Dynamic Gamma Correction for Paper Type Identification
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Solution Overview
Problem
The existing image forming apparatuses face printing failures due to the inability to identify the type of paper being printed, leading to improper gamma correction and subsequent issues such as toner not being properly fixed, causing quality problems and potential paper jams.
Innovation Solution
An image forming apparatus is designed with an identification unit to determine the paper type and a gamma correction unit to apply appropriate gamma correction based on the identified paper type, including a saving unit to save the corrected image and a unit to stop printing if the paper type cannot be identified, thus preventing potential failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If gamma correction uses a fixed gamma value, then the processing is simple and fast, but the toner does not properly fix to different paper types and comes off easily
Solution Approach 1:
The gamma value is changed from a fixed static value to a dynamic value that varies according to the detected paper type. The system automatically adjusts the gamma correction parameter based on paper characteristics such as brightness and texture, enabling optimal toner fixation for each paper type while maintaining automated processing.
Solution Approach 2:
The gamma correction parameter is modified based on paper type detection results. The system changes the gamma value parameter dynamically according to the detected paper characteristics, ensuring proper image processing and toner fixation for different paper types without requiring manual intervention.
2Reliability
If gamma correction uses paper-type-specific parameters, then the toner fixation is improved, but the system cannot handle unidentified paper types leading to printing failures
Solution Approach 1:
The system performs self-diagnosis by detecting paper type automatically and self-adjusts the gamma correction parameter accordingly. When paper type is unidentified, the system self-protects by stopping the printing process, preventing potential printing failures and maintaining system reliability.
Solution Approach 2:
The system incorporates feedback from paper type detection to adjust gamma correction parameters. The detection result feeds back into the image processing unit, which then applies the appropriate gamma value. This closed-loop feedback mechanism ensures optimal processing for identified paper types and proper error handling for unidentified ones.
3Reliability
If the system stops printing when paper type is unidentified, then printing failures are prevented, but the productivity decreases due to job interruptions
Solution Approach 1:
The system performs paper type detection before the actual printing process begins. By identifying potential issues in advance and stopping only when necessary, the system prevents printing failures before they occur while minimizing interruptions to productive printing operations.
Data Source
AI summary
An image forming apparatus includes: an obtaining unit configured to obtain an image; an identification unit configured to identify a type of paper on which the image obtained by the obtaining unit is printed; a gamma correction unit configured to subject the image obtained by the obtaining unit to gamma correction based on the type of the paper identified by the identification unit; a saving unit configured to save the image after being subjected to the gamma correction; and a unit configured to stop printing of the image based on a failure of the identification unit to identify the type of the paper on which the image is printed.