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A Watermark Image Hiding Method and Watermark Detection Method Based on Grid Raster

A technology for watermarking images and watermark detection, applied in image data processing, image data processing, instruments, etc.

Active Publication Date: 2020-07-07
南京新智客信息科技有限公司
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  • Description
  • Claims
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Problems solved by technology

But the traditional lenticular film, such as figure 1 As shown, only in one direction to change the passability of light, the application of watermark has limitations

Method used

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  • A Watermark Image Hiding Method and Watermark Detection Method Based on Grid Raster
  • A Watermark Image Hiding Method and Watermark Detection Method Based on Grid Raster
  • A Watermark Image Hiding Method and Watermark Detection Method Based on Grid Raster

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Embodiment Construction

[0024] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] The present invention designs a watermark image hiding method based on a grid grating, which is used to realize the hiding of the watermark image of the length and width of M1*M2 and the packaging image of the length and width of (M1*N1)*(M2*N2), N1 , N2 are all integers greater than or equal to 2, in the actual application of the watermark image hiding method, specifically include the following steps:

[0026] Step A. Carry out rectangular grid division according to the direction of the length and width of the watermark image according to the unit block of p*p size, obtain (M1 / p)*(M2 / p) unit watermark blocks, and then enter step B; actually In the application, the value of p is from 1 pixel to 10 pixels, and the value of p is related to the resolution of the image. Generally, the smaller the block, that is, the s...

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Abstract

The invention relates to a watermark image hiding method based on a grid grating. Reference on principle of grating sheet, the mesh grating strategy which changes the transparency of the light in bothdirections makes the watermark image more concealed. In addition to hiding the binary watermark, the gray watermark can be hided, even a color watermark, and multiple watermark images can be hided ina single package image., and the anti-counterfeiting function and the special display effect are realized on the premise of not changing the package appearance and the printing process; Meanwhile, the invention also relates to a watermark detection method, an image capture device is used for detection, and a hidden watermark image can be quickly extracted based on known grid position informationarranged according to a specific rule of the image capture device.

Description

technical field [0001] The invention relates to a grid grating-based watermark image hiding method and a watermark detection method, belonging to the technical field of watermarking. Background technique [0002] The traditional watermark hiding method uses the characteristics of the grating to hide the watermark image in the packaging image; during detection, by selecting a grating sheet with a specific line width and adjusting the horizontal angle of the grating sheet, the hidden watermark image can be quickly revealed. But the traditional lenticular film, such as figure 1 As shown, only the passability of light is changed in one direction, and the application of watermark is limited. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a watermark image hiding method based on grid grating, which can conceally add watermark images in the commodity packaging area, and has anti-counterfeiting functions without changi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00
Inventor 周宇欢付强
Owner 南京新智客信息科技有限公司
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