Instrument pointer reading identification method

The invention discloses an instrument pointer reading identification method, and belongs to the technical field of instrument identification, and the method specifically comprises the steps: collecting an instrument image, preprocessing the instrument image, identifying an existing strip-shaped region, obtaining a linear equation through median filtering, calculating an intersection point of the linear equation, and setting a density center point of an intersection point set as an axis point; taking the axis point as an original point to obtain a polar coordinate image, preprocessing the polar coordinate image, and identifying a parallel strip-shaped region to obtain a scale line; identifying the numerical value of the character in the instrument image and the central point of the character after polar coordinate transformation, endowing the numerical value of the character with the closest scale line, and setting the angle of the pixel point closest to the axis point as the angle of the scale line; selecting