Embedded vision systems encompass a vast array of applications, each presenting unique challenges and requirements. Among these, the demand for reliable performance in low-light environments is particularly pervasive. Whether it’s monitoring traffic flow on dimly lit roads, or ensuring security in nighttime surveillance, conventional cameras often struggle to provide adequate visibility.
In response to this challenge, Near Infrared (NIR) cameras emerge as indispensable tools. They offer a solution that transcends the limitations of traditional imaging technology. These cameras unveil a hidden world – where human as well as conventional camera vision fails – by harnessing the invisible spectrum of near-infrared light.
In this article, we delve into the advantages of NIR cameras in low light settings. We will take a deep look into how these cameras enhance the performance of vision systems that operate at night.
What Are NIR Cameras?
Near Infrared (NIR) cameras are imaging devices designed to capture light that falls within the near-infrared spectrum. This spectrum lies just beyond the range of visible light with wavelengths ranging from 700 nanometers (nm) to 1400 nm.
These cameras have a high Quantum Efficiency (QE) value in the NIR spectrum (QE is a sensor parameter that is critical in helping maximize the effectiveness of capturing an image). This enables NIR cameras to overcome limitations posed by low-light conditions.
Some of the applications of NIR cameras in embedded vision include surveillance, automotive safety, agricultural monitoring, medical imaging, and scientific research. TechNexion offers a number of cameras with enhanced NIR sensitivity with excellent image processing capabilities. This makes them perfect for vision systems where light supply is inadequate.
We need to differentiate here between the normal capabilities of CMOS image sensors (enhanced IR sensitivity up to around 900-100nm) and cameras specifically designed for NIR (which we actually do not sell or have any plans to sell at the moment).
Examples of Near IR Cameras
TechNexion’s Near Infrared (NIR) cameras are designed specifically to meet the needs of diverse embedded vision applications. Here are two examples of the NIR cameras available from TechNexion:
VCI-AR0522-CB
The TechNexion VCI-AR0522-CB is a high-performance NIR camera featuring onsemi AR0522 5MP rolling shutter sensor. This camera excels in capturing high-quality images in both visible and near-infrared spectra. This makes it ideal for low-light and night vision applications.
It is equipped with a C-Mount interchangeable lens, providing flexibility and adaptability for choosing the lens of your choice. Other features of the VCI-AR0522-CB include:
- USB-C compatibility, allowing for easy integration and data transfer.
- Rugged design, ensuring durability and reliable performance in demanding environments.
- Low power consumption, making it an energy-efficient choice for continuous operation.
AR0521 QE Spectrum
AR0522 QE Spectrum
USB3 Type-C Aluminium Enclosed Camera with onsemi AR0522 5MP Rolling Shutter with Onboard ISP + IR-Cut Filter + Incl. 1 Meter USB C Cable with C Mount Body
VCI-AR0522-CB
- onsemi AR0522 5MP Rolling Shutter Sensor
- Near Infra-Red Enhancement for Outdoor Applications
- Designed for Low Light Applications
- C-Mount for Interchangeable Lenses
- UVC USB Type-C 5 Gbps Connector
- Plug & Play with Windows & Linux OS
- VizionViewer™ configuration utility
- VizionSDK for custom development
VCI-AR0822-CB
The TechNexion VCI-AR0822-CB is another high-performance camera, featuring the onsemi AR0822 8MP rolling shutter sensor. This camera is designed to capture high-resolution images in both visible and near-infrared spectra. This makes it suitable for applications that require detailed imaging in low-light conditions. It also comes with:
- 4K HDR Imaging capabilities.
- C-Mount interchangeable lenses for versatility in various imaging setups.
- USB-C compatibility for easy connection and data transfer.
- Plug & Play with Windows & Linux OS
- Energy-efficient design for prolonged use in continuous operation scenarios.
AR0821 QE Spectrum
AR0822 QE Spectrum
USB3 Type-C Aluminium Enclosed Camera with onsemi AR0822 8MP 4K Rolling Shutter with Onboard ISP + IR-Cut Filter + Incl. 1 Meter USB C Cable with C Mount Body
VCI-AR0822-CB
- onsemi AR0822 8MP Rolling Shutter Sensor
- 4K HDR Imaging Capabilities
- Near Infra-Red Enhancement for Outdoor Applications
- Designed for Low Light Applications
- C-Mount for Interchangeable Lenses
- UVC USB Type-C 5 Gbps Connector
- Plug & Play with Windows & Linux OS
- VizionViewer™ configuration utility
- VizionSDK for custom development
Night Vision Applications and How NIR Cameras Enhance Them
Near Infrared (NIR) cameras have revolutionized various night vision applications by enabling high-quality imaging under low light or complete darkness. Here’s an in-depth look at how NIR cameras enhance each of these applications.
