Plate and strip color difference detection system and detection method based on machine vision

Abstract

The invention discloses a plate and strip color difference detection system and method based on machine vision, and belongs to the field of plate and strip defect detection. The visual detection module comprises a linear array camera, an LED linear array light source and an image acquisition card; the plate strip detection module comprises a crank, a top frame and a bracket; the machine table main body comprises an equipment computer control system and a handheld control box; the first linear array camera and the first LED linear light source are fixed on a first top frame on the first support, the two sides of the first LED linear light source are connected with the first top frame through cranks, the second linear array camera and the second LED linear light source are installed on the second support, and the two sides of the second LED linear light source are connected with the second support through middle shafts; the detection method comprises the steps of platform movement, image processing, substitution of RGB into a CIELAB color appearance model to obtain color appearance model parameters, substitution of the color appearance model parameters into a color difference formula to obtain plate strip color difference, and color difference evaluation. According to the invention, reliable, automatic and accurate detection of the chromatic aberration of the aluminum plate strip can be realized, and production continuity and high efficiency are ensured.

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