Camera Autofocus Main Subject Selection Using Posture Cues
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Solution Overview
Problem
Existing image capturing apparatuses struggle to accurately determine the main object when multiple objects are present, often focusing on unintended objects or experiencing sudden focus position changes during continuous photography.
Innovation Solution
An image capturing apparatus equipped with an object detection unit, posture detection unit, and focus detection unit, which sets a threshold value based on object posture and focusing state to determine the main object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the main object is determined from the positional relationship between two different types of objects, then the focus can be automatically adjusted, but an object different from the photographer's intention may be determined as the main object
Solution Approach 1:
The patent changes the parameters used for main object determination from purely positional relationships to include posture information and focusing state. By incorporating posture detection (object orientation, pose characteristics) and focus state detection (depth of field, focus distance), the system can accurately identify the intended main object even when multiple objects are present, resolving the contradiction between automated focus adjustment and determination accuracy.
2Extent of automation
If the main object is determined from the positional relationship between two different types of objects, then the focus can be automatically adjusted, but the focus position may suddenly change when the main object is replaced
Solution Approach 1:
The patent implements feedback mechanisms by continuously monitoring posture information and focusing state to verify whether the detected main object remains consistent with the photographer's intention. When object replacement occurs or focus state changes significantly, the system receives feedback and adjusts the focus position accordingly, preventing sudden and unintended focus changes while maintaining stable automatic focus adjustment.
3Productivity
If multiple objects are detected in continuous photographing, then the system can track moving objects, but it becomes difficult to determine which object should be the main object to focus on
Solution Approach 1:
The patent applies dynamics by making the main object determination adaptive and flexible rather than fixed. The system dynamically adjusts focus based on real-time posture detection and focusing state analysis, allowing the main object to be determined based on current scene conditions and object behaviors. This dynamic approach enables accurate main object identification in continuous photographing scenarios with multiple moving objects.
Data Source
AI summary
An image capturing apparatus includes an object detection unit configured to detect an object, a posture detection unit configured to detect a posture of the object, a focus detection unit configured to detect a focusing state of the object; and a setting unit configured to set a threshold value for determining whether or not to select the object as a main object based on a posture and the focusing state of the object.