Dual-Module Video Recording Focus Adjustment
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Solution Overview
Problem
Video recording devices face challenges in maintaining clear recordings due to changes in the relative distance between the target and the device, leading to jitter in the recording content as the zoom lens continuously adjusts to focus on moving targets.
Innovation Solution
A video recording device and method utilizing two capturing modules, where a main capturing module records the target and a supplementary capturing module assists in updating the focus parameters, allowing for rapid adjustment of the main focus parameter based on supplementary focus parameters obtained from supplementary capturing pictures, thereby reducing the need for frequent adjustments of the zoom lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the zoom lens continuously adjusts its focus parameter to track moving targets, then the recording clarity is improved, but video jitter occurs due to frequent lens position changes
Solution Approach 1:
The patent divides the focus adjustment function into two segments: a main capturing module that performs recording and a supplementary capturing module that assists in focus parameter determination. By segmenting the focusing task, the system can use the supplementary module to predict needed focus adjustments before they affect the main recording, thereby reducing jitter while maintaining clarity.
Solution Approach 2:
The supplementary capturing module captures images and determines focus parameters in advance before the main capturing module needs to adjust its focus. This preliminary action allows the system to prepare focus parameter updates ahead of time, reducing the frequency and impact of lens position changes during actual recording and thereby minimizing video jitter.
2Measurement precision
If the zoom lens position is frequently adjusted to maintain focus on moving targets, then focus accuracy is improved, but recording stability deteriorates
Solution Approach 1:
The supplementary capturing module acts as an intermediary between the moving target and the main capturing module's focus system. It captures intermediate images and processes focus parameter information, serving as a mediator that provides stable focus guidance without requiring frequent direct adjustments to the main recording lens, thus maintaining both accuracy and stability.
Solution Approach 2:
The system uses the supplementary capturing module to continuously monitor focus conditions and provide feedback information about the required focus parameter adjustments. This feedback mechanism allows the main capturing module to make more informed, less frequent adjustments, improving recording stability while maintaining focus accuracy through continuous parameter optimization.
3Measurement precision
If the focus parameter is updated frequently to track target movement, then focus tracking accuracy is improved, but the number of lens adjustments increases causing jitter
Solution Approach 1:
The supplementary capturing module performs partial focus tracking actions by capturing and processing images to determine focus parameters, but these actions are used to inform rather than directly control the main capturing module's lens adjustments. This partial action approach allows for accurate focus tracking information to be gathered without the excessive lens adjustments that would cause jitter and reduce recording efficiency.
Data Source
AI summary
A video recording device and an associated video recording method are provided. The video recording device includes a main capturing module, a supplementary capturing module and a controller. The main capturing module records a to-be-captured target according to a main focus parameter. The supplementary capturing module captures the to-be-captured target and generates a plurality of supplementary capturing pictures. The controller is electrically connected to the main capturing module and the supplementary capturing module. The controller selectively updates the main focus parameter according to the supplementary focus parameter. The supplementary focus parameter is obtained according to the supplementary capturing pictures.