Imaging Device Focus Setting Using User Intent and Depth
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Solution Overview
Problem
Existing imaging devices fail to accurately perform focus control in accordance with the user's intended subject, as they rely on automatic determination without considering manual user input.
Innovation Solution
The imaging device includes a user operation detection unit, focus position movement detection unit, and depth information detection unit to detect user operations and set a target focus position based on the user's intended focus movement and depth information, allowing for accurate manual focus control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If automatic focus control is used to determine the main subject, then focus control can be performed automatically, but the focus control does not always match the user's intended subject
Solution Approach 1:
The system detects user operations on the focus ring during manual focus mode, uses this feedback to determine the user's intended focus target, and automatically switches to autofocus control that focuses on the identified target. This feedback loop combines manual user input with automatic execution to resolve the contradiction between automation and accuracy.
Solution Approach 2:
The focus ring operation detection serves as an intermediary between the user's intent and the autofocus system. By detecting the direction and extent of focus ring movement, the system identifies which subject the user intends to focus on, then activates autofocus to precisely focus on that target, bridging the gap between manual indication and automatic execution.
2Measurement precision
If manual focus control is used continuously to maintain focus on the intended subject, then focus accuracy can be maintained, but the operation becomes cumbersome and time-consuming
Solution Approach 1:
The user performs a preliminary action by rotating the focus ring to indicate the desired focus target. The system then uses this preliminary indication to automatically execute the focus control, eliminating the need for continuous manual adjustment. This preliminary action triggers the automated focus maintenance, reducing ongoing operational burden.
Solution Approach 2:
Once the user indicates the intended target through focus ring operation, the system takes over and automatically maintains focus on that target without requiring further user intervention. The autofocus mechanism serves itself by continuously adjusting focus based on the initially detected user intent, freeing the user from continuous manual operation.
3Speed
If the focus position is changed frequently to track the user's intended subject, then focus control responsiveness is improved, but the system complexity increases
Solution Approach 1:
The system extracts only the essential information from user focus ring operations - the direction and extent of rotation - to identify the intended focus target. By extracting this key information rather than processing all possible control parameters, the system achieves responsive focus control while keeping the control logic relatively simple and avoiding unnecessary complexity.
Data Source
AI summary
An imaging device according to the present technology includes a user operation detection unit that detects an operation of a user for focus control, a focus position movement detection unit that detects movement of a focus position based on the operation of the user detected by the user operation detection unit, a depth information detection unit that detects depth information in a focus control target area, and a focus control unit that sets a target focus position on the basis of the movement of the focus position and the depth information. Thus, a technology for executing focus control more in accordance with a user's intention is proposed.