Outline Processing Apparatus Dynamic Normalization Coefficient
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Solution Overview
Problem
Existing image processing techniques face challenges in balancing image quality and file size during outline processing of scanned documents, particularly when compressing full-color documents, as high compression rates can make characters illegible and result in unnecessarily large file sizes.
Innovation Solution
An image processing apparatus and method that detects coordinate values for object outlines, calculates relative coordinate values, and normalizes them using a dynamically determined coefficient to reduce the number of digits, allowing for efficient compression while maintaining image quality, by separating text and background areas and using different compression techniques for each.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If high compression is applied to scanned data, then file size is reduced, but characters become illegible
Solution Approach 1:
The patent segments the image processing into two distinct paths: one for text areas (converted to outline data with high precision) and one for non-text areas (compressed with higher aggregation). This segmentation allows each area to be processed according to its specific requirements, maintaining character legibility while reducing overall file size.
Solution Approach 2:
The patent applies different processing qualities to different parts of the document. Text areas receive high-precision outline processing to maintain legibility, while non-text areas undergo standard compression. This local differentiation of processing quality resolves the contradiction between file size reduction and character legibility.
2Manufacturing precision
If precision of coordinate values is increased, then image quality is improved, but file size becomes unnecessarily large
Solution Approach 1:
The patent dynamically determines the number of digits for coordinate values based on the actual variation in the scanned data. Instead of using a fixed high precision for all characters, the system adapts the precision level to the specific document characteristics, reducing unnecessary digits for documents with larger characters while maintaining sufficient precision for small characters.
Solution Approach 2:
The patent changes the parameter of coordinate value precision dynamically. By calculating the variation amount in coordinate values and adjusting the number of digits accordingly, the system optimizes the balance between image quality and file size for different document types.
3Device complexity
If uniform compression is applied to entire scanned data, then processing is simplified, but both small and large characters cannot maintain appropriate quality
Solution Approach 1:
The patent divides the scanned data into text areas and non-text areas, applying different processing methods to each segment. This segmentation enables the system to maintain character quality while simplifying the overall processing architecture through automated area detection and classification.
Data Source
AI summary
In outline processing according to the present embodiment, a normalization coefficient is determined such that values outputted as outline data substantially coincide with a maximum value in a prescribed number of digits in accordance with a variation amount between coordinate values. Such determination can constantly enhance image quality (legibility of a character) of the outline data up to a highest value under conditions of the prescribed number of digits as well as being free of the influence of a size of a target character. In other words, it is possible to provide the highest feasible image quality under the limitation of the number of digits set from the limit of a file size.