Multi-Angle Surface Evaluation via Rotating Illumination
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Solution Overview
Problem
Conventional methods for evaluating the 'glittering appearance' of paints containing glittering materials require multiple illuminations and light receivers, leading to increased costs and apparatus size due to the need for various observation angles.
Innovation Solution
A surface characteristics evaluation method that captures multi-angle condition images by rotating an illumination device and moving a sample with an image-capturing device, allowing for the calculation of surface characteristics based on in-plane chromaticity distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple illuminations and light receivers are used to perform measurement and evaluation with multiple angle conditions, then the number of observation angle conditions increases, but the cost and apparatus size increase
Solution Approach 1:
The patent employs dynamic movement of the sample stage to change observation angles. Instead of using multiple fixed illuminations and light receivers, a single illumination device and image-capturing device are used while the sample stage moves the painted surface to different positions, thereby achieving multiple angle conditions with a simple configuration
Solution Approach 2:
The patent captures images at different sample positions to create multiple angle condition images. By moving the sample stage and capturing images at different positions, the system creates equivalent data to what would be obtained from multiple fixed observation angles, thus achieving the same evaluation capability with simpler hardware
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 evaluation of surface characteristics with a larger number of observation angles using a simple configuration, reducing costs and apparatus size while maintaining accuracy.
Implementation Method 1
acquiring a multi-angle condition image including multi-angle conditions in a continuous manner by performing an image-capturing process to capture how a reflection condition of the painted surface changes when rotating at least one of an illumination device emitting light onto the painted surface
Data Source
AI summary
A surface characteristics evaluation method for evaluating a surface characteristic of a painted surface including a glittering material, including: a multi-angle condition image acquisition step S101 for acquiring a multi-angle condition image including multi-angle conditions in a continuous manner by performing an image-capturing process to capture how a reflection condition of the painted surface changes when rotating an illumination device 2 emitting light onto the painted surface, the image-capturing process being performed by the line scan camera 4 while a sample P having the painted surface is moved in a certain direction; an in-plane chromaticity distribution acquisition step S102 for acquiring an in-plane chromaticity distribution of the painted surface from the multi-angle condition image acquired; and a surface characteristics evaluation step S107 for calculating particle characteristics S as surface characteristics evaluation values of the multi-angle conditions, on the basis of the in-plane chromaticity distribution acquired.