Video Surveillance Camera Lenses(1,596)
March Networks’ new ME3 Pendant IR PTZ camera delivers uncompromising security for large indoor and outdoor spaces, as well as essential features to ensure high reliability, clear image capture and storage efficiency. Ideal for large-footprint environments such as parking lots, big box stores and transit stations, the camera incorporates electronic image stabilisation and HDR, so recorded video is always crisp. Universal Power over Ethernet (UPoE) ensures redundancy and zero downtime by switching to PoE when a camera loses power. And built-in PTZ auto-tracking uses motion detection to automatically track a person or object, keeping the image centered and in focus. Software updates are quick and easy to apply using the mass management feature available in Command Enterprise software, while PTZ-optimized motion histograms speed search capabilities. The 3MP PTZ includes a 40x zoom lens to capture objects 25% further away than industry-standard PTZs, and IR LEDs for uniform illumination in total darkness at a distance of more than 650 feet/200 metres. It also incorporates a Low Bit Rate compression mode to improve bandwidth and storage efficiency by as much as 50% when the camera is in its home position. The ME3 Pendant IR PTZ is protected by a weather-proof enclosure, and generates an alert in the event someone attempts to obstruct or move the camera. It comes with a variety of mounting options, including a 1.5” NPT wall mount and short pendant mount, both with back boxes.
Since 2011, the patented Dallmeier Panomera® multifocal sensor technology has provided comprehensive video protection for vast areas in many football stadiums, perimeters, airports and city areas all over the world. The new Panomera® series, the “Ultraline“, has exceptionally high effective resolution for these situations. Dallmeier presents the first model of the new series, the Panomera® S8 Ultraline, which delivers up to 190 megapixel at 30 fps. The Panomera® concept has revolutionized video technology: with up to eight sensors in a single camera, it is possible to capture enormous distances in unprecedented resolution quality. With fewer cameras and considerably less expense for both infrastructure and management, the total cost of ownership of video solutions are reduced significantly. At the same time, customer specifications regarding pixel density and coverage can be satisfied very precisely. Up To 26,000 sqm. Coverage With One Camera The first model of the new Ultraline series, the Ultraline S8, has an excellent dynamic range of 130 dB UWDR (effective) for an extreme Panomera® effect. This enables a resolution of 125 px/m up to a distance of 160, 104 or 82 m, enabling individuals to be recognized over the entire distance. Identification of persons (250 px/m) is supported up to a distance of 46 m depending on the model, observation (62 px/m) is possible even up to a distance of 322 m. This corresponds to a huge image space of more than 26,000 sqm. with continuous depth of field. Permanent Capture The multifocal sensor system captures and stores all regions of the image space in the highest detail resolution. At the same time, it is not important whether the operators are concentrating on a specific region in live mode (multiple detail zoom) or if regions of interest are displayed in detail based on video content analysis (multiple auto-tracking). The Panomera® recordings always include the entire area of interest and allow every operation to be analyzed. “Made in Germany” And GDPR-Ready Like all Dallmeier cameras the new Panomera® model is manufactured entirely in Germany, at the Dallmeier factory in Regensburg. This in itself is a major factor in the manufacturer’s data protection and data security strategy, since it is then impossible for unauthorized persons to gain access through “backdoors”, for example. In all, 14 functions such as the setup of private zones, People Masking or the very latest encryption-authentication technology in the processing chain of Dallmeier solutions ensure that the strict requirements of the GDPR relating to data protection and data security are met.
