Imaging Device Autofocus Region Adjustment
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Solution Overview
Problem
Conventional imaging devices lack the ability to dynamically adjust the focusing region based on the position of the subject, often resulting in incorrect focusing, especially when the subject moves within the frame.
Innovation Solution
An imaging device equipped with an image sensor and an image recognizer that captures and processes images to recognize the subject, and a controller that adjusts the focusing region based on the recognition results, allowing for dynamic focusing on the subject's position by setting the focusing region to a desired area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a predetermined region is fixedly set as the focusing region, then the focusing operation is simple and reliable, but the focusing region cannot adapt to the subject's position changes
Solution Approach 1:
The focusing region is changed from a fixed predetermined region to a dynamic region that automatically adjusts based on the subject's position. The controller determines the focusing region by recognizing the subject's position in the captured image, allowing the focusing region to move and adapt as the subject moves within the frame.
Solution Approach 2:
The system uses feedback from the recognizer that detects the subject's position to control the focusing region. The controller receives information about the subject's position from the recognizer and uses this feedback to determine where to set the focusing region, creating a closed-loop control system that adapts to changing conditions.
2Measurement precision
If the focusing region is dynamically adjusted based on subject position, then focusing accuracy is improved, but the control complexity increases
Solution Approach 1:
The recognizer acts as an intermediary component between the imager and the controller. It processes the captured image to determine the subject's position and provides this information to the controller, which then uses it to determine the focusing region. This intermediary approach simplifies the overall control logic by separating the recognition function from the control function.
Solution Approach 2:
The system performs self-service by automatically determining the focusing region based on the subject's position without requiring manual intervention. The controller automatically uses the recognizer's output to set the focusing region, making the system autonomous in its focusing operation.
3Reliability
If the focusing region is set based on subject recognition, then the subject remains in focus during movement, but the processing time increases
Solution Approach 1:
The system performs preliminary action by continuously recognizing the subject's position in the captured image before the focusing operation is completed. The controller determines the focusing region in advance based on the subject's position, allowing the focusing system to be prepared and adjusted proactively as the subject moves, rather than reacting after the fact.
Data Source
AI summary
An imaging device includes an imager configured to capture a subject to generate a captured image; a recognizer configured to recognize the subject on the captured image; and a controller configured to control a focusing operation based on a focusing region set on the captured image, wherein the controller, when the subject is recognized to be present in a first determination region in a state where the focusing region is set on a predetermined region fixedly arranged on the captured image, sets the focusing region depending on a recognition result of the recognizer instead of the predetermined region.