Pointer type instrument image identification reading and safety early warning method

The invention discloses a pointer type instrument image identification reading and safety early warning method. The method comprises the steps of using a camera for shooting the reading of a pointer type instrument installed on equipment to obtain a shot picture; matching the shot picture with the reading template picture, and correcting the shot picture; obtaining a first annular region of interest in the shot picture; obtaining an annular second region of interest in the reading template picture; subtracting the first region of interest from the second region of interest to remove scales andcharacters in the second region of interest; identifying a pointer region in the second region of interest, and converting a reading value of the pointer region in the second region of interest according to the scale range; judging whether the reading value is in a dangerous area or not; and if so, generating an alarm. Through the mode, the method disclosed by the invention can realize automaticreading and automatically