The Evolution ExD Cameras, part of Oncam’s Specialist Camera Range, are unique to the 360-degree video surveillance market. Both ATEX, IEC and IECEx certified, the 5MP and 12MP versions have been specifically designed to meet the needs of customers operating in hazardous environmental conditions and potentially explosive atmospheres. The cameras’ housings are manufactured in Stainless Steel 316L, for maximum robustness. The IP66, IP67 and IP68 ratings make the enclosure resistant to harsh environmental conditions. Fit for use in markets such as Offshore and Onshore Environments, Industrial and Chemical Plants, Ports and Marine Applications and Food Processing Areas, the world’s first and only 360-degree ExD camera range is available in four mounting options: Surface Mount, Wall Mount, Pole Mount and Ceiling Mount. With no moving parts, the cameras can be PoE, 12 VDC or mains powered, dependent on whether they will be used indoor, outdoor or in extreme outdoor conditions. A heater is also available in the outdoor models. For enhanced connectivity in extreme outdoor applications, single or multi-mode fibre versions are offered. Indoor: EVO-05-EIP / EVO-12-EIP (PoE) Outdoor: EVO-05-EOA / EVO-12-EOA (115V) EVO-05-EOE / EVO-12-EOE (230V) Extreme Outdoor: EVO-05-ESA / EVO-12-ESA (115V, Single Fibre Optic Mode) EVO-05-ESE / EVO-12-ESE 230V, Single Fibre Optic Mode) EVO-05-EMA / EVO-12-EMA (115V, Multi Fibre Optic Mode) EVO-05-EME / EVO-12-EME (230V, Multi Fibre Optic Mode)
VIVOTEK’s FE9391-EV is the next generation of market-leading 12-Megapixel 360° panomorph network camera, featuring a detailed 12-Megapixel CMOS sensor which guarantees superb image quality. Utilizing the latest in panomorph lens technology for 180° panoramic view (wall mount) or 360° surround view (ceiling/wall/floor mount) with zero blind spots, the camera is able to provide comprehensive coverage of open areas such as airports, shopping malls, parking lots, retail stores, offices and more. Removable IR-cut filter The FE9391-EV (IP66, IK10 rated) is the successor to FE8391-V in the VIVOTEK 360° surround view family. The new model is equipped with a removable IR-cut filter and WDR Enhancement technology, allowing the camera to maintain optimal image quality around the clock for unparalleled visibility under high-contrast lighting environments. 3D Noise Reduction technology enables the camera to capture clear, polished video under low-light conditions. The FE9391-EV's use of the latest in panomorph lens technology has led to much improved image quality with a huge drop in edge distortion. Latest In IR Illumination The FE9391-EV is also updated with the latest in IR illumination, VIVOTEK's Smart IR II technology with Adaptive IR. Adaptive IR enables the FE9391-EV's IR illuminators to adjust to the scene together or individually to provide the best possible IR image, reducing glaring hotspots and/or underexposed dark spots. Advanced Video Content Analysis The FE9391-EV is also be the first to include a new wave of advanced Video Content Analysis (VCA). Available in 4Q 2017, this includes better object detection in order to reduce false alarms. Through advanced Video Content Analysis functions including crowd detection features the FE9391-EV is the next steps in elevating surveillance cameras from image capturing devices to advanced notification instruments, allowing users to see more in smarter ways.
Ultra-narrow 1.7mm bezel-to bezel design(1.15mm bezel on the left and top sides and 0.55mm bezel on the right and bottom sides) High contrast and high brightness greatly enhance the video layering, and present the details of the video High fidelity digital processing for a brilliant and vivid video Built-in 3D COMB filter and 3D noise reduction Wide array of connectivity options HDMI, DVI, VGA, BNC, RS232, USB, Audio Infrared, RS232 double mode, supporting remote PC control Brightness smart detection, power-saving Professional thermal design to extend equipment lifespan Built-in power, low energy consumption, ultra-quiet Fast stack installation, professional project design, supporting arc-shaped mounting Widely used in surveillance center, dispatching platform, safe city, commercial display, etc.
