Vision System Aperture Control for Fixed-Focus Distance Imaging
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Solution Overview
Problem
Robot vision systems using cameras with focus functions face challenges in efficiently obtaining spatial position information of objects due to the need for frequent adjustments of focus positions, which complicates processing and reduces accuracy.
Innovation Solution
An image processing device that includes an aperture control unit to adjust the lens aperture based on the distance between the camera and the object, allowing for fixed focus positions and reduced need for parameter changes, thereby simplifying and speeding up the image processing for obtaining spatial position information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a camera with a focus function is used to capture sharp images at different distances, then image quality is improved, but processing complexity increases and accuracy decreases due to frequent focus adjustments and parameter changes
Solution Approach 1:
The patent segments the imaging process by using multiple cameras with different fixed focal lengths (e.g., wide-angle and telephoto cameras). Each camera is optimized for specific distance ranges, eliminating the need for a single camera to continuously adjust focus. This segmentation allows the system to maintain simple fixed-focus processing while achieving sharp images across various distances by selecting appropriate cameras based on object distance.
2Measurement precision
If focus position is adjusted frequently to maintain sharp images at different distances, then image quality is improved, but processing time increases
Solution Approach 1:
The patent implements a dynamic camera selection mechanism that automatically chooses the appropriate camera based on real-time object distance detection. Instead of dynamically adjusting focus (which is time-consuming), the system dynamically selects from multiple pre-configured cameras with different fixed focal lengths. This dynamic selection maintains image quality across varying distances while avoiding the time penalty of continuous focus adjustment.
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 image processing for obtaining spatial position information in a short time with high accuracy, reducing processing complexity and errors associated with focus adjustments.
Implementation Method 1
when a distance from the image capturing device to the object is a first distance, a focus position of the lens is adjusted and fixed, the aperture control unit sets the aperture of the lens to a first aperture
Data Source
AI summary
An image processing device comprises an aperture control unit that obtains, on the basis of image information from an image capture device that has a lens and captures an image of an object, spatial position information of the object and controls the aperture of the lens. When the distance from the image capture device to the object is a first distance, the image capture device captures an image of the object to obtain a first image with the focus position for the lens adjusted and fixed, and with the aperture of the lens set to a first aperture by the aperture control unit. When the distance from the image capture device to the object is a second distance, the image capture device captures an image of the object to obtain a second image with the aperture of the lens set to a second aperture by the aperture control unit.