Method and system for judging whether the line frequency of a line array camera matches the moving speed of an object

Abstract

The present application discloses a method and system for judging whether the line frequency of a line array camera matches the moving speed of an object. The method includes: aligning and fixing the checkerboard target image on the object to be measured, and setting the line frequency and line frequency of the line array camera. The movement speed of the object; collect the checkerboard image taken by the line array camera; perform tilt correction on the checkerboard image; obtain the horizontal and vertical lengths of the checkerboard in the corrected checkerboard image; according to the horizontal and vertical lengths of the checkerboard The side length calculates how well the line scan camera line frequency matches the object's motion speed. The judging method provided by this application uses the checkerboard grid as the target map to collect pictures, and judges whether the line frequency of the line array camera matches the moving speed of the object by calculating the side length of the target in the captured image. This is not only easy to operate, but also objective. Accurate judgment, and the algorithm complexity is low, it is suitable to realize on PC or FPGA.

Description

technical field [0001] The present application relates to the technical field of line-scan cameras, and in particular to a method and system for judging whether the line frequency of a line-scan camera matches the moving speed of an object. Background technique [0002] A line array camera is a camera using a line array sensor, which collects one line of images each time, and the captured image is in the shape of a "line" with a length of several k. To stitch several lines into one image, the subject (or line) must be required Array camera) moves along the height direction of the image and has high resolution. It is often used in the detection field where the measured field of view is slender and requires a large field of view or extremely high precision. [0003] Due to its characteristics, the line array camera must require relative motion between the line array camera and the object in order to continuously capture images. Usually, the line array camera is fixed and the o...

AI Technical Summary

Problems solved by technology

[0004] However, at present, on the one hand, most applications do not have strict requirements for matching the line frequency of the line scan camera and the moving speed of the object; Does the line frequency of the line scan camera match the speed of the object?

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