Technology in ProductsNetwork Cameras
Using Optical, Communications and Video Content Analytics Technologies
to Supply Optimal Solutions
Canon's network cameras are used not only as security cameras, but also in social infrastructure applications, such as confirming traffic conditions or monitoring rivers. They also contribute to the automation of manufacturing facilities. They are also combined with AI-powered video content analytics technology to help alleviate crowds, assist with marketing and many other new solutions.
March 7, 2022
How network cameras work
Network cameras are cameras that are connected via the internet or other networks so that they can be operated remotely and used to confirm situations and conditions in real time. Like digital cameras, they comprise a lens, an image sensor, an image processor and a network engine that transmits video over the network.
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Technologies used in network cameras
Person detection technology
In order to accurately count the number of people in a crowd, from the input video, the person detection is made possible by using not only the face but also the different human models such as entire body, partially hidden body, etc. Additionally, a highly accurate person detection is realized using the edge characteristics describing the contour of the body and color characteristics differentiating objects looking like human body.
Real-time tracking technology
By anticipating the detected person’s movement, the person identification is performed only in the proximity of the predicted location. Simultaneous processing of person detection across the entire screen and tracking focused on the proximity of the predicted location enables both high processing speed and precision. This allows real-time processing of high-resolution video and of video showing the crowd of people.
Briefcam
Briefcam develops video content analytics software that enables viewing of several hours of recorded video in a matter of minutes. The software automatically extracts subjects to be checked and simultaneously displays events that happened at different times. Users can add various category and attribute conditions, such as color, size, speed, direction, trajectory, and stationary status, to objects in videos. This information can then be used to extract objects and events for checking. Briefcam technologies help significantly increase the efficiency with which video content analytics can be performed.
Hydrophilic coating technology
Clear video during and after the rain
Network cameras used outdoors are inevitably affected by water droplets in the rainy weather, as well as, dirt and dust. Water droplets and grime that accumulate on the surface of a camera lens can affect image quality and reduce visibility. Canon’s proprietary hydrophilic coating* prevents the degradation of visibility during and after the rain by quickly repelling raindrops in inclement weather and making the rain wash away any residue on the lens.
Preventing diffuse light reflections
Conventional network cameras tend to experience reduced visibility during rain due to droplets adhering to the lens surface and causing diffuse reflections. However, when rain hits a network camera treated with a hydrophilic coating, the droplets form a thin, uniform layer across the coated lens surface. This minimizes diffuse reflections, thus helping maintain visibility.
Rainwater forms a thin layer on the lens to wash away dust and dirt
When rain strikes the hydrophilic coating, it spreads out to form a thin layer beneath any dust or dirt. As the water flows away, it takes the dust and dirt with it.
- *Hydrophilic materials possess an affinity for water. A surface with high hydrophilicity causes water to spread over the surface as a thin, even layer instead of making droplets.
