Object Matching Device Using Partial Image Extraction
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Solution Overview
Problem
Existing object matching technologies face challenges in achieving high accuracy for authenticity determination, particularly in environments without specialized lighting, due to difficulties in capturing clear random patterns from object surfaces, leading to decreased matching accuracy.
Innovation Solution
An object matching device and method that acquire and compare partial images including characters printed on objects, along with posture data, to determine identity, using a camera and image processing techniques to extract and correct images, eliminating the need for specialized lighting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a ring lighting unit is used to acquire random patterns from the peripheral portion, then the clarity of the random pattern image is improved, but the device complexity and cost increase due to requiring specialized lighting equipment
Solution Approach 1:
The patent replaces expensive, specialized ring lighting equipment with a standard smartphone camera that uses its built-in flash or ambient light. This substitutes a complex, dedicated lighting system with a common, readily available device, reducing cost and complexity while maintaining sufficient image quality for authentication purposes
Solution Approach 2:
The patent enables universal authentication using standard smartphone cameras that most people already possess, rather than requiring specialized lighting equipment. The same camera can be used for both capturing authentication patterns and general photography, eliminating the need for dedicated authentication hardware
2Measurement precision
If the camera position is made accurate to capture clear random patterns, then the matching accuracy is improved, but the ease of operation decreases as it becomes difficult for ordinary users to achieve proper positioning
Solution Approach 1:
The system automatically performs camera positioning and image capture without requiring user intervention. The smartphone's camera is guided by the application to capture the authentication pattern, and the system automatically processes the image, eliminating the need for users to manually position the camera or adjust settings
Solution Approach 2:
The patent introduces an intermediary processing system that captures the image through the smartphone camera and then performs automatic positioning correction and pattern extraction. This intermediary layer handles the complex positioning requirements, shielding the user from the difficulty of precise camera alignment
3Reliability
If random patterns from the peripheral portion are used for authentication, then the reliability is improved, but the measurement precision decreases because these patterns are hard to see and difficult to capture clearly without specialized equipment
Solution Approach 1:
The patent enhances the visibility of authentication patterns by applying color enhancement and contrast adjustment to the captured image. The system processes the image to make the random patterns more distinct and visible, allowing clear capture using standard smartphone cameras without specialized lighting
Data Source
AI summary
An object matching device includes an acquiring unit, an extracting unit, and a determining unit. The acquiring unit acquires an image of an object to be matched with a character printed thereon. The extracting unit extracts a partial image of predetermined size including the character as a matching partial image from the image. The determining unit compares the matching partial image with a registration partial image acquired from an object to be registered and registered in advance, and thereby determines an identity of the object to be matched and the object to be registered.