Image acquisition device and image acquisition method

Abstract

The invention relates to the field of image acquisition, and in particular relates to an image acquisition method and an image acquisition method. The image acquisition device comprises a line scan camera, an industrial control computer, a line light source, a dotting device and an area-array camera. The line light source and a measured piece are separately arranged to be opposite to the line scancamera; the line scan camera is connected with the industrial control computer; and the line scan camera is used for acquiring a gray image to be detected of the measured piece. The dotting device moves relative to the measured piece and forms a marking dot on the measured piece; the area-array camera is connected with the industrial control computer; and the area-array camera is used for acquiring the position information of the marking dot, and inputting the position information of the marking dot into the industrial control computer. The industrial control machine adjusts the scanning frequency of the area-array camera via the position information of the marking dot. Via the combination of the area-array gray image and the line scan camera, the industrial control computer adjusts the scanning frequency of the line scan camera via the position information of the marking dot, and the gray image to be detected under the non-uniform plate speed is acquired; the imaging effect is excellent, the detection precision is high, and the subsequence analysis and detection are facilitated.

Description

technical field [0001] The present invention relates to the field of image acquisition, in particular to an image acquisition device and an image acquisition method. Background technique [0002] Based on the relatively long plate motion, when a homogeneous plate is on the conveyor belt, the obvious surface features can be collected, and the transmission speed is uncertain. Usually, it is deduced from the speed and stroke of the conveyor belt when there is no displacement between the plate and the conveyor belt. The speed of movement of the sheet. However, due to the long-term use of the conveyor belt, the surface roughness will be worn away, resulting in displacement of the plate and the conveyor belt during movement, which will affect the measurement of the plate speed. [0003] When a homogeneous plate is on the conveyor belt, the obvious surface features can be collected, and the transmission speed is uncertain. The contact detection method will also be selected to carr...

AI Technical Summary

Problems solved by technology

However, due to the long-term use of the conveyor belt, the surface roughness will be worn away, resulting in displacement of the plate and the conveyor belt during movement, which will affect the measurement of the plate speed

[0003] When a homogeneous plate is on the conveyor belt, the obvious surface features can be collected, and the transmission speed is uncertain. The contact detection method will also be selected to carry out corresponding size detection and defect detection on the plate, which will cause certain wear and tear on the plate, and affect the Subsequent use of the board

[0004] In another case, the sensor will be used to measure the speed of the plate, combined with software to detect the plate to a certain extent, this method is cumbersome and complicated to analyze, and has high requirements for the sensor

[0005] When the linear array camera is used to collect the uneven speed of the plate, if the acquisition frequency of the linear array camera is fixed, it will cause image confusion.

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