CCD stands for charged-coupled device. CCD security cameras have great dynamic range (WDR), making them an excellent choice for low-light conditions. These cameras excel when it comes to producing the sharpest image in challenging lighting environments. Their disadvantage is higher price, high power consumption and heat output, and generally slower framerate (not as important for CCTV applications).

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Optical format

What is ONVIF? ONVIF is an acronym for Open Network Video Interface Forum. ONVIF was founded in 2008 by a... read more

Since the infrared spectrum is of lower energy than visible light, this limits the amount of solar energy that can be harnessed with standard photovoltaic cells.

Cameras work by focusing light through a lens onto an image sensor. An image sensor contains millions of light-sensitive spots which are used record the image seen through the lens. Therefore, a larger image sensor is able capture more information than a smaller one, resulting in a better image.

Just as you would choose a camera based on the number of megapixels, it is important to also consider the type of sensor used in the camera. A security camera with a larger sensor will be more expensive, but can produce sharper images in lower-lighting conditions. Always ensure you pick the best camera for location where it’s going to be installed.

Sensorformat

Around 50% of the Sun's energy to the Earth is in the form of infrared,[6] therefore the balance of this radiation in the atmosphere is crucial to keep a stable temperature and climate. Carbon dioxide in the atmosphere produces a greenhouse effect, because CO2 is able to absorb and re-emit infrared radiation as seen in Figure 2, unlike the gasses that make up most of the atmosphere (molecular oxygen, O2 about 21% and nitrogen, N2, about 78%).[7] This greenhouse effect is necessary for the livable temperatures on Earth, however an increasing level of greenhouse gases is contributing to an unstable warming of the Earth which is a cause for great concern. Read more about this imbalance here.

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Understanding CMOS imagesensor

Technology has changed the way we see home security. Until about 5 years ago, the home security industry was quite... read more

What the heck is a camera sensor anyways? If you’re reading this article, you probably already understand how camera resolution affects the image quality. What is less commonly understood however, is how camera image sensor size affects the final image quality. Today we’re going to explain exactly how image sensors work, and how that translates to what you see on the camera.

Typically, most security cameras use a sensor size of between 1/1.7” and 1/3”. The larger the sensor, the better the camera will perform in low-light scenarios. A larger sensor also results in a wider field of view (FOV), allowing the camera to see further in each direction. The trade-off is that larger sensors are more expensive to manufacture, increasing the final price of the camera.

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Infrared radiation (IR) is a type of radiant energy, with longer wavelengths than the visible light humans can see, but shorter wavelengths than radio waves. Its range extends from fairly small wavelengths near the color red, 700x10-9 m, to nearly a millimeter, 3x10-4 m.[2]

Camerasensor

At Gs Global Security, we are closely monitoring the COVID-19 situation and are putting in place measures to protect the... read more

CMOSsensor

Even though infrared radiation cannot be seen by the human eye, it can definitely be felt. Infrared energy is felt as heat because it interacts with molecules by exciting them, causing them to move faster which increases the internal temperature of the object absorbing the infrared energy. Although all wavelengths of radiant energy will heat surfaces that absorb them, infrared radiation is most common in daily life because of the "ordinary" objects that emit it as radiant heat (see blackbody radiation and Wien's Law for more information on this).[3] For example, humans at a temperature of 37°C[4] emit most of their radiant heat in the infrared range, as can be seen in Figure 1.

CMOS stands for complementary metal-oxide-semiconductor. They utilize progressive image scanning to obtain values for each pixel and display an image. This technology has the advantage with high resolution, fast frame rate, and low power consumption. The tradeoff is more noise, and less dynamic range.

Background Have you ever stopped to think about how exactly a camera is able to capture and display an image? Many... read more