Image Processing Apparatus Dark Reading Mode Compression Efficiency
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Solution Overview
Problem
The compression efficiency of electronic documents generated by dark reading is lowered due to the inability to unify the background color, which is necessary for maintaining the gradation difference between the paper background and correction marks, unlike in traditional background removal processing.
Innovation Solution
An image processing apparatus with a reading unit that can switch between ordinary and dark reading modes, a background color determining unit, and a conversion image generating unit to convert colors close to the background color into the background color, especially in the dark reading mode, improving compression efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If background removal processing is performed to unify the background color to white, then compression efficiency is improved, but the gradation difference between the paper background and correction marks is lost
Solution Approach 1:
The patent applies different processing strategies to different regions of the image. Background removal processing is applied only to regions identified as paper background, while correction mark regions are preserved with their original gradation information. This localized application of processing allows compression efficiency improvement in background areas without losing information in correction mark areas.
Solution Approach 2:
The patent segments the image into different regions (paper background regions and correction mark regions) and applies different processing to each segment. By dividing the image processing into region-specific operations, the system can unify background colors for compression while maintaining the integrity of correction marks.
2Loss of information
If dark reading mode is used to maintain the gradation difference between paper background and correction marks, then information preservation is improved, but compression efficiency is lowered
Solution Approach 1:
The patent applies dark reading mode selectively only to regions containing correction marks, while applying background removal processing to paper background regions. This localized application allows the system to maintain gradation difference where needed while achieving color unification and improved compression efficiency in background areas.
Solution Approach 2:
The patent segments the image processing based on content identification, applying different reading modes to different segments. By identifying correction mark regions and applying dark reading mode only to those segments while using background removal for paper regions, the system resolves the contradiction between information preservation and compression efficiency.
3Stability of the object's composition
If background removal processing is performed on the entire image, then color unification is improved, but correction marks are converted to white and become invisible
Solution Approach 1:
The patent applies background removal processing only to paper background regions identified through image analysis, while preserving correction mark regions with their original color composition. This localized processing achieves color unification in background areas without converting correction marks to white, maintaining their visibility and reliability.
Solution Approach 2:
The patent segments the image into paper background regions and correction mark regions, applying different processing to each segment. By identifying and separating correction mark regions from paper background regions, the system can unify colors in background areas while preserving the distinct color composition of correction marks.
Data Source
AI summary
A mechanism capable of improving the compression efficiency of image data generated by performing the dark reading is provided. An image processing apparatus comprising a reading unit configured to read a document and generate image data, a reading mode setting unit configured to set a reading mode of the reading unit to a first reading mode or a second reading mode, in which the document is read with the amount of light less than that in the first scanning mode, a background color determining unit configured to determine a background color in the image data generated by the reading unit, and a conversion image generating unit configured to generate image data, in which a color close to the background color in the image data is converted into the background color, in a case that the second reading mode is set.