A Method for Determining the Line Width of Vector Map Based on Raster Anti-counterfeiting Hidden Image
A technology of line width and determination method, applied in image data processing, image data processing, instruments, etc., can solve problems such as information loss, affecting the display effect of hidden images, and unclear display of hidden information, and achieve the effect of improving quality.
Active Publication Date: 2017-01-18
SHAANXI UNIV OF SCI & TECH
View PDF5 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Among them, the hiding of the image can be realized through the offset of the dots, and this involves the embedding of hidden information. When the line-style vector diagram is introduced, the width of the line has little effect on the hiding effect of the image. But it will affect the display effect of the hidden image, especially when the line width is relatively small, it will cause the final display of hidden information to be unclear or the information will be lost. How to choose the line width of the hidden vector map is very important for improving the quality of printing anti-counterfeiting production significance, so it is necessary to find a method to determine the line width of the vector map in the hidden image
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0050] Now take the information hidden in the black plate and the dot area ratio is 25% as an example to specifically illustrate the production and operation process of the present invention.
[0051] (1) In the Coreldraw software, make a vector diagram with a line width of 0.353mm (one of the default line widths in the system in the Coreldraw software), with a size of 5cm×5cm, and save it in AI format.
[0052] (2) Create a background color block in Photoshop. Among them, the size of the original color block is 5cm×5cm, and the resolution is 2800dpi. Fill the dot area ratio of foreground color C, M, Y, K to 25% respectively. Separate four-color channels, perform "image / mode / bitmap" processing, set the parameters to output resolution 2800dpi, use halftone screen as the method, frequency (screening line number) is 175LPI, shape is circle, C, M, Y The screening angles of the four channels of , K are 15°, 75°, 90°, and 45° respectively. After setting, perform "image / mode / grays...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a determination method based on a raster anti-fake concealed image vector diagram line width. The method includes the steps that a vector diagram with a certain line width is manufactured, a background color lump of the same size with the vector diagram is established, four channels are separated and are screened respectively, and the shape of screen dots is round; the vector diagram is embedded into a certain channel of the background color lump to form a concealed layer; a screen spot mathematic relation of the vector diagram line width and the background color lump is established; a line width is selected to make the embedded vector diagram with the corresponding width according to the mathematic relation, the embedded vector diagram with the corresponding width is embedded into the certain channel of the background color lump to form the concealed layer, and the four channels are combined, and a concealed image containing concealed information is finally formed. A simulation raster layer matched with the background color lump is added into the Photoshop, and concealed information in the concealed image of the background color lump is shown.
Description
technical field [0001] The invention belongs to the technical field of image hiding in printing anti-counterfeiting, and in particular relates to a method for determining the line width of a vector diagram of a grating anti-counterfeiting hidden image. Background technique [0002] The grating anti-counterfeiting method is simple and easy to implement, does not require too much equipment and printing technology, and can achieve the purpose of anti-counterfeiting without increasing production costs. Therefore, the grating anti-counterfeiting method is a promising anti-counterfeiting method. [0003] Grating anti-counterfeiting is an anti-counterfeiting technology based on the combination of halftone screening technology and grating optical characteristics. Among them, the hiding of the image can be realized through the offset of the dots, and this involves the embedding of hidden information. When the line-style vector diagram is introduced, the width of the line has little e...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00
Inventor 刘国栋陈燕郭凌华刑铁豆
Owner SHAANXI UNIV OF SCI & TECH