Image Forming Apparatus Test Chart Data Reduction
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Solution Overview
Problem
Current image diagnostic systems face challenges in reducing image data size for transmission without compromising diagnostic accuracy, often requiring high-resolution and high-tone images, which leads to image quality deterioration due to compression and increased data volume.
Innovation Solution
An image forming apparatus and diagnostic method that print and scan predetermined test charts, adjusting image data size based on defects, allowing for efficient transmission of reduced image data while maintaining diagnostic accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-resolution and high-tone images are transmitted for image diagnostics, then diagnostic accuracy is improved, but image quality deteriorates due to compression and data volume increases
Solution Approach 1:
The patent applies local quality by transmitting only the necessary portions of the test chart (defect regions) rather than the entire chart. The image processing unit extracts and transmits only the regions containing defects or abnormalities, allowing the receiving device to analyze only the relevant areas. This reduces the amount of data transmitted while maintaining diagnostic accuracy for the specific issues being investigated.
Solution Approach 2:
The patent extracts only the essential information from the test chart by identifying and isolating defect regions. The image processing unit detects abnormalities in the test chart and extracts only those specific regions for transmission, rather than transmitting the complete image. This extraction approach reduces data volume while preserving the critical diagnostic information needed to identify image quality problems.
2Quantity of substance
If image compression is performed to reduce data size, then data volume is reduced, but image quality deteriorates
Solution Approach 1:
Instead of compressing the entire image, the patent extracts only the necessary defect regions and transmits only those extracted portions. This approach reduces data volume by eliminating redundant information (perfect regions) while maintaining image quality in the critical areas that need diagnostic attention. The extraction method avoids the quality loss associated with compressing the complete image.
3Quantity of substance
If the number of images is reduced for transmission, then data volume is reduced, but diagnostic accuracy may be compromised
Solution Approach 1:
The patent applies local quality by focusing transmission on specific defect regions rather than transmitting multiple complete images. The image processing unit identifies and extracts only the regions containing abnormalities, allowing the receiving device to analyze these localized areas in detail. This approach reduces the number of images transmitted while maintaining diagnostic accuracy by concentrating on the most relevant information.
Data Source
AI summary
An image forming apparatus is configured to print a predetermined test chart that corresponds to an image defect to be analyzed, and to transmit the printed test chart to an image diagnostic apparatus as scanned image data. The image forming apparatus includes: an image forming unit that prints the test chart; a scanning unit that scans the test chart printed by the image forming unit and acquiring the image data; and a transmission unit that transmits the image data of the test chart scanned by the scanning unit, after changing the size of the image data corresponding to the defect.