Dual Camera Video Surveillance System Event Detection
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Solution Overview
Problem
Conventional video surveillance systems require substantial memory media to record continuous high-definition video, leading to high costs and often resort to low-definition recording, which compromises the quality and detail of captured events, making it difficult to identify individuals.
Innovation Solution
A dual-camera system with a lower definition camera for continuous recording and a higher definition camera that activates only upon detecting predefined events, along with an artificial light source and event sensors for enhanced detail capture, reduces storage needs by recording high-definition video only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If continuous high-definition video recording is used, then event capture quality is improved, but storage media requirements increase substantially
Solution Approach 1:
The system uses a lower definition camera for continuous monitoring and only activates the higher definition camera periodically when events are detected by the event sensor, rather than maintaining high-definition recording continuously. This periodic activation of high-definition recording based on detected events resolves the contradiction between capture quality and storage requirements.
2Quantity of substance
If low-definition video recording is used, then storage media requirements are reduced, but video quality and detail are compromised
Solution Approach 1:
The system employs two cameras with different definition levels: a lower definition camera for continuous monitoring and a higher definition camera for event-specific recording. This local differentiation of quality levels allows the system to maintain high quality where needed (during events) while reducing overall storage requirements during normal operation.
3Measurement precision
If a higher definition camera operates continuously, then event detail capture is improved, but energy consumption increases
Solution Approach 1:
The higher definition camera remains off during normal operation and is activated only periodically when the event sensor detects predefined events. This periodic operation mode maintains the ability to capture detailed event information while dramatically reducing energy consumption compared to continuous high-definition operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces storage requirements while maintaining high-quality event recordings, enabling better identification of individuals and reducing storage costs by limiting high-definition recording to specific events.
Implementation Method 1
the higher definition video system includes an infrared camera
Implementation Method 2
the event sensor is configured to detect a human in motion in a field of view of the lower definition video camera in the lower definition video stream
Implementation Method 3
the event sensor further includes a microphone that is configured to receive acoustic signals from an area in a field of view of the lower definition video camera
Data Source
AI summary
A surveillance system includes a lower definition video camera and a higher definition video camera. The higher definition video is not recorded, generally, but video produced by the lower definition video camera is processed and compared to predefined videographic patterns to determine whether one or more events corresponding to the predefined videographic patterns has occurred. Likewise, inputs from other sources, such as audio, can be evaluated to determine if any predefined events have occurred. Upon determining that a predefined or triggering event has occurred, then video from the higher definition camera is recorded.