A calibration platform and calibration method for a machine vision camera

Abstract

The application discloses a kind of machine vision camera calibration platform and calibration method, wherein, calibration platform includes camera to be calibrated, six degrees of freedom parallel kinematic platform, annular light supplement lamp, calibration board and control module, calibration board is placed on six degrees of freedom parallel kinematic platform, and calibration board is driven to carry out multi-posture motion by six degrees of freedom parallel kinematic platform, method includes: by fuzzy PID control model setting annular light supplement lamp corresponding four illumination subareas of illumination intensity at each sampling position, at least 15 different spatial attitude calibration board's preferred gray scale is collected;Using adaptive threshold segmentation algorithm to extract the outline of calibration board and subpixel level edge outline of preferred gray scale extraction;Zhang Zhengyou calibration algorithm solves camera parameter.The present application solves the prior art, for complex lighting environment, calibration board image relies on post-processing software algorithm compensation, and compensation capacity is limited, and calibration board image quality is insufficient, resulting in the technical problem that camera calibration result is inaccurate.

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