Touch Display Screen Illumination for Facial Recognition in Low Light
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Solution Overview
Problem
In dark visual environments, the quality of facial information collected by facial information collection apparatuses is often unclear, affecting the success rate of face unlocking processes.
Innovation Solution
The method involves using a touch display screen and background images as auxiliary light sources, where the brightness of the background image and ambient light are adjusted to illuminate the user's face, with the processor controlling the display to ensure adequate illumination and improve image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If facial information collection is performed in dark visual environments using conventional methods, then the device can operate in low-light conditions, but the quality of collected facial information becomes unclear
Solution Approach 1:
The touch display screen performs multiple functions: it serves as both the user interface display and as an auxiliary light source for illuminating the user's face during facial information collection in dark environments, eliminating the need for separate lighting hardware
Solution Approach 2:
The system uses its own display components (touch display screen and background image) to provide illumination for facial collection, rather than requiring external lighting devices, making the system self-sufficient for low-light operation
2Illumination intensity
If the brightness of the touch display screen is increased to illuminate the user's face, then the illumination intensity improves, but the energy consumption increases
Solution Approach 1:
The system dynamically adjusts the brightness parameter of the background image based on ambient light conditions detected by the ambient light sensor, using mapping relations to optimize illumination while minimizing energy consumption
Solution Approach 2:
Instead of illuminating the entire display screen at high brightness, the system selectively increases brightness only in the background image area to provide sufficient illumination for facial collection while conserving energy
3Adaptability or versatility
If the ambient light sensor detects present ambient light to adjust display brightness, then the adaptability to different lighting conditions improves, but the device complexity increases
Solution Approach 1:
The ambient light sensor continuously monitors ambient light conditions and provides feedback to the processor, which automatically adjusts the background image brightness through pre-established mapping relations, creating a closed-loop adaptive system
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 enhances the quality of collected facial information, thereby improving the success rate of face unlocking in low-light conditions by utilizing the touch display screen and background images as light sources, ensuring proper illumination and image clarity.
Implementation Method 1
light emitted from the touch display screen and the background image is configured to illuminate a face of a user
Implementation Method 2
detecting the brightness of present ambient light within a predetermined space range by an ambient light sensor of the terminal device
Data Source
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AI summary
Embodiments of the present disclosure disclose a method for collecting facial information and related devices. The method includes: displaying (101) a background image on the touch display screen, in which a brightness of the background image is greater than or equal to a first brightness, and light emitted from the touch display screen and the background image is configured to illuminate a face of a user; and collecting (102, 405), by the facial information collection apparatus, the facial information of the user whose face is illuminated by the light emitted from the touch display screen and the background image. The quality of the collected facial information of the user may be improved by employing embodiments of the present disclosure.