Printing System Rasterized Image Comparison for Pre-Print Validation
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Solution Overview
Problem
Existing printing systems fail to detect invalid rasterized images before printing, particularly those affected by dynamic factors such as cache issues, requiring post-print inspection to identify errors.
Innovation Solution
A printing system that generates multiple rasterized images through different processing units and compares them in pixel units to detect invalid images before printing, using software like Adobe PDF Print Engine (APPE) and Configurable PostScript Interpreter (CPSI) for rasterization, and includes an inspection unit to verify image integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single rasterized image is generated and printed without verification, then printing speed is maintained, but invalid images may be printed resulting in poor quality output
Solution Approach 1:
The system performs preliminary verification by generating multiple rasterized images through different processing units before printing, and compares them to detect invalid images. This advance checking prevents poor quality output without requiring post-print inspection, thus maintaining printing speed while improving print quality.
Solution Approach 2:
The system creates multiple copies (rasterized images) of the same image data through different processing units. By comparing these copies, the system can identify invalid images without additional physical printing, thereby ensuring print quality while avoiding waste of printing resources.
2Reliability
If multiple rasterized images are generated and compared to detect invalid images, then print quality is improved, but processing time and system complexity increase
Solution Approach 1:
The system introduces an image comparison unit as an intermediary that automatically compares rasterized images generated by different processing units. This intermediary component handles the complexity of multi-unit coordination and validity detection, ensuring reliable image validation while managing system complexity through modular design.
Solution Approach 2:
The system implements a feedback mechanism where the comparison results of multiple rasterized images are used to determine whether to proceed with printing. This feedback loop ensures that only valid images are printed, improving reliability while keeping the system manageable through automated decision-making based on comparison outcomes.
3Loss of time
If invalid rasterized images are not detected before printing, then processing is simpler and faster, but post-print inspection is required resulting in wasted time and materials
Solution Approach 1:
The system replaces manual post-print inspection with an automated digital comparison mechanism. By using software-based image comparison to detect invalid rasterized images before printing, the system eliminates the need for time-consuming post-print inspection and material waste, while the automated nature of the comparison makes detection straightforward despite the technical complexity.
Data Source
AI summary
An information processing apparatus includes a processor configured to perform a first process of generating a rasterized image by rasterizing received image data, perform a second process of generating rasterized images by rasterizing the received image data plural times by a processing unit that performs the first process, and contrast the rasterized image obtained by the first process with the plural rasterized images obtained by the second process performed plural times, and check whether the rasterized image obtained by the first process is invalid.