the center pixel point and the pixel value of the surrounding pixel point with the preset threshold value, whether the center pixel point is a noise point is judged, the probability of erroneously judging the handwriting as a noise point