Smart Traffic Management
Efficient and smart traffic management is crucial for ensuring safety and reducing congestion, especially during nighttime when visibility is naturally low. NIR cameras, such as the TechNexion VCI-AR0822, play a pivotal role in this domain. This capability allows for clear imaging under very low light conditions, thereby ensuring effective traffic monitoring and management with the following advantages:
- Improved Vehicle Detection: NIR cameras can detect vehicles even in the absence of street lighting. This is essential for monitoring traffic flow, detecting violations, and managing traffic signals in real-time.
- Accident Prevention and Management: By providing continuous surveillance and clear imaging at night, NIR cameras help in quickly identifying accidents and dispatching emergency services promptly, thus reducing response times and potentially saving lives.
- Enhanced License Plate Recognition: NIR imaging ensures that license plates are clearly visible even at night, aiding in law enforcement and toll collection systems.
Also read: How Embedded Cameras are Powering New-age Smart Traffic Systems
Smart Surveillance
Surveillance is a critical component of security systems, and its importance magnifies at night when the risk of theft and intrusion increases. NIR cameras enhance smart surveillance systems by offering superior night vision capabilities. They offer the following advantages:
- Clear Imaging in Darkness: NIR cameras can capture high-quality images even in pitch-dark conditions, using an IR illuminator, which is invisible to the human eye. This makes them ideal for monitoring areas that are prone to criminal activities at night.
- Intrusion Detection: With the ability to detect movements and capture clear images under low light, NIR cameras help in identifying intrusions promptly. This allows security personnel to respond quickly to potential threats.
- Reduced Light Pollution: Unlike traditional floodlights, NIR cameras use IR LEDs as light sources, thereby reducing light pollution and maintaining a discreet surveillance setup.
Parking Lot Management
Managing parking lots autonomously efficiently at night can be challenging due to low visibility. NIR cameras provide a solution by enabling precise and clear imaging under low light conditions.
Guidance Systems: NIR cameras integrated with parking guidance systems can direct drivers to available spots even during the night, enhancing user convenience and reducing search times.
Security Monitoring: These cameras ensure that the parking areas are monitored continuously, deterring theft and vandalism by capturing clear footage of any suspicious activity.
Automated Systems: NIR cameras can be part of automated parking systems that handle vehicle entry, exit, and payment processes seamlessly, ensuring smooth operation around the clock.
A Smart Parking Lot
A Patrol Robot
Patrol Robots
In recent years, surveillance robots equipped with NIR cameras have become an integral part of perimeter security strategies. These robots can navigate and monitor large areas, providing enhanced security coverage.
Uninterrupted Patrols: NIR cameras enable patrol robots to operate effectively at night, ensuring continuous monitoring without the need for visible lighting.
Intruder Detection: With their ability to detect and capture clear images of intruders in low light, these robots can alert security personnel in real-time, allowing for immediate response.
Versatile Deployment: Whether it’s an industrial site, a commercial complex, or a residential community, patrol robots with NIR cameras can be deployed in various environments to enhance security.
Patient Monitoring
In healthcare, continuous patient monitoring is essential, particularly in intensive care units (ICUs) and during night shifts. NIR cameras offer significant benefits for patient monitoring by providing clear imaging without disturbing the patient.
Non-Intrusive Monitoring: NIR cameras can monitor patients without the need for bright lights, ensuring that patients are not disturbed during rest.
Detection of Vital Signs: Advanced NIR cameras can be used to monitor vital signs such as heart rate and respiration by detecting subtle changes in the patient’s skin tone and movements, which are visible in the NIR spectrum.
Enhanced Night Vision: Healthcare providers can keep an eye on patients throughout the night, ensuring that any signs of distress or medical emergencies are detected promptly and addressed immediately.
Remote Wildlife Monitoring
Remote wildlife monitoring is essential for studying animal behavior, tracking populations, and conserving endangered species without disturbing their natural habitats. Traditional monitoring methods often fall short at night or in low-light conditions, where visibility is limited. Near Infrared (NIR) cameras provide a solution by capturing high-quality images and videos in the NIR spectrum.
Enhanced Night Vision: NIR cameras capture clear and detailed images in low-light or complete darkness. This capability is crucial for monitoring nocturnal animals and those active during dawn and dusk.
Minimal Disturbance: NIR cameras operate without emitting visible light, which can startle or alter the behavior of animals. This allows for the continuous and natural observation of nocturnal and diurnal species alike.
TechNexion – Near IR Cameras for Modern Vision Applications
TechNexion offers Near Infrared (NIR) cameras tailored for diverse domains including retail, medical, and industrial environments. Featuring high Quantum Efficiency (QE) in the NIR spectrum, they excel in low-light conditions. These cameras are equipped with essential features for night vision applications, including IP-rated enclosures and compatibility with IR cut filters.
Whether for monitoring wildlife remotely, enhancing medical imaging, or optimizing traffic management, TechNexion’s NIR cameras provide reliable and versatile solutions for various applications.
Get in touch with us to explore how our NIR cameras can elevate your vision needs.
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