Single-Lens Multi-Focus Video Capture via Segmented Frame Storage
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Solution Overview
Problem
Recent camera-equipped electronic devices are inefficient in terms of cost and power consumption when using multiple lenses for multi-focus videos, and they do not allow real-time focus adjustment or control of exposure time or white balance per frame during video playback.
Innovation Solution
An electronic device capable of capturing and storing multiple frames focused on different areas of a video, allowing real-time adjustment of focus, exposure time, and white balance during video playback, using a camera module, memory, and processor to selectively focus and store frames, and alternately display them at varying frame rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple lenses are used to capture multi-focus videos, then focus control on multiple areas is improved, but cost and power consumption increase
Solution Approach 1:
The video capture process is segmented into multiple passes, with each pass focusing on a different area. The camera captures frames focused on first areas, then frames focused on second areas, and so on. This segmentation allows a single lens to achieve multi-focus capability that would traditionally require multiple lenses, thereby reducing power consumption while maintaining adaptability.
Solution Approach 2:
The camera performs periodic refocusing between different areas during video capture. By alternating focus between multiple areas in a periodic manner and capturing frames at different focus points, the system achieves multi-focus video capability using a single lens, avoiding the continuous power consumption associated with multiple active lenses.
2Ease of operation
If real-time focus adjustment is implemented during video playback, then user interaction is improved, but device complexity increases
Solution Approach 1:
The system performs preliminary actions by capturing and storing multiple sets of video frames during the recording phase, with each set focused on different areas. This pre-capture of multi-focus frames eliminates the need for complex real-time optical switching or lens manipulation during playback, reducing device complexity while enabling user-friendly real-time focus adjustment through software selection of pre-captured frames.
3Manufacturing precision
If multiple frames focused on different areas are captured and stored, then video quality is improved, but memory requirements increase
Solution Approach 1:
Instead of storing complete multi-focus videos for all areas, the system applies local quality enhancement by capturing frames focused on specific first areas and second areas separately. This allows selective storage of high-quality focused frames for different regions, improving overall video quality while optimizing memory usage by storing only the necessary focused frames rather than redundant full-resolution multi-focus data.
Data Source
AI summary
Embodiments are directed to an electronic device including a camera module capturing a video, a memory, and a processor sequentially storing, in the memory, each of a plurality of frames respectively focused during the video capture on a plurality of frame areas selected from the video.