Transparent Member Shape Recognition Using Total Reflection Lighting
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Solution Overview
Problem
Existing image recognition technologies struggle to accurately recognize the outer shape of objects with transparent members due to glare from illumination, especially when both high and low gloss regions are present, making it difficult to deploy a system that can handle a wide variety of products.
Innovation Solution
An image recognition method and device that adjusts illumination light intensity based on color information to suppress glare, using total reflection principles to recognize transparent members by varying the illumination angle and intensity according to the object's color characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If illumination light intensity is increased to improve imaging sensitivity, then the camera can detect objects more reliably, but glare occurs on transparent member surfaces causing measurement accuracy to decrease
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting illumination light intensity based on the color information of the transparent member. The system selects optimal illumination parameters (intensity and angle) that prevent total reflection and glare while maintaining sufficient lighting for accurate imaging and measurement
Solution Approach 2:
The system uses feedback by analyzing color information of the transparent member and using this data to adjust illumination conditions. The color information serves as feedback that guides the selection of appropriate illumination intensity to avoid glare while ensuring reliable detection
2Measurement precision
If selective illumination methods are used to avoid glare on high gloss portions, then surface inspection can be performed, but the system complexity increases due to multiple illuminator types
Solution Approach 1:
The patent applies universality by using a single illumination device that can perform multiple functions through dynamic parameter adjustment. Instead of requiring separate diffused light illuminators for high gloss portions and parallel light illuminators for low gloss portions, one device adapts its illumination characteristics based on the object's color information, simplifying the overall system structure
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate recognition of objects with transparent members by suppressing glare, allowing for consistent recognition across different gloss levels and shapes, suitable for diverse product applications.
Implementation Method 1
the illumination light having one illumination light intensity based on color information of the transparent member, among the plurality of illumination light intensities and being within an illumination angle at which the illumination light is configured to be totally reflected in the transparent member
Data Source
AI summary
Provided is an image recognition method for recognizing and measuring an outer shape of transparent member (11) in object (2) having transparent member (11) disposed on a surface, and the method includes irradiating object (2) with illumination light (15) from illumination device (5) configured to perform irradiation of illumination light (15) with a plurality of illumination light intensities, the illumination light intensity having one illumination light intensity based on color information of transparent member (11), among the plurality of illumination light intensities and being within illumination angle θ at which the illumination light is configured to be totally reflected in transparent member (11), imaging object (2) irradiated with illumination light (15), and recognizing the outer shape of transparent member (11) based on imaged information.