Image Stabilization Shift Lens Control for Panning Shots
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Solution Overview
Problem
Conventional image stabilization techniques for panning shots struggle to stabilize the camera before shooting and accurately correct image blur caused by camera shake, especially when using lenses with long focal lengths, leading to difficulties in maintaining the subject within the frame and potentially missing photo opportunities.
Innovation Solution
An image stabilization apparatus that calculates the angular velocity of the camera and object motion, adjusts the image stabilization unit before and during exposure to correct image blur, and moves the shift lens to optimize the image output region, ensuring stable panning shot assistance by limiting the image output region and adjusting the shift lens position based on calculated motion vectors and angular velocities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the camera shake correction function is stopped before shooting to accurately detect object motion, then measurement precision is improved, but stability of the object's composition deteriorates because the subject cannot be kept within the angle of view
Solution Approach 1:
The system dynamically switches between two operational modes: before shooting, image stabilization is activated to keep the subject stable in the angle of view, enabling accurate motion detection; during shooting, image stabilization is deactivated to allow accurate detection of object motion for panning shot correction. This dynamic switching resolves the contradiction by adapting the system behavior to the specific operational phase.
2Stability of the object's composition
If image stabilization is activated before shooting to stabilize the camera, then stability of the object's composition is improved, but measurement precision deteriorates because object motion cannot be accurately detected
Solution Approach 1:
The system dynamically switches between two operational modes: before shooting, image stabilization is activated to keep the subject stable in the angle of view, enabling accurate motion detection; during shooting, image stabilization is deactivated to allow accurate detection of object motion for panning shot correction. This dynamic switching resolves the contradiction by adapting the system behavior to the specific operational phase.
3Manufacturing precision
If the shift lens position is adjusted to correct image blur during exposure, then image quality is improved, but device complexity increases due to additional control mechanisms
Solution Approach 1:
The system performs preliminary calculations of the shift lens position based on detected object motion and camera shake during the exposure period. By pre-calculating the required correction amounts and applying them in advance or concurrently with exposure, the system achieves effective image blur correction without requiring complex real-time adaptive control mechanisms during the actual exposure.
Solution Approach 2:
The system uses feedback from angular velocity sensors and image processing to continuously monitor camera shake and object motion, then adjusts the shift lens position accordingly. This feedback mechanism enables automatic correction of image blur while maintaining relatively simple control logic by relying on sensor data and predetermined correction algorithms.
Data Source
AI summary
An image stabilization apparatus includes: a first calculation unit that calculate an angular velocity; a second calculation unit that calculates a motion vector of an object; a third calculation unit that calculates a current position of an image stabilization unit; a fourth calculation unit that calculates an angular velocity of a motion of the object; and a control unit. The control unit controls, before the image capturing apparatus is released, the image stabilization unit so as to correct an image blur, moves, an output position of an image from the image capturing unit, and controls, after the image capturing unit has started exposure, so as to correct an image blur based on an angular velocity of the image capturing apparatus and an angular velocity of the object.