Image Processing Apparatus Abnormal Line Correction
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Solution Overview
Problem
Image processing apparatuses face challenges in correcting abnormal images caused by transfer errors during data transfer, which often result in degraded image quality due to noise and phase locked loop (PLL) unlocking issues.
Innovation Solution
The apparatus includes a processing circuit that corrects image data in abnormal sections of an image based on identification information for abnormal line images and information indicating the position of the abnormal section, using nearby line images to minimize the correction area and maintain image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If image data is corrected using line image data stored before and after error occurrence, then abnormal images can be corrected, but image quality is degraded due to noise and PLL unlocking issues
Solution Approach 1:
The system stores line image data in advance in a line buffer before error occurrence. When an error is detected, the correction unit can immediately use the pre-stored line image data for correction without waiting for error occurrence, thereby improving correction reliability while avoiding the use of noisy post-error data
Solution Approach 2:
The correction unit extracts only the necessary line image data from the line buffer that is required for correction, rather than using all stored data including noisy portions. This selective extraction ensures that only clean, reliable data is used in the correction process, maintaining image quality
2Reliability
If line image data is stored in a line buffer for correction purposes, then correction capability is improved, but device complexity and buffer capacity requirements increase
Solution Approach 1:
The system stores only the necessary portion of line image data in the line buffer - specifically, data from lines before the current line that may be needed for correction. This partial storage approach provides sufficient correction capability without requiring excessive buffer capacity for entire frames or excessive historical data
Solution Approach 2:
The correction system processes and stores line image data in discrete line segments rather than as a continuous large buffer. Each line in the buffer is independently manageable, allowing the system to implement correction with minimal buffer capacity by only retaining necessary preceding lines
Data Source
AI summary
An image processing apparatus includes a memory and processing circuitry electrically coupled to the memory. The processing circuitry is configured to correct image data in a section of an abnormal image, based on information that indicates a position of the section in an abnormal line image that is included in a received image. The processing circuitry is configured to output the corrected image data.