AI series products adopt the most advanced AI technologies, including deep learning algorithms that primarily target people and vehicles, which provides higher flexibility and accuracy for end-users. This enables the Dahua AI series to offer various advanced applications such as Face Recognition, ANPR, Metadata, People Counting, traffic data statistics, etc. The complete line up of Dahua AI series includes network (PTZ) cameras, network video recorders, digital video recorders, servers, and platform management products. Beyond seeing the world, the power of AI allows devices to perceive the environment and understand the world in a better way. System Overview Dahua new XVR8000-4KL/4K-I series XVR delivers excellent performance and high recording quality that is ideally applicable to a wide range of industries ranging from retail to banking and real estate. Holding Dahua Technology’s patented HDCVI signature technology, these new AI XVR products are featured with long distance transmission, seamless upgrading, and IoT into analogue monitoring—all while maintaining perfect 4K resolution over coax. With build-in deep learning module, XVR8000-4KL/4K-I series products adopt video image structuring technology based on deep learning algorithms, achieving high-precision human face recognition and perimeter protection. By applying deep learning artificial intelligence, XVR8000-4KL/4K-I allows users to focus on what matters most, improves event response time and helps make video actionable. With its extensive portfolio of front-end and back-end products with HDCVI technology, Dahua solutions can be easily integrated into self-contained systems to satisfy the needs of both system integrators and users. Functions Perimeter Protection Automatically filtering out false alarms caused by animals, rustling leaves, bright lights, etc. Enables system to act secondary recognition for the targets. Improving alarm accuracy. Real Time Face Recognition Video stream real time face recognition. Facial attributes analysis features including gender, age, expression, glasses, moustache, mouth mask. Identify people and also capture, record faces with metadata. Facial feature filtering while real time display, only show faces with target features. Face Database Management Configurable multiple face databases. Powerful face database management. Face database can be applied to video channels independently. Name, gender, birthday, nationality, address, ID information can be added to each face picture. Common/Stranger Mode Supports regular and stranger mode. In stranger mode, when XVR detects a strange face(not in device's face database), it can trigger alarm, buzzer, snapshot, record, etc. Similarity threshold can be set manually. This function is developed for important infrastructure sites for which access control is critical. Smart Search Supports search by metadata of human face. Support uploading face pictures to XVR and compare them with recorded faces in XVR by similarity. Enable operators to quickly and easily search through multi channels and long duration, efficiently find out when and where a person of interest appeared.
The Contera NVR Appliance from Arecont Vision Costar is designed to offer powerful IP recording in an affordable, compact chassis. The Contera NVR Appliance is equipped with an on-board 8 or 16 channel PoE switch, that can be upgraded to 24 channels, allowing for Plug and Play connection with ConteraWS™ or ONVIF cameras. With full integration to ConteraWS Web Services, the Contera NVR Appliance offers centralized user management, single sign-on convenience, mobile apps and a web client that allows for easy remote connection to your recorders. Network setup is fast and easy using ConteraWS Web Services, and eliminates the need for port forwarding or DDNS. The Contera NVR Appliance runs on a secure Linux OS and comes preloaded with ConteraVMS™ Server software as a turnkey solution.
With 16ch perimeter protection, the XVR intelligently avoids false alarms to less important objects such as falling leaves and rain, and send alarms only when identifying human or vehicle. Face Recognition function enables alarm for suspects on blacklist, allowing passing for authorized people on whitelist, also alert for approaching of strangers. Besides, utilizing 4ch Metadata Search functions, the new XVR products are smart search enabled, capable of automatically extracting face feature attributes. Offering incomparable perimeter protection, face recognition and metadata search technology, Dahua AI XVR is applicable to a wide range of industries ranging from retail to banking and real estate.
The Avigilon H4 Multisensor camera combines self-learning video analytics with exceptional coverage, featuring 3 or 4 individually-configurable sensors that can be positioned to monitor virtually any area. With 9-32 MP total resolution, it delivers broad coverage and high image detail, and uses H.265 compression technology to reduce bandwidth and storage requirements while maintaining clear images. Each camera sensor incorporates Avigilon self-learning video analytics and works with Avigilon Appearance Search™ technology, our award-winning AI video search engine.
