Virtual Narrow-Angle Video Extraction from Wide-Angle Streams
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Solution Overview
Problem
Security systems face a tradeoff between area coverage and detail in video surveillance, with wide-angle cameras providing poor resolution and many narrow-angle cameras being costly and complex to maintain.
Innovation Solution
A method to automatically extract virtual narrow-angle views from a wide-angle video stream, allowing fewer cameras to monitor large areas while providing detailed imagery of targets or events of interest, using video analytics to detect and enhance image data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If wide-angle cameras are used to monitor large areas, then area coverage is improved, but video resolution and detail quality deteriorate
Solution Approach 1:
The patent segments the wide-angle video stream into multiple virtual narrow-angle views by dividing the field of view into distinct regions of interest. This allows the system to maintain broad area coverage while extracting detailed views of specific areas, effectively resolving the contradiction between wide coverage and high resolution.
Solution Approach 2:
The patent extracts virtual narrow-angle video streams from the wide-angle video stream by identifying and isolating regions of interest. This extraction process enables the system to provide detailed views of specific areas while maintaining the benefit of wide-angle coverage, as the detailed views are derived from the broader context.
2Measurement precision
If multiple narrow-angle cameras are used to provide detailed views, then video resolution is improved, but device complexity and operating cost increase
Solution Approach 1:
The patent merges the functionality of multiple narrow-angle cameras into a single wide-angle camera system by extracting virtual narrow-angle views from one wide-angle stream. This consolidation reduces the number of physical cameras needed while maintaining detailed views, thereby reducing device complexity and operating costs.
Solution Approach 2:
The patent creates virtual copies of narrow-angle views from the wide-angle video stream. Instead of using multiple physical cameras, the system generates synthetic narrow-angle views through image processing and extraction algorithms, effectively replicating the function of multiple cameras with a single device.
3Measurement precision
If multiple narrow-angle cameras are deployed, then detail of activities is improved, but ease of operation deteriorates due to increased complexity for manual operators
Solution Approach 1:
The patent implements automated feedback mechanisms where the system continuously analyzes the wide-angle video stream, identifies regions of interest, and extracts relevant narrow-angle views automatically. This automated feedback loop eliminates the need for manual operators to manage multiple camera feeds, maintaining situational awareness while providing detailed views through automated processing.
Data Source
AI summary
The automatic generation (702) of one or more secondary video streams based on an input primary video stream (701) may use analytics performed on the video to provide information on targets, events, and/or areas of interest to permit the one or more secondary video streams (703) to concentrate on one or more targets, events, and/or areas of interest.