Camera Shake Detection Device with Periodic Sensor and Image Analysis
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Solution Overview
Problem
Existing shake detection systems for cameras, which use gyro sensors to detect motion and correct image shifts, consume excessive power, leading to shortened battery life due to continuous operation of detection sensors.
Innovation Solution
A shake detection device that employs a single or dual detection sensors to calculate vertical and horizontal image shift amounts by analyzing rotation speeds and image data, allowing for precise estimation of camera shake without continuous sensor operation, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If detection sensors are driven continuously to detect shake amount, then image shift suppression is improved, but battery lifespan is shortened
Solution Approach 1:
The detection sensor is driven periodically at specific intervals (e.g., every 5 seconds) rather than continuously, allowing the system to detect shake amounts at regular intervals while reducing overall power consumption and extending battery lifespan.
Solution Approach 2:
The system performs preliminary actions by storing image data in a buffer and pre-calculating shake amounts based on previously captured images, allowing shake detection without continuously driving the sensor during the actual photographing moment.
2Measurement precision
If detection sensors are driven continuously to detect shake amount, then shake detection precision is improved, but power consumption increases
Solution Approach 1:
The detection sensor operates periodically at predetermined intervals rather than continuously, maintaining adequate shake detection precision for capturing still images while dramatically reducing power consumption by keeping the sensor inactive during non-critical periods.
Solution Approach 2:
The system uses partial action by driving the detection sensor only for the minimum necessary duration to capture shake data, and uses image analysis of already-captured images to supplement shake detection, avoiding excessive sensor operation.
3Measurement precision
If multiple detection sensors are used to calculate accurate shake amount, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The system transitions from relying solely on multiple physical detection sensors to incorporating a temporal dimension by analyzing sequences of images captured over time, allowing accurate shake amount calculation through image comparison rather than requiring multiple simultaneous sensors.
Solution Approach 2:
Image data serves as an intermediary medium that bridges the gap between limited sensor readings and accurate shake detection, allowing the system to calculate shake amounts by analyzing changes in image content between captured frames.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively suppresses image shifts in photographed images while extending battery life by selectively driving detection sensors only when necessary, using image analysis to estimate shake amounts with high precision.
Implementation Method 1
A predetermined angular speed around an axis is detected by detecting a change in vibration state of the vibrator
Data Source
AI summary
A shake detection device detecting a camera shake amount generated when photographing a subject includes a detection sensor detecting a rotation speed around a predetermined axis of the camera, a first image shift amount calculation unit driving the detection sensor to detect the rotation speed and, for an image of the subject photographed by the camera, calculating a first image shift amount as an image shift amount in a first direction based on the rotation speed, a second image shift amount calculation unit performing a predetermined image analysis on the image of the subject photographed by the camera and, for the image of the subject photographed by the camera, calculating a second image shift amount as an image shift amount in a second direction based on the analysis result, and a shake amount estimation unit estimating the camera shake amount using the first and second image shift amounts.