Tilt and Aperture Control for Variable In-Focus Range
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Solution Overview
Problem
Monitoring cameras installed at high angles often face challenges in maintaining focus on objects of varying heights due to limited depth of field and the need for manual adjustment of tilt angles and aperture stops, which is time-consuming and labor-intensive.
Innovation Solution
A control apparatus that includes a tilt changing unit and an aperture driving unit, allowing for easy adjustment of the in-focus range by requesting and displaying settings on a GUI, enabling users to intuitively change the tilt angle and aperture value to maintain focus on multiple objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the aperture stop is narrowed to increase depth of field, then the depth of field is improved, but the illumination intensity decreases and the adjustment range is limited
Solution Approach 1:
The system changes the tilt angle parameter of the optical system to adjust the focal plane orientation, allowing the depth of field to be extended in specific directions without necessarily narrowing the aperture stop, thus maintaining illumination intensity while improving depth of field coverage for objects at different heights
2Reliability
If the aperture stop is further narrowed to increase depth of field for multiple objects, then the depth of field is improved, but the illumination intensity decreases and image quality deteriorates
Solution Approach 1:
The system uses tilt angle adjustment to reorient the focal plane to match the plane containing multiple objects at different heights, achieving extended depth of field coverage without excessive aperture narrowing, thereby maintaining acceptable image quality and illumination levels
3Reliability
If manual adjustment of tilt angle and aperture stop is performed, then the in-focus range can be set, but the process requires time and labor and is difficult to perform while checking shot images
Solution Approach 1:
The system provides self-service by automatically calculating and displaying the in-focus range based on current tilt angle and aperture stop settings, allowing users to easily adjust parameters while viewing the predicted in-focus range on the display unit, thereby reducing adjustment time and effort
Solution Approach 2:
The system implements feedback by displaying the calculated in-focus range on the display unit based on current settings, providing real-time information to users about how parameter changes will affect the in-focus range, enabling easier and faster manual adjustment
Data Source
AI summary
In an image pickup apparatus that can change an in-focus range by driving an aperture stop and changing a tilt angle, the in-focus range can be easily changed. A control apparatus of an image pickup apparatus includes a tilt changing unit that changes a tilt angle that is a relative angle between a lens and an image pickup element and an aperture driving unit that drives an aperture stop. The control apparatus comprises a request unit configured to request the image pickup apparatus to provide any one of at least the tilt angle, an aperture value, and a focus position; and a display controller configured to display an in-focus range of the image pickup apparatus on a display unit, wherein the display controller changes a content to be displayed on the display unit based on the information acquired by the request unit.