Character Inspection Area Rotation for Variable Print Recognition
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Solution Overview
Problem
In data inspection for variable printing, accurately recognizing characters is hindered when the orientation set during glyph registration differs from the orientation during actual inspection, leading to inaccurate character recognition.
Innovation Solution
An inspection apparatus with selection and setting units for character areas, rotation units to align inspection areas with the correct orientation, and recognition units for character recognition, ensuring accurate alignment and recognition during both registration and inspection processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the direction (angle) of the character in glyph registration is set differently from the direction (angle) of the character at inspection time, then the inspection process becomes more flexible, but character recognition accuracy deteriorates
Solution Approach 1:
The system performs preliminary orientation alignment by rotating the inspection area to match the glyph registration orientation before character recognition is performed. This preliminary action ensures that the character orientation is consistent between registration and inspection phases, thereby maintaining recognition accuracy while allowing flexible inspection setup.
Solution Approach 2:
The inspection area is made dynamically rotatable to adapt to different orientation requirements. The system can rotate the inspection area to match various glyph registration orientations, providing flexibility in inspection setup while ensuring accurate character recognition through proper orientation alignment.
2Measurement precision
If character orientation alignment is performed through rotation processing, then character recognition accuracy is improved, but processing time increases
Solution Approach 1:
The orientation alignment is performed as a preliminary step before character recognition, preparing the inspection area in advance with the correct orientation. This preliminary rotation ensures that subsequent character recognition can proceed efficiently without requiring additional orientation adjustments during the recognition process.
3Ease of operation
If manual orientation adjustment is required during preview, then user control over character direction is improved, but ease of operation deteriorates
Solution Approach 1:
The system provides preliminary preview functionality that displays the inspection area with character orientation information before final inspection settings are confirmed. This allows users to verify and adjust character directions in advance, ensuring correct orientation alignment without adding complexity to the main inspection operation.
Data Source
AI summary
An inspection apparatus selects at least one character area, in a first preview image obtained by reading and previewing a print product, sets a direction, for a character in the selected character area, registers the set direction and the character in the selected character area in association with each other, selects at least one character inspection area, in a second preview image obtained by reading and previewing a print product as an inspection target, sets a direction, for a character in the selected character inspection area, rotates the character inspection area to match the set direction, with the direction set for the character in the selected character area, performs character recognition, for the character in the rotated character inspection area, and inspects the character inspection area, based on a result of the character recognition and a result of recognizing the character in the selected character area.