Lighting Control Module for Night Surveillance Image Clarity
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Solution Overview
Problem
Near infrared surveillance cameras often capture images with insufficient contrast and unclear features due to issues with brightness and depth of focus, making it difficult to recognize subjects in low-light environments.
Innovation Solution
A lighting control module that periodically adjusts the brightness of light emitted by a light emitting module connected to the camera, allowing the camera to capture clear images of objects at different depths of focus by varying the intensity of the light from strong to weak or weak to strong within a light emitting period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a near infrared camera is used to capture images in low-light environments, then the camera can operate in night or dark places, but the captured images have insufficient contrast and unclear features
Solution Approach 1:
The patent applies periodic action by controlling the light emitting module to periodically change brightness between first and second brightness levels. This periodic brightness variation allows the camera to capture multiple images at different brightness levels, and through image fusion technology, generate a final image with both high contrast and clear features, resolving the contradiction between sufficient illumination and image clarity.
2Illumination intensity
If constant brightness light is emitted to illuminate the scene, then the overall visibility is maintained, but objects at different depths cannot be captured with equal clarity
Solution Approach 1:
The patent applies dynamics by making the light brightness variable rather than constant. The light emitting module dynamically adjusts between first brightness (for distant objects) and second brightness (for close objects) in a periodic manner. This dynamic brightness adjustment enables the system to capture objects at different depths of focus effectively, improving adaptability across varying scene depths while maintaining overall visibility.
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
Enhances image clarity and recognition rates in night security surveillance by ensuring clear images are acquired across varying distances, improving the overall effectiveness of the camera's image acquisition capabilities.
Implementation Method 1
The wavelength of the near infrared is about in the range 700 to 4,000 nm. Through the sensing of image in the near infrared wavelength range, the near infrared camera can generate clearer image in the night or in the dark place.
Data Source
AI summary
The present invention provides a lighting control module, a video camera comprising the same and a control method of the same. The video camera of the invention includes a sensing module, a light-emitting module and a control module. The sensing module receives a reflected light beam from a recording direction of the video camera, and generates an image of a scene in the recording direction. The light-emitting module emits a light toward the recording direction. Additionally, the lighting control module is connected to the light-emitting module for controlling the light-emitting module to periodically emit the light from a first brightness to a second brightness.