The Contera™ Outdoor Dome megapixel camera features 1080p and 5-megapixel (MP) resolution for optimum performance. The Contera Outdoor Dome combines a day/night mechanical IR cut filter with an integrated motorized remote focus and zoom precision iris (P-iris) lens for excellent, optimal image quality. Regardless of the time of day, the Contera Outdoor Dome is prepared for any lighting condition. For applications with poor lighting conditions, Enhanced WDR™ (wide dynamic range) at 120dB provides the best visual balance to shaded and bright light conditions. For clear color images in low-light, NightView™ offers strong low-light sensitivity for capturing details in extremely poor-lit scenes. Built-in Smart IR LED illumination automatically adjusts output in response to the distance of an object in view to prevent over-exposure when the object is very close to the camera. The Contera Outdoor Dome is ONVIF (Open Network Video Interface Forum) Profile S and G compliant, providing interoperability between network video products regardless of manufacturer.
The Evolution 180 Outdoor Camera is built upon Oncam’s expertise and heritage on 360-degree technology. It is specifically designed for applications that require a dewarped panoramic view of an outdoor scene, without blind spots, from a single sensor camera. The 12MP high-resolution sensor and the built-in 3D dewarped panoramic video provides industry leading Panoramic+ views. The true day/night functionality allows images to be produced in all lighting conditions, including additional IR lighting. The camera is IP66, IP67, IP68, IP69K and IK10+ rated, making it a robust design. Its versatile enclosure enables wall and pendant mounting, while the integrated adjustable mounting allows for an angling of up to 45°. When angled, Oncam’s Angle Compensation Technology (ACT) corrects the view, straightening vertical lines in the scene.
The Contera Bullet outdoor-ready megapixel camera features 1080p and 5-megapixel (MP) resolution for optimum performance. The Contera Bullet combines a day/night mechanical IR cut filter with an integrated motorized 2.7–12mm varifocal remote focus and zoom precision iris (P-iris) lens. Regardless of the time of day, the Contera Bullet is prepared for any lighting condition. For applications with poor lighting conditions, Enhanced WDR™ (wide dynamic range) at 120dB provides the best visual balance to shaded and bright light conditions. For clear colour images in low-light, NightView™ offers strong low-light sensitivity for capturing details in extremely poor-lit scenes, and is further enhanced by built-in Smart IR LED illumination that automatically adjusts output in response to the distance of an object in view to prevent over-exposure when the object is very close to the camera. The Contera Bullet is ONVIF (Open Network Video Interface Forum) Profile S and G compliant, providing interoperability between network video products regardless of manufacturer.
VIVOTEK’s IP9191-HT is a professional H.265 box network camera providing true 3840x2160 resolution at 30 fps. With ultra HD resolution, 30 frames per second, and VIVOTEK’s SNV and WDR Pro technologies, this camera is capable of delivering clear, detailed images in a variety of challenging applications such as city surveillance, transportation and industrial monitoring. VIVOTEK's in-house algorithm brings video compression to next level. With VIVOTEK’s Smart Stream III technology, the IP9191-HT is capable of delivering excellent images while keeping bandwidth and storage consumption at extremely low levels, even smaller than typical 2-Megapixel image size. The IP9191-HT is further equipped with an i-CS (intelligent-CS mount) lens with LSC (Lens Shading Correction) and LDC (Lens Distortion Correction) calibration functions to obtain even better images. When combined with remote focus system, these features enable installers to adjust zoom/focus remotely. These function-rich combinations make the IP9191-HT suitable for a wide range of video surveillance applications. When housed inside the AE Series Enclosures, the IP9191-HT is excellent for long-range outdoor applications. Furthermore, when equipped with the 12-50mm AL-248 lens, the IP9191-HT is an ideal camera that could deliver exceptional images even from surveillance targets that are over 100 meters away.
