Digital screening method and system based on high-fidelity hidden picture screens

Abstract

The invention provides a digital screening method and system based on high-fidelity hidden picture screens and relates to the technical field of anti-counterfeit printing. The method comprises: separating based on color, generating monochromic high-fidelity screens comprising an underlying picture, wherein picture defects are quantitatively and precisely predicted through a printed picture distortion prediction system and are precisely aligned and compensated through a picture compensation and optimizing system, and screening corresponding monochromic superficial pictures with the high-fidelity screens comprising one underlying picture to obtain high-fidelity printed material with an underlying picture; the system comprises a color separating module, a high-fidelity hidden picture screen generating module, a screening module and a platemaking printing module. The digital screening method and system based on high-fidelity hidden picture screens can hide multiple layers of high-definition multi-gray underlying pictures at the premise of ensuring high fidelity of the superficial picture, can effectively improve the quality of superficial and underlying pictures, are suitable for various mesh modulation modes and their combination, and are particularly suitable for the case with constant underlying pictures and a significantly changed or replaced superficial picture.

Description

Technical field: [0001] The invention relates to the technical field of anti-counterfeiting printing, in particular to a method and system for digital hanging of digital nets based on high-fidelity picture collection screens. Background technique: [0002] The technique of hiding other images or information within printed diagrams has a long history. With the digital development of printing, more and more technical methods for hiding images or information have been developed and applied, the most widely used in the field of anti-counterfeiting. [0003] The actual displayed image that the observer can see is called the surface image; the image that is hidden under the surface image through a specific technology, cannot be distinguished by the naked eye, and can only be seen through corresponding detection means is called the base image; the base image The process hidden under the table map is called the hidden map. [0004] Most conventional printing systems do not have th...

AI Technical Summary

Problems solved by technology

The second type of defect cannot be directly judged in the halftone image. It is caused by the interaction between the distortion of the printing system and the disturbance of the dot structure. Different printing systems have different results.

This network reconstruction method is very inconvenient for some application scenarios where the base map remains unchanged and the table map changes or replaces a large number of

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