Infrared Light

Myths About Video Surveillance Systems

Gone are the days when people were first dependent on people and the other machinery that promised security of life and property. With the improvement in technology, it is now seen that the criminals are using better methods to break through some secured areas. This is where one needs advanced security measures. You cannot just rely on the preventive security measures to protect life and property. You also need to keep some measures that will help you to track the criminals after the crime has been performed. This is when you might think of a Video Surveillance system.

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The fact that these systems have proved to be the best among all those that are used for the purpose of security, has brought about many companies working to improve the methods and machinery being used in them. Even though, everything looks promising and good enough, there are a few myths that have resulted in many people doubting the actual working of the security systems. A few myths and the respective facts are as mentioned below.

MYTH : Searching for the Footage is difficult.

FACT : There are a number of Video Surveillance systems that store the footage for future reference. It is true that it seems to be difficult to search a small clip from the entire footage that is being recorded since hours. But, technology has brought out a solution for this too. We can now use the date and time to search a particular clip within the entire video footage.

MYTH : You will never get the clarity in images and videos taken at night as compared to those taken in broad daylight.

FACT : You can avail night/ day cameras if you wish to capture images both; during the day and the night. A White Light Infrared Illuminator will help you get a clear image. The camera should be fixed with an infrared corrected lens that solves the problem of switching between the day and night modes.

MYTH : The IR Illuminators usually have a fixed range of illumination that needs to be compared to that of the camera before it is bought.

FACT : The Illumination distance of an Infrared Illuminator can be increased by simply increasing the output power of the light source. If you want to increase the distance twice, you need to increase the distance thrice, the output power should be increased nine times and so on.

It is therefore seen that nothing is possible in this advanced world of technology. One can surely make use of the advanced settings that most of these devices have, to make sure that they work well and give the expected output.

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Hyperspectral imaging with infrared Light

Hyperspectral imaging, which is a unique form of spectral imaging, collects information from the different electromagnetic spectrum and processes them. Just like human eyes can witness the visible light in three bands, namely, blue, red or green, spectral imaging divides the spectrum into many more bands. Hyperspectral imaging, which is also known as imaging spectroscopy, combines the power of spectroscopy and digital imaging. For each of the pixels that are available in an image, a hyperspectral camera acquires the radiance, (the intensity of the light) for a large number (it might vary from ten to hundreds) of contiguous spectral bands. Thus, each of the pixels contains a continuous spectrum (in radiance or reflectance) and therefore, can be used to characterize the objects in the scene with great detail and precision. Using this technology of hyperspectral imaging, different types of products have been manufactured, including IR light cameras, night vision cameras with IR spotlight, cameras compatible with illuminar IR etc.

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Use of IR light is an integral aspect in the manufacturing process of night vision cameras, as is hyperspectral imaging that allows you to capture images in dark and low light intensity with perfect accuracy and precision. These night vision security cameras, which are widely used both in businesses and individual houses, are extremely helpful for detecting any sort of unusual activities that are caused during the night. Hyperspectral images definitely provide much more detailed and accurate information about a particular scene than that of a normal color camera, which simply obtains just three different spectral channels that correspond to the primary visual colors, i.e. green, red and blue. Therefore, hyperspectral imaging creates an immensely improved ability, using which a camera can categorize the objects in the sight, depending on their spectral characteristics. The technology of sensor design and processing speed has advanced to a great extent recently, and this ensures that hyperspectral imaging can be used in a wide range of applications like military target detection, satellite based remote sensing etc.