3D Component Detection Using Multi-Chroma-Key Background
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Solution Overview
Problem
Existing devices for detecting electronic components in 3D space suffer from excessive background reflection in glossy fragments, leading to inaccurate determination of component position due to indistinguishable details from the background.
Innovation Solution
A device utilizing a chroma-key background with at least two uniform chroma-key fields spaced 90° apart on the color wheel, combined with two cameras directed diagonally at different colored fields, employs a triangulation algorithm and chroma-keying to separate components from the background and detect edges, reducing reflections and enhancing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a uniform chroma-key background is used in the viewing area of cameras, then the background provides a consistent reference for detection, but the background colour reflects excessively in glossy fragments of components, making them indistinguishable from the background
Solution Approach 1:
The background is divided into multiple chroma-key fields with different colours (e.g., green and blue) arranged in specific patterns. Each camera views a specific coloured field, and the colour is selected to minimize reflection in glossy fragments. This local differentiation of background properties eliminates the harmful reflection effect while maintaining chroma-key functionality.
Solution Approach 2:
The patent uses multiple chroma-key colours (green, blue, red, yellow) arranged in fields across the background. By changing the background colour in different spatial regions and selecting colours that minimize reflection for specific camera angles, the system eliminates the problem of glossy fragments blending with the background while maintaining effective chroma-key separation.
2Measurement precision
If multiple cameras are used to detect details in 3D space, then detection accuracy is improved, but detection time increases
Solution Approach 1:
The background chroma-key fields are pre-configured with specific colours and patterns that optimize separation for multiple camera angles. This preliminary arrangement allows simultaneous multi-camera detection without requiring complex real-time background adaptation, reducing detection time while maintaining 3D accuracy.
Solution Approach 2:
The detection system segments the viewing area into multiple chroma-key fields, with each camera assigned to detect specific fields. This segmentation allows parallel processing by multiple cameras simultaneously, maintaining 3D detection accuracy while reducing overall detection time through concurrent operation.
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
Achieves precise determination of component position with an accuracy of hundredths of a millimeter and reduces detection time to less than one second by eliminating or minimizing background reflections, enabling fast and accurate 3D detection.
Implementation Method 1
the uniform background in the viewing area of their cameras causes an excessive increase in the degree of reflection of the background colour in the details of the tested component
Implementation Method 2
using a triangulation algorithm, determine coordinates of points for each axis in the Cartesian coordinate system forming edges of the tested component
Data Source
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AI summary
The invention relates to a device (1) for detecting components and their details in 3D space, and in particular for detecting details of electronic components. The device (1) for detecting components and their details in 3D space, especially details of electronic components, comprises a housing (2), a chroma-key background (3), an image capture unit containing at least two cameras (4, 4'), a measurement area (5) intended for placing the tested component in it, located between the image capturing unit and the chroma-key background (3), as well as the processing and control unit (9). The chroma-key background (3) contains at least two uniform chroma-key fields (7, 7') with colours that are at least 90° apart on the colour wheel. The cameras (4, 4') of the image capture unit are directed diagonally towards the chroma-key fields (7, 7'), the individual cameras (4, 4') facing the chroma-key fields (7, 7') of different colours.