A system and method for counting fine targets on outer surface of cylinder

Abstract

The invention provides a system and method for counting fine targets on the outer surface of a cylinder, and the method comprises the steps: setting a working platform with four stations, and startingmeasurement after the cylinder reaches a first station; on the first station, starting a laser source and a camera, controlling a stepping motor through images, and adjusting the posture of a deviceto meet the measurement requirement; on the second station and the third station, rotating the cylinder and acquiring and storing a circle of laser and an image of bright spots generated by a small object on the surface of the cylinder; performing self-adaptive ROI (region of interest) acquisition through bright spots to obtain to-be-detected regions on the upper surface and the side surface of the cylinder; and on the fourth station, completing detection and counting through machine vision extraction and feature recognition.

Description

technical field [0001] The invention belongs to the fields of industrial measurement, image processing and automatic control, in particular to a system and method for counting fine objects on the outer surface of a cylinder. Background technique [0002] Visual inspection is an important way in industrial inspection. However, in the existing measurement system, the detection is generally completed by irradiating the target to be measured with various diffuse ambient light. This method of irradiating the target to be tested with ambient light to produce high contrast to highlight the target to be tested will cause some subtle features of the target to be tested to be submerged by strong light, resulting in problems such as insufficient contrast. If the traditional algorithm is still used for detection without improvement, subtle target features will be submerged and lost, and the detection will be inaccurate. And it is cumbersome to manually count the fine targets through i...

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: The technical problem to be solved by the present invention is to provide a laser light source for the poor accuracy of the detection of fine target features and the low efficiency of manual counting for the diffuse ambient light in the existing visual inspection. The system and method for irradiating the target to be measured and automatically counting the number of subtle targets focuses on solving the problems of how to reasonably illuminate the target to increase the contrast between the subtle target and the cylinder, accurately locate and count the subtle targets, etc.

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