Surface Inspection Lighting Selection for Gloss Reflection Control
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Solution Overview
Problem
Existing image processing technologies for inspecting object surfaces face accuracy degradation due to gloss characteristics causing light source reflections, which affect the derivation of shape information and reflectance.
Innovation Solution
An image processing apparatus adjusts the lighting pattern by selecting light sources based on the gloss reflection intensity of the object, using light sources with different zenith angles to minimize the impact of surface reflections, thereby improving inspection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple light sources are used for photometric stereo inspection, then inspection coverage and detail are improved, but gloss reflections from the object surface degrade measurement precision
Solution Approach 1:
The patent changes the parameter of light source selection based on the object's gloss characteristics. By detecting gloss reflection intensity and selecting appropriate light sources from a plurality of available light sources, the system adapts lighting conditions to minimize harmful reflections while maintaining inspection accuracy.
Solution Approach 2:
The system incorporates feedback by detecting the gloss reflection intensity of the object surface and using this information to determine which light sources to activate. This closed-loop approach allows the inspection system to adjust lighting based on real-time observations of the object's surface properties.
2Measurement precision
If light sources are selected based on gloss reflection intensity, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent applies multi-functionality by using a single detection mechanism to identify gloss characteristics and a unified selection criterion to choose from multiple light sources. This approach consolidates complexity into a manageable framework where one detection process serves multiple purposes: characterizing the surface and determining optimal lighting.
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
The solution enhances the accuracy of deriving shape information and reflectance by adapting the lighting pattern to the object's gloss characteristics, reducing the influence of surface reflections and improving overall inspection quality.
Implementation Method 1
When an object surface inspection is performed based on captured images, some gloss characteristics of an object surface may cause a reflection of a light source on an inspection surface
Data Source
AI summary
An image processing apparatus comprises at least one processor and at least one memory. The at least one memory stores instructions for causing the at least one processor and the at least one memory to set a light source to be turned on from among a plurality of light sources disposed at positions different from each other, based on a gloss reflection intensity of an object to be inspected, and perform inspection processing on the object, based on a plurality of images of the object. In the plurality of images of the object, the object is irradiated with light from the set light source.