RIP Text Anomaly Detection Using Position-Based Comparison
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Solution Overview
Problem
Existing digital printing systems face challenges in detecting anomalies such as garbled characters, skipped characters, and missing characters during RIP detection, especially when the extraction order of PDL text data differs from the recognition order of OCR text data.
Innovation Solution
An information processing apparatus and method that acquire text data from both PDL data and raster image data, compare the text data using position information, and inspect for anomalies, even when the extraction and recognition orders differ.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PDL text data is extracted using regular text arrangement from upper left to lower right, then extraction process is simple and fast, but correct comparison cannot be achieved when the original data has irregular text arrangement
Solution Approach 1:
The patent introduces position information (coordinates) as an additional dimension for comparing PDL text data and OCR text data. Instead of relying solely on extraction order, the system matches characters based on their spatial positions in the image, allowing accurate comparison regardless of extraction sequence differences
Solution Approach 2:
The patent changes the comparison parameter from extraction order to position information. By using coordinate data to identify and match characters, the system can accurately compare text even when extracted in different orders, resolving the contradiction between simple extraction and accurate comparison
2Productivity
If OCR recognizes text in regular order from upper left to lower right, then recognition process is simple and fast, but correct comparison cannot be achieved when PDL data has irregular text arrangement
Solution Approach 1:
The patent introduces position information (coordinates) as an additional dimension for comparing PDL text data and OCR text data. Instead of relying solely on extraction order, the system matches characters based on their spatial positions in the image, allowing accurate comparison regardless of extraction sequence differences
Solution Approach 2:
The patent changes the comparison parameter from extraction order to position information. By using coordinate data to identify and match characters, the system can accurately compare text even when extracted in different orders, resolving the contradiction between simple extraction and accurate comparison
3Productivity
If font is replaced on image forming apparatus side when designated font cannot be used, then printing can proceed, but garbled characters may occur
Solution Approach 1:
The patent performs preliminary inspection of RIP-processed text data by comparing it with original PDL text data before printing. This allows detection of garbled characters that occur during font replacement, enabling corrective action before the printing process completes
Solution Approach 2:
The patent implements a feedback mechanism where the inspection results of RIP text data are used to identify and report character anomalies. This feedback loop allows the system to detect when font replacement has caused garbled characters, enabling quality control despite the necessity of font substitution
Data Source
AI summary
Disclosed is an information processing apparatus comprising: one or more memory devices that store a set of instructions; and one or more processors that execute the set of instructions to: acquire, from first data, first text data relating to text included in the first data, the first data being print data; convert the first data into second data, the second data being raster image data; acquire, from the second data, second text data relating to text included in the second data; and compare the first text data and the second text data using text position information, and inspect whether the second data has an anomaly.