Focus Chasing via Region of Interest Tracking for Camera Lens Switching
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Solution Overview
Problem
Current auto-focus-chasing methods often lose the focus target due to significant changes in the field of view during camera lens switching, leading to inaccurate focusing and a poor user experience.
Innovation Solution
A focus chasing method that determines a current preview picture and its position area within a target image, allowing focus chasing to be performed on the target object within this defined area, thereby maintaining consistent focus despite changes in the field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If auto-focus-chasing is performed on the entire target image, then the field of view covers the complete scene, but the focus target is easily lost due to significant changes in field of view during camera lens switching
Solution Approach 1:
The patent divides the target image into multiple region of interests (ROIs) based on spatial segmentation. Instead of processing the entire image, the system identifies and processes only specific regions where the focus target is likely to be located. This segmentation approach maintains focus tracking reliability while adapting to field of view changes during lens switching.
Solution Approach 2:
The patent applies local quality by determining different processing strategies for different regions of the image. The system identifies the region containing the focus target and applies focus chasing algorithms specifically to that local area, rather than uniformly processing the entire image. This improves both reliability and adaptability to field of view changes.
2Adaptability or versatility
If the field of view changes significantly during camera lens switching, then the camera can capture different scenes, but the focus chasing accuracy decreases due to loss of focus target
Solution Approach 1:
The patent performs preliminary actions by pre-determining the region of interest before focus chasing begins. The system identifies and marks the ROI containing the focus target in advance, then maintains this regional focus information throughout the lens switching process. This preliminary identification ensures that when field of view changes occur, the system can quickly re-acquire focus on the correct target without losing accuracy.
Solution Approach 2:
The patent implements feedback mechanisms that continuously monitor the focus target's position and adjust the region of interest accordingly. During lens switching, the system receives feedback about the changing field of view and dynamically updates the ROI to maintain accurate focus tracking. This feedback loop ensures both field of view adaptability and focus chasing accuracy are maintained simultaneously.
Data Source
AI summary
A focus chasing method includes: determining a current preview picture from a target image acquired by a terminal; determining a position area of the current preview picture in the target image in response to determining that there is a target focus chasing object in the current preview picture; and performing focus chasing on the target focus chasing object in the current preview picture according to the position area.