Camera System Dynamic Light Adjustment for Glare Reduction
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Solution Overview
Problem
Conventional camera systems experience glare issues in low-light environments, particularly when capturing images of individuals wearing glasses, which affects accurate eye detection and recognition due to light reflections, leading to reduced accuracy in eye-related applications.
Innovation Solution
A camera system with an image sensor, light sources, and a processing unit that captures images, acquires reflection values, determines the relationship between light source luminance and reflection levels, and adjusts the luminous power of the light sources to minimize glare by dynamically configuring the luminance configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light source is used to illuminate the subject in low-light environments, then image capture capability is improved, but glare is generated on reflective surfaces such as glasses
Solution Approach 1:
The patent applies dynamics by making the light source adjustable in luminance level. The control unit dynamically adjusts the luminance of the light source based on detected reflection levels, transitioning from a static illumination system to a dynamic one that adapts to different reflective properties of subjects, thereby reducing glare while maintaining illumination capability.
Solution Approach 2:
The patent changes the luminance parameter of the light source to optimize performance. By adjusting the luminance level of the light source based on reflection values detected in captured images, the system finds an optimal parameter setting that provides sufficient illumination without causing excessive glare on reflective surfaces.
2Illumination intensity
If high luminance light sources are used to improve image brightness, then visibility is improved, but reflection levels on subjects increase causing glare
Solution Approach 1:
The patent implements feedback by using the control unit to detect reflection levels in captured images and use this information to adjust the luminance level of the light source. This closed-loop feedback mechanism allows the system to respond to actual reflection conditions and optimize illumination to minimize glare while maintaining image brightness.
Solution Approach 2:
The system adjusts the luminance parameter of the light source based on detected reflection levels. By changing the luminance parameter dynamically according to feedback from the image sensor, the system optimizes the balance between image brightness and reflection control.
3Illumination intensity
If the luminance level of light sources is increased to compensate for glare, then image brightness is maintained, but glare becomes more severe
Solution Approach 1:
The patent applies local quality by adjusting the luminance level of light sources individually or in specific groups based on the reflection characteristics of different regions in the image. Rather than uniformly increasing luminance across all light sources, the system selectively adjusts luminance where needed to maintain brightness while minimizing glare in specific areas.
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
The solution effectively reduces glare, enhancing the accuracy of eye detection and recognition by dynamically adjusting light source power based on reflection levels, even in scenarios where the camera system is positioned in areas prone to glare, and improves image quality and uniformity.
Implementation Method 1
glare in photos is caused by light bouncing off a reflective surface at an angle and into the camera
Implementation Method 2
the camera system may contain a illumination unit such as an infrared illuminator or to provide a light source or flashlight for illuminating the face
Data Source
AI summary
A camera system is provided. The camera system includes an image sensor, at least one light source, and a processing unit. The image sensor is configured to capture a plurality of images. The processing unit is configured to perform the following instructions. A plurality of reflection values on at least one subject in the captured images is acquired. A relationship between a luminance level of the light sources and a reflection level on the at least one subject is obtained. A luminance configuration is determined according to the relationship between the luminance level of the light sources and the reflection level on the at least one subject. A luminous power of at least one of the light sources is adjusted according to the luminance configuration.