The Contera Bullet outdoor-ready megapixel camera features 1080p and 5-megapixel (MP) resolution for optimum performance. The Contera Bullet combines a day/night mechanical IR cut filter with an integrated motorized 2.7–12mm varifocal remote focus and zoom precision iris (P-iris) lens. Regardless of the time of day, the Contera Bullet is prepared for any lighting condition. For applications with poor lighting conditions, Enhanced WDR™ (wide dynamic range) at 120dB provides the best visual balance to shaded and bright light conditions. For clear color images in low-light, NightView™ offers strong low-light sensitivity for capturing details in extremely poor-lit scenes, and is further enhanced by built-in Smart IR LED illumination that automatically adjusts output in response to the distance of an object in view to prevent over-exposure when the object is very close to the camera. The Contera Bullet is ONVIF (Open Network Video Interface Forum) Profile S and G compliant, providing interoperability between network video products regardless of manufacturer.
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According to IHS Market, it is estimated that there are over 60 million security cameras in the United States, and other reports say these cameras capture more than four billion hours of footage per week. Over the last decade, IP camera technology has dominated the conversation as it has provided users with a broad offering of enhanced image quality and features. With a large percentage of existing security systems relying on analog, many end users looking for high definition (HD) video quality have been forced to take on a complete system overhaul. Infrastructure Overhaul For HD Video To make the switch, customers would need to change everything, from cameras to hardware to wiring– not to mention the lengthy installation process that would ensue. IP cameras also require higher Internet speeds and more cloud space. Whether constrained by budget, bandwidth or storage, many end users have been unable to adopt this new video surveillance method.Thanks to technological advancements within the security industry, HD over Coax offers a viable solution for integrators and end users alike Thanks to technological advancements within the security industry, HD over Coax offers a viable solution for integrators and end users alike. By utilising the current Coaxial cables, this offering yields high definition video, while requiring minimal infrastructure changes and is an optimal surveillance choice for security customers. Plus, with new advancements and updates being made frequently to this technology, there is a solution for every security need. The enhanced alternative of HD over Coax has been warmly welcomed in the security industry, thanks to its simple solutions and ever-evolving features. Many new analog HD cameras are “plug and play,” able to connect directly to existing Coaxial cables. This eliminates the need for a complete system change, creating cost-savings for the end user and an enhanced video quality offering. Easy Solutions For HD Video As a result, integrators can cost-effectively upgrade their customer’s surveillance solution while using their legacy infrastructure, making it an attractive option for end users and an easy sell for dealers. Latency in video is another common issue with network-based camera systems, where even the slightest delay in video surveillance can hinder security response HD over Coax cameras themselves are always expanding and evolving to meet a wide array of security needs. With the introduction of fisheye and multi-sensor cameras, users now have a multitude of coverage options, not to mention the introduction of 4K bringing resolution options to the same level as IP. Some newer technologies are even touting 4K cameras paired with 4K digital video recorders (DVRs) made specifically for analog systems. Longer cables grant transmission for up to 1600 feet, double the distance of standard analog solutions, and triple that of IP systems. This single cable is able to transmit both HD video and audio. Recently, broadcast quality audio over Coax has become available in limited models, a substantial improvement over older analog technology, which was unable to transmit audio. Stopping Video Delay Latency in video is another common issue with network-based camera systems. Even the slightest delay in video surveillance can hinder security response. IP cameras are forced to compress and packetize their video for transmission. The outcome of this is a reduced number of images per video, which in turn causes delay. HD over Coax on the other hand, delivers an unlimited amount of HD images in real time, with smooth motion and impressive clarity. Additionally, the point-to-point transmission delivers uncompressed video free of lag. Another touted benefit is that, unlike IP networked cameras, analog systems provide a more secure video transmission. With so much sensitive information housed on a businesses’ network, adding another point of network access through an IP camera can create concerns for cyber security risks. HD over Coax delivers an unlimited amount of HD images in real time, with smooth motion and impressive clarity Preventing Network Hacking With HD over Coax, the physical connections between the camera and DVR prevent network hacking. By keeping the video surveillance system offline, security professionals are able to direct their attention to the