Thermal Imaging vs. Vision Cameras
CCTV cameras are installed for security concerns. For a superficial scrutiny, a normal CCTV camera is fine, but if you require the perfect footage with good quality video, then you need to use advanced cameras. There are places that need to be scrutinized round the clock and require the perfect recordings even in extreme weather conditions like snow, rain, fog and dim light. In such cases, it is important to make use of either thermal imaging or vision cameras depending upon the conditions.
Let us compare the two of these and see which is better.
The traditional Night Vision Devices or NVDs, as they are referred to, use an optics-based system to pick up the traces of ambient light. Then, this light gets filtered through an image intensifier tube, which amplifies it and allows the things that are otherwise imperceptible to the human eye to be visible.
These cameras, on the other hand, make use of thermal energy that is emitted from an object. They can be called sensors that detect heat.
All the objects release thermal or heat energy, which produces high-end infrared light. As the human eyes are not capable of viewing this infrared light, the object remains invisible. The thermal cameras can see minute differences in heat and represent it as an image on the screen with enough precision.
For the night vision cameras to work, some amount of light needs to be present. This is because they amplify the ambient light and only then the things become visible to human eyes. Thus, in the complete absence of light or in conditions such as fog and mist these cameras are not very useful. In both extremely low visibility and low light situations, night vision cannot be used.
Thermal imaging cameras, on the other hand, can be used in all weather conditions. The highly advanced algorithms are used in the thermal camera chips, which are capable of turning the thermal energy readings into a visible image. Then, this gets displayed on a digital screen.
Though none of the cameras is banned in US or anywhere else in the world, the advanced thermal imaging cameras are quite costly. Between the two of these cameras: thermal and night vision, thermal cameras can be used even in tricky and risky situations. Earlier, they were extensively used by military services for watching their bases and enemy movements. With the advancements in technology, it is accepted with open arms by the industry too.