Number plate reflective film two-dimensional barcode reading equipment and reading method

Abstract

The invention provides two-dimensional barcode reading equipment of a reflecting film of a license plate, comprising a shell, a top cover and a bottom cover and also comprising a communication interface, a control circuit unit, a camera, an infrared light source, a ring-shaped mirror surface and a semitransparent conical photomask, wherein the control circuit unit, the camera, the infrared light source, the ring-shaped mirror surface and the semitransparent conical photomask are arranged in the shell; the bottom cover is provided with a round window; the semitransparent conical photomask is arranged at one side, close to the bottom cover, in the shell, an unfolded opening of the semitransparent conical photomask faces to the round window of the bottom cover, and the diameter of the unfolded opening is same as that of the round window of the bottom cover; the edge of the unfolded opening of the semitransparent conical photomask is fixed on the inner wall of the shell; the ring-shaped mirror surface is arranged around the semitransparent conical photomask and is fixed on the inner wall of the shell; the infrared light source is arranged above the ring-shaped mirror surface and the semitransparent conical photomask; and the camera is arranged above the infrared light source, and a lens penetrates through an opening in the middle of the infrared light source and aligns to a shrinking opening of the semitransparent conical photomask. The two-dimensional barcode reading equipment provided by the invention is used for reading a two-dimensional barcode on the reflecting film of the license plate of a vehicle.

Description

Technical field [0001] The invention relates to a barcode recognition device, in particular to a two-dimensional barcode recognition device for a reflective film of a motor vehicle number plate. Background technique [0002] At present, the common two-dimensional barcode reading equipment generally consists of a light source, an optical lens, an image sensor, an image processing unit and a housing. The basic principle is that the light source illuminates the scanning surface, the reflected light passes through the optical lens, and then the image sensor is imaged. The image sensor collects the scanned image, and then the image processing unit locates, recognizes and decodes the two-dimensional barcode on the image. [0003] Through research, it is known that universal two-dimensional barcode reading equipment is mainly used to scan black and white two-color two-dimensional barcodes above paper materials. The two-dimensional barcodes with colored backgrounds such as number plates h...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome and supplement the deficiencies in the prior art, provide a two-dimensional barcode reading device for number plate reflective film and a reading method using this device, and solve the background color interference and Reflective light spots make it difficult to read the barcode, so as to realize the rapid positioning and efficient reading of the two-dimensional barcode on the reflective film of the license plate of small cars and large cars

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