Compact Image Processing System with Central Camera and Peripheral Illumination
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Solution Overview
Problem
Conventional image processing systems are limited by the large size due to the need to arrange multiple light sources at different angles relative to the camera, restricting their applicability in facilities.
Innovation Solution
An image processing system with a light emitting part positioned between the camera and the object, allowing for compact design by using different illumination patterns for various target positions within the photography visual field, enabling accurate image measurement and versatile application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple light sources are arranged at different angles relative to the camera to achieve multi-angle illumination, then illumination coverage and measurement accuracy are improved, but device size increases
Solution Approach 1:
The patent divides the illumination function into multiple independent light sources positioned at different locations (first light source at first position, second light source at second position). Each light source independently provides illumination from a specific angle, enabling multi-angle illumination without requiring a single complex illumination system. This segmentation allows the system to achieve comprehensive illumination coverage while maintaining a compact overall device structure.
Solution Approach 2:
The patent transitions from a single-point illumination approach to a multi-position illumination approach by adding spatial dimensionality. Instead of moving a single light source or camera, multiple light sources are distributed across different positions in space, creating a three-dimensional illumination arrangement. This dimensional expansion enables angle-dependent illumination effects without increasing the linear footprint of the device.
2Adaptability or versatility
If multiple light sources are arranged at different positions to provide angle-dependent illumination, then illumination versatility is improved, but device complexity increases
Solution Approach 1:
The patent designs the illumination system with universal applicability by using multiple light sources that can serve different functions depending on the inspection requirements. The same multi-source configuration can provide various illumination patterns (front illumination, side illumination, angled illumination) for different types of defects and object geometries. This multi-functional design achieves illumination versatility without requiring multiple specialized illumination systems, thereby controlling device complexity.
3Ease of manufacture
If the camera is positioned directly above the object with light sources in the periphery, then optical alignment is simplified, but the device becomes large in size
Solution Approach 1:
The patent arranges the light sources and camera in a nested configuration where the camera is positioned at the center (directly above the object) and light sources are positioned at peripheral locations that are spatially integrated into the same compact volume. The light sources are effectively 'nested' around the central optical axis, allowing multi-angle illumination to be achieved within a minimal footprint while maintaining simple optical alignment along the central axis.
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 system achieves a compact size and improved measurement accuracy by determining illumination patterns for each target position, reducing the time required for image data acquisition and enhancing versatility across different object types.
Implementation Method 1
The control part causes light of a first illumination pattern to be emitted from the light emitting part to the object
Implementation Method 2
photographing an object with a camera disposed right above the object and inspects the appearance of the object using a plurality of photographed images
Data Source
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AI summary
The disclosure provides an image processing system that avoids at its best restrictions in determining applicable facilities. The image processing system includes a camera for photographing a workpiece, an illumination device having light transmittance and disposed between the camera and the workpiece, and a control device for controlling the camera and the illumination device. The illumination device can change illumination patterns according to instructions from the control device. The control device controls the camera so that photographs are taken under each illumination pattern.