physical threats at hand, rather than having to focus on deterring cyber security risks. One of the primary difficulties of deploying HD video solutions is the fact that many older systems utilize a wide variety of HD standards and platforms. To make matters more complicated, after HD over Coax was brought to market, manufacturers raced to create their own version of this technology. Today, the most popular proprietary standards are HD-CVI, HD-TVI and AHD. However, integrators and customers found that attempting to manage multiple HD technologies proved to be near impossible.Integrators and customers found that attempting to manage multiple HD technologies proved to be near impossible Diversifying Surveillance Through One DVR To combat these issues, manufacturers have introduced products with more flexibility to their portfolios. One example of this is the penta-brid DVR which grants the ability to seamlessly integrate multiple technologies deployed across one application. This means that systems with diverse camera brands and technologies, such as a mix of HD-CVI, HD-TVI, AHD, analog or IP, can be connected through one DVR. For many end users with legacy analog systems, penta-brid DVRs give them greater freedom to choose between a variety of solutions, rather than being limited to one option. With video resolution increasing, the space needed to store the footage is similarly rising. Penta-brid technology has been able to adapt to these evolving needs, giving users ample storage space to house the HD and 4K surveillance video with some of the newest models including H.265 compression. HD Casino Surveillance Made Simple For casinos, HD images are critical for identifying unauthorized personnel and unlawful behaviours to create a safe environment for guests and staff While HD over Coax is beneficial to many end users and integrators, those in the casino and hospitality markets find it crucial. With a combination of high profile guests, large amounts of cash on hand, constant crowds and strict industry regulations, reliable video surveillance is a must. Deploying new IP systems comes at a stiff price. When looking to upgrade their video surveillance, casinos must also be mindful of the installation process. When moving to an IP-based system, ripping out old wires and replacing them with new is the standard practice. This practice can be both disruptive and costly, not to mention gaming regulations require casino activities be monitored at all times so a complete system shutdown would result in revenue loss. This cost can be hard to justify, especially when the current legacy analog system remains in working condition with only the lower image resolution to date it. For these scenarios, the most cost-effective option is to leverage the legacy infrastructure, replace the existing cameras with new devices, and reap the benefits that HD video has to offer without any lapse in security. For casinos, HD images are critical for identifying unauthorized personnel and unlawful behaviours to create a safe environment for guests and staff. HD over Coax cameras now offer the same resolution as IP cameras with a plug and play approach, that cuts down on expense without sacrificing quality. For businesses and applications that are unable to adopt IP technology, whether it be cost or time prohibitive, HD over Coax now features most of the same benefits IP has to offer without breaking the bank. By providing clear images in real time, maximizing existing infrastructure, and affording cyber security benefits, HD over Coax provides an attractive solution for many end users and integrators.
When people think of control rooms, images from James Bond movies or intense action stories come to mind. What they fail to realise is the incredible level of ergonomics, technology, precision and craftsmanship required to create a top-notch command and control room. “These are rooms of complex functionalities, where hundreds of elements must be integrated and function in sync,” says Jim Coleman, National Sales Manager, AFC Industries. Professional teams from several different industries must coordinate every single detail in order to ensure that functionality occurs each and every time. Reconfigurable Furniture For Control Rooms AFC Industries is one company that specialises in equipping control rooms for security and other applications. AFC Industries was established in 1994 as a family-owned business that focuses on the design and construction of ergonomic products. Their height-adjustable units guarantee the right height for standing desks as well as traditional sitting levels. The company produces an array of Command and Control ergonomic security consoles and mounting solutions. Modular racking systems facilitate efficient storage of electronic and audio-visual equipment. As technology changes, older traditional consoles are no longer a necessity. Many organizations instead are choosing to use lighter, less costly, reconfigurable furniture that allows more flexibility. Command Centers need to be able to reconfigure the space at will. Because most systems are housed in secure data centers, users should be able to quickly move their positions by relocating their workstations, utilising different network connections. Simple control room features, like those addressing lighting or operator comfort, can make the difference in a correct or incorrect decision during a crisis Emergency Operations Centers A positive trend