Invisible Ink Document Classification Without Content Obscuration
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Solution Overview
Problem
Traditional methods of labeling documents using visible inks can obscure important information, such as handwritten notes, and do not allow for the addition of unique identifier codes without overprinting underlying content.
Innovation Solution
A method and system for applying a classification code using invisible ink that is not visible under natural light, allowing documents to be scanned and digitized without showing the code in the digital format, while associating the code's information with the digital document, using a classification station and scanning station that can operate without human intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If visible ink is used to apply classification codes to documents, then the classification code is readable and identifiable, but the underlying document content is obscured or overprinted
Solution Approach 1:
The patent applies invisible ink that changes visibility based on light wavelength. Under natural light, the ink is invisible and does not obscure document content. Under ultraviolet light, the ink becomes visible and allows classification code reading. This resolves the contradiction by making the code visible only when needed for classification purposes.
Solution Approach 2:
The patent introduces an intermediary light source (ultraviolet light) that mediates between the invisible ink application and the need for code visibility. The ultraviolet light acts as a mediator that reveals the hidden classification code without requiring the code to be visible under normal viewing conditions, thus preventing obstruction of document content.
2Loss of information
If classification codes are added to documents for identification, then unique identifier information is provided, but the original document content is blocked or overprinted
Solution Approach 1:
The invisible ink changes its optical properties based on light wavelength. It remains invisible under natural light conditions, allowing full legibility of underlying document content. When ultraviolet light is applied, the ink becomes visible, enabling classification code reading without permanently altering the document's appearance under normal viewing conditions.
3Productivity
If digital scanning is performed to create digital copies, then document digitization is achieved, but the classification code may be visible in the digital format
Solution Approach 1:
The classification code applied with invisible ink does not appear in standard digital scans taken under natural light conditions. The code only becomes visible when ultraviolet light is used to illuminate the document during scanning, allowing selective revelation of the code without affecting standard digitization processes.
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
Enables the addition of unique identifier codes to documents without obscuring underlying content, allowing for accurate digitization and preservation of original document information, with the code's information being accessible separately from the digital document.
Implementation Method 1
The ink may be an ultraviolet ink that is visible when viewed under ultraviolet light
Data Source
AI summary
Systems and methods are provided for document classification and digitization. One or more physical documents may have a classification code applied thereon. The classification code may be a unique identifier for the document and/or page of the document. The classification code may utilize ink outside the visible spectrum for the purpose of being machine readable. A digital version of the physical document may be created. The digital version may include a visible reproduction of the document without showing the classification code.