Digital Image Security Feature Using Transverse Wave Pixel Packets
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Solution Overview
Problem
Existing methods for personalizing documents using laser marking are vulnerable to counterfeiting, as criminal organizations can replicate these images using additional laser radiation or foreign substances, making it difficult to protect against forgery.
Innovation Solution
An image conversion method that transforms a source image into a target image with transverse wave-like pixel arrangements, which is harder to replicate, combined with a verification process using frequency domain analysis to authenticate the image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If laser marking is used to apply personalization information, then the object surface can be selectively treated to create various shades of gray and grayscale images, but criminal organizations can acquire these systems and use them to produce counterfeit objects by altering existing laser markings
Solution Approach 1:
The patent applies asymmetry by embedding security features with specific asymmetric properties into the personalized information. The security features include patterns, textures, or structures that are deliberately asymmetric and difficult to replicate, making counterfeiting significantly harder while maintaining the personalization capability through laser marking systems.
Solution Approach 2:
The patent implements nesting by integrating security features within the personalized information structure. The security features are embedded as nested elements within the overall personalized document or object, creating multiple layers of protection where the security features are contained within the personalization data structure, making it difficult to separate or replicate them independently.
2Adaptability or versatility
If additional laser radiation or foreign substances are applied to alter existing laser markings, then counterfeit objects can be produced, but this creates a vulnerability in the security system
Solution Approach 1:
The patent applies preliminary anti-action by incorporating security features that preemptively counteract attempts at counterfeiting. The embedded security features include verification mechanisms and protective structures that are designed to detect and prevent unauthorized alterations, such as patterns that change under different lighting conditions or structures that reveal tampering attempts, thereby neutralizing the harmful effect of counterfeiting before it can succeed.
Solution Approach 2:
The patent converts the potential harm of laser radiation and foreign substance application into a benefit by creating security features that are specifically designed to detect and respond to such alterations. The security features include self-verifying structures that can identify unauthorized modifications and provide authentication, thereby transforming the counterfeiting attempt into a verification opportunity that enhances security rather than compromising it.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method significantly enhances the security of personalized documents by making them harder to counterfeit and provides a reliable verification process to detect forgeries.
Implementation Method 1
Laser marking is a well-known method for applying personalization information, particularly when the surface of an object to be personalized is made of a polymer material. Using a laser beam, the object surface can be selectively treated so that a chemical transformation of the polymer material occurs at the points where the laser beam strikes the surface, resulting in a color change.
Data Source
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AI summary
The invention relates to an image conversion method for integrating a security feature in a digital source image to generate a target image secured by the integrated security feature. The image conversion method comprises: carrying out transverse-wave-shaped distortion of the source image to generate an intermediate image; generating a target image, the intermediate image being scanned by rows of pixels in order to define, per row of pixels of the intermediate image, a sequence of successive pixels according to the scanning, and each pixel of the sequence being transformed to a corresponding pixel of the target image in that its position in the target image is defined starting from its position in the intermediate image by compensation of the distortion used in the generation of the intermediate image, so that the arrangement of the respective pixels of each sequence is a transverse-wave-shaped wave packet in the target image; wherein the integrated security feature is defined by the wave packets.