Camera Light Source Control via Image Reference Comparison
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Solution Overview
Problem
In camera apparatuses for image surveillance, existing light source control methods often result in unnecessary power consumption as all light sources are turned on, even if some are misaligned and provide no light compensation, affecting image capturing.
Innovation Solution
A method where image capturers capture uncompensated and practical images when light sources are turned on and off, respectively, allowing a processor to compare image reference values to determine the light compensation effect of each source, enabling precise control of light source activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If all light sources are turned on to provide sufficient compensation illumination, then image capturing quality is improved, but power consumption increases
Solution Approach 1:
The patent divides the light source control into individual segments by testing each light source separately. The processor controls light sources to be turned on and off in sequence, evaluating the light compensation effect of each individual light source on image capturers, then determines the on/off state of each light source independently based on test results, rather than controlling all light sources uniformly.
Solution Approach 2:
The patent applies local quality by matching specific light sources to specific image capturers based on their spatial relationships. The system evaluates the light compensation effect locally for each light source-image capturer pair, and the processor determines the on/off state of each light source according to the actual needs of corresponding image capturers, ensuring light sources are activated only where needed.
2Illumination intensity
If all light sources are turned on to ensure adequate illumination, then image capturing in dark environments is improved, but device complexity increases
Solution Approach 1:
The patent implements preliminary action by performing light source evaluation before actual image capturing. The system pre-tests each light source by turning them on in sequence and evaluating their light compensation effects on image capturers, storing the results. When image capturing is needed, the processor directly uses the pre-evaluated information to determine which light sources to activate, avoiding complex real-time decision-making.
3Area of stationary object
If misaligned light sources are turned on, then illumination coverage is maximized, but light compensation efficiency decreases
Solution Approach 1:
The patent implements feedback by using image capturers to capture test images under different light source conditions, then using the processor to analyze these images and evaluate the light compensation effect. The system feeds back this evaluation information to determine the on/off state of light sources, creating a closed-loop control system that continuously optimizes light source activation based on actual compensation effectiveness rather than just geometric coverage.
Data Source
AI summary
A light source control method is applied to a camera apparatus including a device body, a plurality of image capturers movably disposed on the device body, and a plurality of light sources disposed around the device body. The light source control method includes each image capturer capturing an uncompensated image toward a target region respectively when each light source is turned off, turning on the plurality of light sources by turns, each image capturer capturing a practical image toward the target region when each light source is turned on by turns, and comparing image reference values of the practical images captured by the plurality of image capturers when each light source is turned on by turns with image reference values of the corresponding uncompensated images respectively for controlling turning on or off of each light source respectively.