Image Blur Correction Apparatus Walking State Detection
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Solution Overview
Problem
Existing image blur correction apparatuses face challenges in accurately determining the shooting state, particularly during walking, leading to inconsistent image blur correction due to varying hand shake characteristics and user behavior, which can result in incomplete or inaccurate correction.
Innovation Solution
An image blur correction apparatus that utilizes a shooting state detecting portion to determine the current shooting state based on angular velocity signals, employing different integral characteristics to adjust the lens driving range accordingly, thereby optimizing image blur correction for specific shooting states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If image blur correction is performed based on hand shake amount alone, then correction can be applied during stable conditions, but detection accuracy deteriorates during walking when users unconsciously absorb hand shake
Solution Approach 1:
The patent segments the detection of hand shake into two independent components: angular velocity signal detection (for walking state identification) and image blur amount detection (for correction intensity determination). This segmentation allows the system to reliably distinguish walking from rest conditions while maintaining accurate blur correction, resolving the contradiction by using multiple detection dimensions rather than relying on a single hand shake measurement.
Solution Approach 2:
The patent introduces an intermediary detection mechanism (angular velocity signal detection unit) that acts as a mediator between the camera system and the control unit. This intermediary component detects the walking state through angular velocity signals, providing contextual information that prevents false termination of blur correction during walking, thereby improving both reliability and measurement precision simultaneously.
2Adaptability or versatility
If lens driving range is widened for telephoto side, then correction capability improves, but device complexity increases due to additional control mechanisms
Solution Approach 1:
The patent implements dynamic control of the lens driving range based on real-time detection of shooting state and hand shake characteristics. The control unit adjusts the lens driving range dynamically - widening it when walking state is detected and narrowing it during rest conditions. This dynamic adjustment allows the system to achieve high adaptability and correction capability without requiring a permanently complex control mechanism, as the complexity is activated only when needed.
Data Source
AI summary
An image blur correction apparatus includes an shooting state detecting portion that determines a shooting state of a first shooting state or a second shooting state based on an angular velocity signal, and a controller that performs an image blur correction using characteristics depending on a determination result of the shooting state determining portion, and the shooting state determining portion determines that the first shooting state has started when the angular velocity signal exceeds a first threshold value and exceeds a second threshold value having an opposite sign of the first threshold value within a predetermined time after exceeding the first threshold value, and determines that the first shooting state is continuously maintained when the angular velocity signal exceeds a third threshold value and exceeds a fourth threshold value that has an opposite sign of the third threshold value within the predetermined time after exceeding the third threshold value.