Raster anti-counterfeiting image setting method improving anti-counterfeiting information concealment
A concealed, grating technology, applied in image data processing, image data processing, instruments, etc., can solve the problems of anti-counterfeiting failure, lack of pertinence, and insufficient dot overlap, to expand the angle range, improve the extraction effect, and improve the covert effect
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Embodiment 1
[0089] A grating anti-counterfeiting image setting method for improving the concealment of anti-counterfeiting information, comprising the following steps:
[0090] Step 1. Select and decompose the host image
[0091] The host image is randomly selected to hide the anti-counterfeiting information. The host image needs to meet the following conditions:
[0092] (1), a digital file composed of m*n pixels;
[0093] (2), present embodiment 1 is in photoshop software, image mode is set to CMYK mode, decomposes host image, makes it to be made up of totally 4 color channels of C channel, M channel, Y channel and K channel;
[0094]At least one color channel of the host image has a hidden area where anti-counterfeiting information can be set. The hidden area has s*s pixels. The color channel where the hidden area is located is the master, and all the pixels in the hidden area are in the master The color values on the plates are all the same, denoted as α, where α is 0.1 to 0.5; th...
Embodiment 2
[0120] see Figure 4 , 5 And 6, on the basis of embodiment 1, the differences of embodiment 2 are: (1), the host image is different; (2), the anti-counterfeiting information is text; (3), α is 0.1.
Embodiment 3
[0122] see Figure 7 , 8 And 9, on the basis of embodiment 1, the difference of embodiment 3 is: (1), the host image is different; (2), the anti-counterfeiting information is a figure; (3), α is 0.25, preferably after the site e moves The polar coordinates of q' are
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