Nail Shape Acquisition Using Cross-Limb Index Comparison
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Solution Overview
Problem
Conventional nail design printing apparatuses fail to accurately determine whether the curved shape of a nail has been properly acquired, leading to potential failures in printing due to noise, surface irregularities, or inappropriate positioning, resulting in suboptimal design printing.
Innovation Solution
A nail shape acquiring device with a control unit that acquires index values representing the degree of curve from images of fingers or toes and determines the reliability of these values by comparing them between hands or feet, allowing for accurate determination and correction of the nail design based on reliable index values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the curved shape of the nail is acquired based on a single image measurement, then the acquisition process is simple and fast, but the measurement precision deteriorates due to noise, surface irregularities, or inappropriate positioning
Solution Approach 1:
The patent compares index values from different fingers (specifically ring fingers of both hands) to determine measurement reliability. By focusing the comparison on corresponding body parts with similar characteristics, the system achieves reliable precision without requiring multiple measurements of the same finger, thus maintaining acquisition speed while improving measurement accuracy through selective local comparison.
Solution Approach 2:
The system uses the index value comparison result as feedback to determine whether the acquired curved shape is reliable. When the difference between corresponding fingers exceeds a threshold, the system identifies the measurement as unreliable and triggers a re-acquisition process, creating a closed-loop feedback mechanism that ensures measurement precision without sacrificing overall productivity.
2Productivity
If the nail design is corrected to conform to an improperly acquired curved shape, then the processing is efficient, but the printing reliability deteriorates leading to printing failures
Solution Approach 1:
The patent performs a preliminary reliability check by comparing index values before the nail design correction process. This preliminary action identifies unreliable measurements in advance, preventing the system from proceeding with correction based on erroneous data. By implementing this preliminary verification step, the system ensures printing reliability while maintaining overall processing efficiency through early error detection.
3Measurement precision
If multiple index values are acquired and compared between hands, then the measurement reliability improves, but the device complexity increases
Solution Approach 1:
The patent applies local quality by comparing only specific corresponding body parts (ring fingers of both hands) rather than all fingers. This selective approach achieves reliable measurement verification without requiring complex multi-point comparison algorithms, thus improving measurement precision while minimizing the increase in control unit complexity through focused local comparison.
Data Source
AI summary
A nail shape acquiring device has a control unit, which acquires a plurality of index values representing a degree of curve of a curved shape of a nail of each of a plurality of objects on the basis of at least one image in which the plurality of objects is imaged. The plurality of objects are a plurality of fingers, including at least one pair of same type fingers on right and left hands, or toes, including at least one pair of same type toes on right and left feet. A determination unit determines, on the basis of different index values for nails of the same type fingers or the same type toes, whether at least one of the index values is to be used as a value representing the degree of the curve of the curved shape of the nail.