Image Processing Apparatus for Color-Changing Toner Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image processing technologies fail to effectively prevent information leakage from documents printed with color-changing toner, as they either allow duplication with normal toner or are unable to reliably detect the use of color-changing toner.
Innovation Solution
An image processing apparatus equipped with a light source for reading and erasing, a reading section, and a control section that determines the use of color-changing toner by comparing image data before and after exposure to a specific wavelength light, adjusting reading and output operations accordingly to prevent unauthorized duplication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a copying machine uses normal toner to copy a document printed with color-changing toner, then the copying function is maintained, but information security is compromised because the copied document cannot be erased
Solution Approach 1:
The system performs preliminary detection of color-changing toner characteristics before allowing copying operations. By reading the original document with specific wavelength light and analyzing the reflected light properties, the system identifies documents printed with color-changing toner in advance, preventing unauthorized copying before it occurs.
Solution Approach 2:
The system implements feedback control by continuously monitoring the optical properties of documents during the copying process. When color-changing toner is detected, the system provides feedback to the control unit, which then adjusts or prohibits copying operations to maintain information security while preserving copying functionality for ordinary documents.
2Reliability
If an identification mark detection method is used to prevent duplication of color-changing toner documents, then some security is improved, but information leakage can still occur because the identification mark can be covered or erased
Solution Approach 1:
The system replaces mechanical identification methods (such as visible identification marks or holograms) with optical detection based on the intrinsic physical properties of color-changing toner. By utilizing the unique light absorption and reflection characteristics of color-changing toner at specific wavelengths, the system creates a security mechanism that cannot be easily replicated or removed, as it depends on the chemical properties of the toner itself rather than external markings.
Solution Approach 2:
The system exploits the color-changing property of the toner as a security feature. By irradiating the document with near-infrared light and detecting the characteristic color change response, the system verifies the presence of color-changing toner. This method uses the inherent optical properties of the toner material, making it impossible to replicate without the actual color-changing toner, thus preventing information leakage more effectively than external identification marks.
3Measurement precision
If the reading section reads the entire document area to detect color-changing toner, then detection accuracy is improved, but reading time increases
Solution Approach 1:
The reading section divides the document into multiple scanning regions and performs sequential reading operations. The control unit strategically selects which regions to scan based on the document type and security requirements, allowing comprehensive detection of color-changing toner while minimizing unnecessary scanning of entire documents, thus balancing detection accuracy with reading time efficiency.
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 apparatus effectively prevents information leakage by accurately identifying and managing documents printed with color-changing toner, ensuring secure handling and output operations.
Implementation Method 1
a color-changing printing agent having the characteristic that the agent usually exhibits a specific color and is changed to become colorless or transparent after being irradiated with the light of a specific wavelength
Implementation Method 2
a reading section configured to receive a reflected light from the original document onto which the illuminating light has been applied by the light source for reading
Data Source
AI summary
An image processing apparatus including, a light source for reading for applying light onto an original to read, a light source for erasing for applying light of specific wavelength onto the original to decolorize image area, having been printed with color-changing agent having characteristic to become colorless by the light, a reading section for receiving reflected light from the original, an output section for outputting image data of the original, and a control section configured to compare first image data obtained by applying light from the light source for reading to the original, and second image data obtained by applying light from the light source for reading again to the original after applying light from the light source for erasing to the original, to determine whether the agent has been used in the image, and control at least either the reading operation or the output operation based on that determination.