Image global automatic calibration method and device and related equipment

• Main Authors: YANG HAIDONG, ZHANG PENGZHONG
• Format: Patent
• Language: Chinese; English
• Published: 26.08.2022
• Subjects: CALCULATING; COMPUTING; COUNTING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS

The invention provides an image global automatic calibration method and device and related equipment. The image global automatic calibration method comprises the following steps: pre-selecting a calibration plate with a preset standard specification; detecting the radius and the center distance of a black dot according to a calibration plate with a preset standard specification; obtaining a calibration area of calibration point distribution according to the calibration plate; in the calibration area, the edges of the calibration points are extracted through image Blob analysis and a Canny edge detection algorithm, and finally image circle center coordinates of 49 calibration points are obtained; extracting coordinates of 49 calibration points under an image coordinate system and coordinates under a world coordinate system; solving an affine transformation matrix from an image coordinate system to a world coordinate system through a nine-point calibration algorithm according to the extracted coordinates of the