Monochromatic Camera Imaging for Board Work Systems
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Solution Overview
Problem
In board work systems, target objects recognized by cameras often suffer from color bleeding or false colors when generating color images, leading to inefficient imaging processes, as high-resolution color images require combining monochrome images from red, green, and blue lights, prolonging processing time.
Innovation Solution
The system allows selective use of one or multiple monochromatic lights to obtain either a monochrome or composite image, with the option to combine monochrome images from red, green, and blue lights for high-resolution color images, reducing processing time by choosing the appropriate image type based on the target object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a color image is generated by combining monochrome images from red, green, and blue lights, then high-resolution color information is obtained free from color bleeding, but imaging time is unnecessarily long for target objects that can be recognized by monochrome images
Solution Approach 1:
The system dynamically adjusts the imaging mode (monochrome or color) based on the specific recognition requirements of each target object. The control unit determines whether color information is necessary for accurate recognition, and only activates the full color imaging process when needed, thereby optimizing imaging time while maintaining recognition precision.
Solution Approach 2:
The system changes the imaging parameters (number of light sources activated, image combination process) based on the target object's characteristics. For objects recognizable in monochrome, only single-wavelength imaging is performed; for objects requiring color differentiation, multi-wavelength combination imaging is executed, thus adapting the imaging process to the specific needs of each target.
2Loss of time
If monochrome images are used for all target objects, then imaging time is reduced, but target objects that require color information cannot be adequately recognized
Solution Approach 1:
The system dynamically switches between monochrome and color imaging modes based on real-time assessment of target object characteristics. The control unit evaluates whether color information is necessary for accurate recognition and adjusts the imaging strategy accordingly, ensuring both speed and accuracy are optimized for each specific case.
Solution Approach 2:
The imaging parameters are changed based on target object requirements. The system adjusts the number of wavelengths used, the combination processing level, and the final image output format to match the specific recognition needs of each target, thereby achieving both time efficiency and recognition accuracy.
3Quantity of substance
If color information is generated by using four pixels as one unit, then color images can be obtained, but recognition precision deteriorates due to color bleeding or false colors
Solution Approach 1:
The system segments the color imaging process into independent single-wavelength imaging steps. Instead of using color filters that cause pixel interference, the system captures separate monochrome images at different wavelengths and combines them computationally, eliminating color bleeding while preserving color information.
Solution Approach 2:
The system uses computational processing as an intermediary between light capture and final image generation. By processing separate monochrome images through algorithms that combine wavelength information without physical pixel mixing, the system produces accurate color images free from the color bleeding that plagues conventional color camera systems.
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
This approach enables efficient image processing by selecting between monochrome and high-resolution composite images, improving recognition precision and reducing overall processing time, especially for objects that can be adequately recognized in monochrome.
Implementation Method 1
Light reflected by the PCB and/or light passing through the PCB is detected separately according to basic colours
Implementation Method 2
a monochromatic camera to obtain a monochromatic image of a target object which is illuminated with the one monochromatic light
Data Source
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AI summary
A board work system includes a moving device configured to move over an XY-plane, a lighting device attached to the moving device, a monochromatic camera attached to the moving device, and an image processing device. The image processing device selects one or multiple monochromatic lights from at least two monochromatic lights based on a target object and, in the case that the image processing device selects one monochromatic light, the image processing device causes the lighting device and the monochromatic camera to capture a monochromatic image of the target object which is illuminated with the one monochromatic light and sets the monochromatic image of the target object as a target object inspection image. On the other hand, in the case that the image processing device selects multiple monochromatic lights, the image processing device causes the lighting device and the monochromatic camera to capture monochromatic images of the target object which is illuminated independently with the multiple monochromatic lights and sets a composite image into which the monochromatic images are combined as a target object inspection image.