driving the market for control rooms is an increase in emergency operations centers (EOCs), says Randy Smith, President of Winsted. “Everybody is concerned about what happens in an emergency,” says Smith, and the centers are popping up as a tool for emergency preparedness. It’s another environment where sit-stand work stations are the rule. Winsted’s product lines include stock modular and customized elements in good-better-best categories – from basic to lots of “bells and whistles;” jobs can be configured from modular elements or customized as needed. Customized Control Rooms For Seamless Operation There is a lot at stake in control room design: Lives can depend on how effectively a control room functions in an emergency. Control rooms should seamlessly accommodate both everyday occurrences and crisis situations, says Matko Papic, Chief Technology Officer of Evans Consoles. Better-operating control rooms can increase efficiency and reduce and/or mitigate risk. Simple control room features, like those addressing lighting or operator comfort, can make the difference in a correct or incorrect decision during a crisis. Addressing operator comfort can reduce the possibility of workers’ compensation claims. End users are seeing multiple benefits of creating a better operating environment, better sightlines, more comfort and attention to ergonomics. As a fully integrated control room solutions provider, Evans Consoles approaches the needs of a control room environment beginning in the conceptual/operational planning stage. They consider broad issues such as how information will be processed, the interface between technology and operators, and the cognitive and physical interactions of operators – understanding that these factors drive the layout and function of control rooms. After analyzing tasks to be performed in the environment, Evans lays out the consoles to meet those needs. Rather than a predesigned solution, each installation is tailored around a specific application. Read part 2 of our Control Rooms series here
Many end-users shell out the cash to acquire the newest high-end devices, plug in, and expect to be wowed A well-developed surveillance system can give a single security guard the power to see what otherwise might take a hundred pairs of eyes to see. But what happens when all the components are all connected and powered up, and the resulting image on the screen is, well, indiscernible, or, at the very least, terribly pixelated? Many end-users shell out the cash to acquire the newest high-end devices, plug in, and expect to be wowed. Often enough, however, what they see on the screen is not what they were expecting – and they wonder what they just paid for. In a good high-definition system, what factors actually create the best image quality? With so many variables involved, from the camera’s lens to the imaging algorithms to the monitor resolution – just to name the obvious ones – how do system integrators achieve the best on-screen images? The Lens The first component to handle light from an object, this may be the one most taken for granted in cameras of any sort. (Just try scratching or cracking one and you’ll agree.) In the days of analog cameras, it seemed that any old lens would do just fine. However, as the technology inside cameras evolved and more powerful sensors (more pixels) became available, engineers and programmers demanded more from lenses. Moreover, intelligent video content analyses would be impossible without high-accuracy lenses.In what way do lenses impact the image quality? The key factor here is light transmission. The quality of light passing through the lens itself will forever be critical to the quality of image reproduced. A lens made using ultra-precision molding aspherical technology achieves more accurate color, better light, and clearer images. Multilayer broadband anti-reflection coating further maximises a lens's light transmission while minimizing the residual reflection of light on the surface of each optical lens. Variables involved include the camera’s lens, the imaging algorithms and the monitor resolution When it comes to fabricating a megapixel lens that hits the mark, the materials used and the processes by which lenses are produced are the two most critical criteria. The materials most often used to create lenses are glass and specialized plastics. An HD lens made of ultra-low-dispersion optical glass – which, by using dispersion characteristics that are different from those of conventional optical glass – will deliver better HD performance. Machine-automated lens production using specialized plastics results in high output for camera producers, and the lenses produced are more uniform in design and quality. For an HD vari-focal lens, its image quality depends largely on the precision of the cam. The cam rotates to drive the zoom and focus lens groups forward and backward for a smooth continuity of focal length and adjustment of the focal point. A lack of precision with the cam inevitably causes an offset or tilt of the lens' optical axis during zooming and focusing, leading to a serious loss of image quality. Lens production is a delicate balancing act. The slightest errors or imperfections will be very noticeable when tested Lens production is a delicate balancing act. The slightest errors or imperfections will be very noticeable when tested. The features of a lens that affect image resolution, clarity, and contrast must