Multi-Camera Zoom FOV Center Transition for Stable Framing
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Solution Overview
Problem
The field of view (FOV) center jump occurs during zooming in electronic devices with multiple cameras, causing inconsistent framing and affecting user experience.
Innovation Solution
Implementing incremental eccentric cropping and optical image stabilization (OIS) to smoothly transition the FOV center by adjusting the offset between camera lenses, ensuring a gradual change in the field of view as the zoom ratio approaches or moves away from the camera switching point.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple cameras with different focal lengths are used to implement zoom photographing, then the zoom ratio range is extended, but an FOV center jump occurs during camera switching
Solution Approach 1:
The patent performs preliminary action by gradually transitioning the FOV center position before camera switching occurs. As the zoom ratio approaches the switching point, the FOV center is progressively adjusted from the first camera's center to the second camera's center, ensuring smooth transition and avoiding abrupt jumps when cameras are switched
Solution Approach 2:
The patent applies dynamics by making the FOV center position adjustable and transitionable rather than fixed. The FOV center dynamically changes its position based on the current zoom ratio and which camera is active, allowing seamless adaptation during camera switching while maintaining continuous framing stability
2Stability of the object's composition
If the FOV center is adjusted during zooming to avoid jumping, then framing consistency is improved, but additional processing complexity is introduced
Solution Approach 1:
The patent changes parameters by adjusting the FOV center position as a variable parameter during zooming. The FOV center coordinates are modified based on the zoom ratio and camera switching state, allowing smooth transition without requiring complex hardware modifications or additional camera components
Data Source
AI summary
In accordance with an embodiment, a method of operating an electronic device comprising a screen, a first camera, and a second camera, includes: detecting that a zoom ratio gradually changes within a first ratio range, wherein the zoom ratio in the first ratio range is less than an optical zoom ratio of the second camera, and a ratio difference between the zoom ratio within the first ratio range and the optical zoom ratio of the second camera is less than a first value; cropping an image captured by the first camera to obtain a preview image whose field of view (FOV) size gradually changes; and displaying on the screen, the preview image whose FOV size gradually changes.