Optical Device Shake Correction Filter Coordination
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Solution Overview
Problem
Existing image blur correction systems face performance deterioration due to differences in shake detection unit performance and filter characteristics between the lens-side and camera-side shake correction units, leading to incomplete correction of image blur, especially in the low frequency domain.
Innovation Solution
An optical device with a processor and memory that includes a correction unit for image blur correction, a control unit for processing shake signals using first and second filters, and a communication unit for receiving filter information from a connected device, allowing for coordinated control of both shake correction units to suppress performance deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the lens-side shake correction means and camera-side shake correction means perform image blur correction independently of each other, then the communication requirement between lens device and camera body is reduced, but correction remainder may occur in shake correction depending on frequency components included in the image blur
Solution Approach 1:
The camera body transmits filter information (third filter information) to the lens device, and the lens device uses this information to set its filter characteristics (second filter) to match the camera body's filter. This feedback mechanism ensures coordinated operation between the independent shake correction means, preventing correction remainder while maintaining independent operation and reducing communication requirements.
Solution Approach 2:
The lens device dynamically adjusts its filter characteristics by changing parameters based on the received third filter information from the camera body. This parameter adjustment allows the lens-side shake correction to complement the camera-side correction, ensuring complete frequency domain coverage without requiring constant high-speed communication.
2Reliability
If the lens-side shake correction means and camera-side shake correction means perform image blur correction in cooperation, then image blur correction performance is improved, but high-speed communication between lens device and camera body is always necessary
Solution Approach 1:
The filter information is transmitted from the camera body to the lens device in advance, allowing the lens device to pre-set its filter characteristics to match the camera body's filter. This preliminary action enables coordinated shake correction operation without requiring continuous high-speed communication during the correction process.
3Ease of operation
If shake detection means performance differs between lens device and camera body, then independent shake correction operation becomes possible, but frequency components in image blur may not be completely corrected
Solution Approach 1:
The filter information acts as an intermediary that bridges the performance differences between the lens-side and camera-side shake detection means. By transmitting this information from the camera body to the lens device, the system enables independent operation while ensuring that both correction means work complementarily to cover the complete frequency domain, preventing correction remainder.
Data Source
AI summary
A second optical device that can be mounted on a first optical device provided with an image blur correction unit comprising: at least one processor and memory holding a program which makes the processor function as: a correction unit configured to correct an image blur based on a shake signal output by a detection unit after the detection unit detects shaking of the second optical device; a control unit configured to control the correction unit by calculating signals respectively processed by first and second filters with respect to the shake signal; and a communication unit configured to receive third filter information to be used by an image blur correction unit of the first optical device from the first optical device, wherein a characteristic of the second filter is set based on the third filter information acquired by the communication unit.