be perfect. Achieving uniformity of image resolution at the center and the edges of a lens requires high-precision machinery. And once a lens has been properly crafted, the assembly of the camera, the lens housing materials, and the alignment of the optical axis demand utmost accuracy. To put it mildly, quality control must be rigorous. Image Signal Processing As light passes through the lens, the sensor captures it and converts it to data. Raw RGB data is transmitted by the camera sensor and undergoes Image Signal Processing (ISP) such as noise reduction, white balance, WDR, curve correction and color correction, etc. The data is then transformed to true colors for each pixel point, for people to see images that look “normal” to the human eye. It is the Image Signal Processing that defines the final image quality on the screen. Collecting data in different conditions is vital, for instance, outdoor data should be analyzed with natural light on days with sun, overcast, rain, and fog, at dawn, at dusk, and so on. Similarly, when using cameras equipped with infrared sensors, testing the IR light signals in various conditions is necessary as well. Actual image performance depends upon variables such as low light illumination, signal to noise ratio, dynamic range of light, and more. ISP algorithms aim at increasing the signal data and decreasing noise. Cameras with Wide Dynamic Range (WDR) will yield improved video imaging with both background and foreground objects in high contrast or high-backlight environments, maximising the amount of detail in brighter and darker areas in one field-of-view. In scenes with low contrast and low light, the sensors deliver digital image signals and at the same time send some amount of digital noise that directly hinders image clarity. Three-dimensional digital noise reduction (3D DNR) removes unwanted artifacts from an image, reducing graininess. Where cloudy weather poses a challenge, auto-defogging technology helps to identify the density of fog or rain with gray-white color ratio analysis, and imbues images with true color reproduction. Ramping up the megapixels and frame rates yields great video, but also results in more bandwidth used and more storage occupied Matching Megapixels To Image Quality When the factors mentioned above line up well, correlating cameras and monitors creates the best viewing experience. When a high definition camera is in place, a monitor with a high resolution will display images much more clearly. But if the monitor’s resolution is low, it will not deliver the high-quality images expected – or possible – from that HD camera. For an 8 MP camera, for instance, users do best to apply monitors with 4K × 2K resolution. Though common sense, this deserves to be mentioned because users might decide to upgrade their systems with 4K monitors, but with perhaps 1.3 MP cameras installed. In such a scenario, there’s no guarantee the on-screen image quality will automatically improve. Managing Data And Bandwidth In terms of a complete, high definition surveillance system, when the right factors come together and the calibrations are set, image quality – even in a standard HD 1080p setup – can be extremely good. The final piece of the puzzle is managing the data. Ramping up the megapixels and frame rates yields great video, but also results in more bandwidth used and more storage occupied. Squeezing bandwidth threatens image quality and clarity, but keeping ample room for signal transmission and storage will eventually increase the overall cost for customers. Is it possible for integrators to optimize their customer’s system and, at the same time, stay within budget constraints? Luckily, it can be done. Squeezing bandwidth threatens image quality and clarity, but keeping ample room for signal transmission and storage increases the overall cost for customers To do this, a more efficient video encoding solution would allow an improvement in compression efficiency of 40–50% over H.264. Improvements to algorithms that are adaptive to a particular scene give users control over bitrate. Another option would be to start recording video only when an event triggers an alarm, since most security guards are primarily concerned with moving objects rather than a scene’s generally stagnant background. This intelligently helps optimize bandwidth and storage consumption. Another method is to use a single panoramic or fisheye camera in place of several HD cameras for coverage – the reduced number of security devices will reduce bandwidth demands and the rate of storage consumption as well. Getting The Best Image Quality Now let’s put this all together. Naturally, integrators and users will refer to their product specs to understand features and functions, fine-tuning each component for best results. Also, as suggested above, users should select an HD camera comprehensively in terms of lens performance, pixels, image quality, and overall system compatibility and performance. Next, matching the backend device and management platform should be carefully considered in a complete security system. Installing equipment that has been engineered for a given scene is a must, along with strategising how to get the most coverage out of the lowest number of cameras. Finally, product quality, warranty, price, and on-going customer service are all important factors that customers should take into account as well.
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