Power-Saving Controller for Video Camera Face Detection
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Solution Overview
Problem
The increasing power consumption of video cameras equipped with face recognition functions poses a challenge in balancing multifunctionality with battery life, as conventional technologies fail to effectively reduce power usage without compromising usability.
Innovation Solution
The implementation of a power-saving method within the information recording apparatus that dynamically controls electric power consumption based on whether the camera is recording moving pictures and whether the face detection function is valid or invalid, utilizing features like adjustable LCD brightness and selective activation of face detection components to minimize unnecessary power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If face recognition function is activated and continuously operated, then face detection accuracy is improved, but electric power consumption increases
Solution Approach 1:
The face recognition controller operates intermittently rather than continuously. The control unit determines whether to activate face recognition based on recording state and detection history, creating periodic operation cycles that reduce power consumption while maintaining detection accuracy when needed.
Solution Approach 2:
The system dynamically adjusts the operation state of the face recognition controller based on real-time conditions. When recording is active or a face was recently detected, the controller remains active; otherwise, it enters a low-power state, making the system adaptive to operational requirements.
2Adaptability or versatility
If multiple control devices and recording media are integrated for multifunctionality, then device functionality is improved, but device complexity increases
Solution Approach 1:
The face recognition controller is integrated within the existing video camera system, sharing hardware resources and control infrastructure with other functions. This merging approach enables multifunctionality (face recognition, recording, playback) without proportionally increasing overall device complexity.
3Reliability
If face recognition controller is continuously operated, then detection reliability is improved, but power consumption increases
Solution Approach 1:
The control unit uses feedback from the recording state and face detection history to determine controller operation. This feedback mechanism ensures the controller activates reliably when needed (maintaining detection reliability) while remaining inactive during unnecessary periods (reducing power consumption).
Data Source
AI summary
An information recording apparatus for recording information obtained from a sensor, comprises: a face detecting unit for detecting a face of a person among the information obtained from the sensor; a face detection switching unit for switching a control of the face detecting unit between valid and invalid; a face detection setup information obtaining unit for obtaining information of whether face detection set up by the face detection switching unit is valid or invalid; a face detection observation unit for observing on whether detection is made on the face or not, when the face detection is valid; a power-saving controller unit for executing a power-saving control; a recording unit for record the information inputted from the sensor onto a recording medium; a recording observation unit for observing on whether recording of the information is conducted or not by the recording unit; a memory unit for memorizing information necessary for controlling the information recording apparatus; and a controller unit for controlling each constituent elements mentioned above, wherein the controller unit executes a control for reducing an electric power consumption of the information recording apparatus, by the power-saving controller unit, when determining that: the control of the face detection unit is valid from the face detection setup information obtaining unit; face detection is not made on the face of the person from the face detection observation unit; and recording of the information is not made from the recording observation unit.