Measurement method of planeness based on image processing and pattern recognizing

Abstract

The invention discloses a flatness detection method based on image processing and image recognition. Two inline lasers are respectively installed above the north-south direction and east-west direction of the measured object, so that they irradiate the measured plane according to a certain angle. up, forming a cross. A camera is installed in the vertical direction of the plane, and the camera is facing the detection plane. The relative position of the camera and the laser remains constant. The measured object runs at a certain speed, making the light cross slide over the measured plane. A robust illumination curve is obtained through image refinement, light point correlation, and local curve fitting. Then through the analysis of the optical path, the relationship between the flatness and the image illumination curve is obtained, and the plane convex / concave amount is calculated by the distance and direction of the image illumination curve deviating from the reference straight line. Finally, the flatness detection linear array is formed from multiple images, and the flatness in different directions is calculated by curve fitting.

Description

technical field

[0001] The invention relates to the technical field of measurement and control, relates to a plane flatness detection method, in particular to a flatness detection method based on image processing and image recognition. Background technique

[0002] Flatness is a dimensionless index, which characterizes the degree of maximum protrusion or depression within a unit length. Flatness detection of plane involves workpiece processing, product quality inspection, road condition detection and other fields. In almost all occasions involving plane, its flatness is an important parameter, which not only affects its appearance, but also affects its application. For example: floor tiles with excessive flatness are laid on the floor, which not only affects the appearance, but also is easy to trip; steel plates with poor flatness are easy to break; the flatness of the road surface will seriously affect the allowable driving speed of vehicles on the road. Therefore, where a...

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