What Is An AHD Camera?
AHD is an analog high definition closed-circuit television video surveillance technology. It uses the same coax cable as traditional analog CCTV systems.
AHD cameras do not require a network connection and are less expensive than IP cameras and recorders. They are perfect for upgrading your existing system or new installation.
High Definition
HD (High Definition) refers to a video image resolution that is higher than standard definition, usually 720p (1280×720 pixels) or 1080p (1920×1080 pixels). The advantage of using an HD camera is the improved image quality when viewing on a monitor or ahd camera recording in a DVR. The enhanced image clarity provides more vibrant colors and more details that are easier to see.
The HD Series cameras include mouse control software built into the camera that allows you to view in real time, save images and record videos directly to an SD card without a computer connection. The software also lets you choose an on-screen display mode to suit the specific application you are working in. Depending on the model, additional advanced features are available including WIDE DYNAMIC RANGE, BLC and DIGITAL NOISE REDUCTION.
Unlike IP cameras, AHD can transmit high-definition video over existing coaxial cable up to 500 meters with no loss of signal strength. AHD works well with any existing TVI, CVBS or 960H analog surveillance system and makes upgrading to HD easy.
Wide Dynamic Range
Wide Dynamic Range (WDR) is a technology that adjusts the camera’s image when there are very bright and dark areas in the same picture. This helps the camera balance the extremes and provide a clear image. This is far more advanced than Basic Light Compensation (BLC), which doesn’t deal with such dramatic differences in lighting and tends to wash out the foreground while leaving the background blurry.
In addition to enhancing the image, WDR also makes it easier for the camera to handle glare. This can be caused by reflections from the sun or any other light source. Whether you’re dealing with sunlight coming through windows or just the normal glare of cars, boats or houses, a WDR camera will be able to handle these situations without producing an overexposed image.
This feature is especially useful in parking lots and other outdoor areas where there may be a lot of sunlight reflecting off vehicles, buildings and other objects. You’ll also be able to use this feature for surveillance cameras that are located near banks or ATMs, where robbery and other fraudulent activities can occur.
For these reasons, we recommend choosing a camera with this feature. You can find several options that come with this technology, including high-resolution models. Be sure to compare the features to ensure that you’re getting a good value.
Night Vision
The world is a different place at night. Whether you’re hunting, fishing, camping or just watching the stars and moonlight, night vision devices are useful tools to have. These devices use a special image intensifier tube to magnify any ambient light and emit a greenish image. They are often used by hunters, military, law enforcement and others to help them see animals or objects in the dark.
Depending on the device, the IR illuminator can be turned off or on by the user, using a separate switch for this purpose. Some models also allow you to control the intensity of the IR beam, with some offering a choice between broad field illumination and narrower one. Some models also have indicator lights to show the status of the IR illuminator and the main power, with a green LED for the former and a red LED for the latter.
Digital night vision offers the best price-performance for a high quality image, and works on the same principle as your day time cameras. The digital night vision uses a CCD to process the image before sending it to the LCD screen. Digital night vision is sensitive to light and can be damaged by sunlight or headlights of cars, so it’s important to shield it from direct exposure.
Motion Detection
Motion detection is one of the most important features a Smart WiFi Camera homeowner can add to their security camera system. It allows a camera to only record or send an alert when something moves in its field of vision, and saves energy by not recording continuously.
Most motion detector cameras use passive infrared (PIR) technology to detect movement. This sensor looks for objects that have a different temperature from the surrounding environment, such as humans and animals. A PIR sensor will detect a change in the amount of heat being emitted by those objects, which then triggers the camera to start recording or send an alert.
Some motion sensor cameras are also able to differentiate between people and vehicles, which helps to reduce unnecessary alerts. You can also choose a level of sensitivity to determine how much movement triggers the camera. You can even adjust the sensitivity to only detect large movements, such as cars or trucks.
Most motion-sensing cameras work with a smartphone app, which allows you to keep an eye on your property even when you aren’t at home. You can receive instant notifications when the camera is triggered, and you can also choose to turn off motion alerts or set up Smart Alerts (which allow you to opt for person, vehicle, or package alerts). Some things that can trigger a camera’s motion sensor include bright flashes of white light, such as when sunlight hits a window or mirror.
