Relay Device Composite Copy-Preventing Images Print Data
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Solution Overview
Problem
Existing techniques for preventing copying of printed matter, such as the tint block pattern method, face challenges including high costs, limited compatibility with printers, and inconvenience in changing patterns, and do not effectively address the demand for copy protection in all scenarios.
Innovation Solution
An image forming system comprising a relay device connected to an image transmitting apparatus and an image forming apparatus, which composites predetermined image data onto received image data and transmits the composite image data to the image forming apparatus for printing, allowing for the addition of copy-preventing images without requiring special printers or updates, and enabling flexible and secure printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a printer driver function is added to enable tint block pattern printing, then copy protection capability is improved, but compatibility with existing printers is worsened and introduction cost increases
Solution Approach 1:
The patent introduces an image processing apparatus as an intermediary device between the image transmitter and image former. This apparatus receives image data, adds the tint block pattern, and transmits the composite data to the printer. This mediator approach allows copy protection to be added without modifying existing printers or their drivers, thereby maintaining compatibility while enabling the desired functionality.
Solution Approach 2:
The patent separates the copy protection function from the printer driver by placing it in a standalone image processing apparatus. This segmentation allows the copy protection feature to be added independently without requiring updates to printer drivers or modifications to existing printer systems, thus maintaining broad compatibility.
2Reliability
If special paper with pre-printed tint block pattern is used, then copy protection effect is improved, but printing cost increases
Solution Approach 1:
Instead of requiring special pre-printed paper, the patent uses a digital copying approach where the tint block pattern is generated and composited with the document image data electronically before printing. This allows the use of ordinary paper while achieving the same copy protection effect, significantly reducing material costs.
3Ease of manufacture
If predetermined tint block patterns are used, then implementation simplicity is improved, but flexibility to change patterns is worsened
Solution Approach 1:
The patent implements a dynamic system where multiple types of tint block patterns are stored in the image processing apparatus, and the user can select and switch between different patterns as needed. This dynamic capability allows both simple implementation (with predefined patterns) and flexibility (with the ability to change patterns), resolving the contradiction between ease of implementation and adaptability.
Data Source
AI summary
A folder created in a print data storing region for storing print data received from an external device is checked. When it is judged that there is print data, a print job is created by adding a restraining image corresponding to the folder to the print data. The created print job is transmitted to a multi-function printer, and an image with the added restraining image is formed on paper. It is thus possible to add an image for restraining copying.