Two-dimensional code superposition digital watermarking method, identification method and identification system thereof

Abstract

The invention relates to a two-dimensional code superposition digital watermarking method, an identification method and an identification system thereof. The two-dimensional code superposition digital watermarking method comprises the following steps of firstly, acquiring anti-fake information and LOGO image information of a commodity; then adding verification information into the anti-fake information and then carrying out encryption processing; and then generating a two-dimensional code through encrypted anti-fake information; and finally, adding digital watermarking information in the LOGO image information, then taking as a new layer and superposing to the two-dimensional code so as to form a new image, and then taking as a sign and printing on the commodity. The printed commodity can acquire decomposition which is basically consistent with the decomposition of an original image on a visual sense aspect under a standard visible light source. Anti-fake information copy difficulty and an anti-fake coefficient are high so that non-authoritative copy can be prevented. Based on a condition that a commodity printing flow is not changed, commodity printing cost is reduced. Simultaneously, the verification information and the anti-fake information of encryption processing are added so that extraction robustness is increased. Digital watermarking is added in a LOGO image so that safety is high and an anti-fake capability is high too.

Description

technical field [0001] The invention belongs to the technical field of superimposing two-dimensional code information, and in particular relates to a method for superimposing a digital watermark on a two-dimensional code and its identification method and identification system. Background technique [0002] The anti-counterfeiting of printed matter, taking banknotes as an example, embodies the highest level of anti-counterfeiting technology in the country. For example: miniature text, special ink / invisible ink, watermark, hologram, etc. For example, watermarking, the technology of changing the thickness of the paper when filtering paper to embed the pattern, through the light from the back, you can confirm the appearance of the embedded watermark. Special inks can be used to observe different colors from different angles, or the appearance can only be seen from one angle, use special luminous ink, or make the appearance glow after being irradiated with ultraviolet rays. Hol...

AI Technical Summary

Problems solved by technology

[0004] However, the traditional anti-counterfeiting methods are ineffective and cannot track and inquire about the flow of products and the place of production of products.

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