A Correction Method for Angle Tilt of Line Scan Camera

Abstract

The invention discloses a correction method of angle inclination of a linear array camera. The method comprises the following steps: (1) scanning a correction plate by the linear array camera to detect boundary points of object areas on the correction plate; (2) fitting central point linear equations of each boundary point; (3) correcting an inclination angle of the linear array camera along a scanning direction according to an inclination degree of a straight line of the central points; and (4) calculating a length of a longest line of the object areas, and correcting the inclination angle of a scanning surface of the correction camera. The technical scheme is beneficial in that only the correction plate needs to be scanned, correction is carried out through the scanning results, and thus operation is simple, processing algorithm is simple, correction results are good in stability, and precision is high.

Description

technical field [0001] The invention relates to a detection method applied to camera installation angles, in particular to a method for correcting the angle inclination of a line array camera. Background technique [0002] In machine vision systems, image sensors are key components of the entire system. According to the collection method, there are two main categories: area scan camera and line scan camera. Due to its advantages of high scanning frequency and high resolution, line scan cameras are widely used in machine vision systems in the fields of industry, medical treatment, scientific research and security, especially some vision systems that require high-precision measurement. The correct installation angle of the line scan camera should be that the scanning direction is perpendicular to the moving direction of the target to be scanned, and the scanning plane is parallel to the target plane. If there is an angle tilt during the installation of the line scan camera, ...

AI Technical Summary

Problems solved by technology

Then, the resolutions in the X and Y directions of the image are respectively determined by the interval between the image sensor of the line scan camera and the trigger signal, so it is difficult to achieve complete consistency, and correction is required for this

However, in the current existing technology, when the calibration plate is being calibrated, there are requirements for the placement angle of the calibration plate. If there is a deviation, it will have more or less influence on the final calibration result.

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