Imaging Focus Control Using Reference-Based Target Regions
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Solution Overview
Problem
Existing autofocus imaging devices struggle to adjust the focal position appropriately, particularly when objects other than the designated reference object enter or move within the imaging region.
Innovation Solution
The imaging device includes an object information acquisition unit to detect the position of objects, a target region acquisition unit to set a target region based on the position of a reference object, and a focal position controller to adjust the focal position on objects within this region, which is defined by distances and relative positions to the imaging device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the focal position is adjusted on a predetermined position designated by a user, then the focus can be set at a specific location, but the focus cannot be appropriately adjusted when other objects enter or move within the imaging region
Solution Approach 1:
The imaging device dynamically switches between two focusing modes: a first focusing mode for adjusting focus on a predetermined position designated by the user, and a second focusing mode for adjusting focus on objects detected within the imaging region. This dynamic mode switching enables the system to adapt to different scenarios, maintaining focus precision whether the subject is stationary or moving.
Solution Approach 2:
The system changes the focal position parameter based on detected objects. When an object is detected within the imaging region, the focal position is automatically adjusted to the detected object's position, transitioning from a user-designated fixed position to an object-based dynamic position, thereby improving adaptability to moving or entering objects.
2Measurement precision
If the target region is set based on position information of a reference object, then precise focusing on objects near the reference object is enabled, but the system complexity increases
Solution Approach 1:
A target region acquisition unit is introduced as an intermediary component that sets a target region based on position information of a reference object. This unit acts as a mediator between object detection and focal position control, defining a specific region around the reference object where other objects should be focused on, thereby enabling precise focusing while maintaining a clear and modular system structure.
Data Source
AI summary
An imaging device capable of imaging an object includes: an imaging element; an object information acquisition unit configured to acquire position information of an object existing in an imaging region of the imaging element; a target region acquisition unit configured to set a target region based on the position information of a reference object acquired by the object information acquisition unit; and a focal position controller configured to control a focal position of the imaging device so as to adjust, when an object other than the reference object exists in the target region, the focal position on the object, wherein the target region acquisition unit is further configured to set the target region based on the position information of the reference object located between a first position and a second position, and the position information is a relative position with respect to the imaging device.