Camera requirements
To ensure quality video surveillance and proper analytics operation, it is necessary to choose the right video camera for specific installation conditions. We recommend familiarizing yourself with the minimum camera requirements presented below.
Main parameters
Matrix type | CMOS |
Matrix size | No less than 1/3" |
Construction
Presence of illumination* | From 10 meters, if there is no permanent lighting, depending on the required distance of scene lighting. |
*To operate the video camera in low-light areas, built-in illumination is installed in the surveillance cameras, most often IR illumination.
Matrix
Illumination in color mode | 0.09 lux or lower |
Min. illumination in black and white mode | 0 lux (IR on) |
Lens
Lens aperture (F-number)* | No more than 2.0 |
*The lens aperture in this case is conveyed using the aperture number (F-number) is the denominator value of the maximum relative aperture of the lens. The smaller this number, the wider the relative aperture opens, and the more light can enter the digital camera matrix. The maximum aperture opening depends on the lens construction, so the F-number often denotes lens aperture.
Image processing
Video image enhancement technologies | WDR* (hardware), 3D DNR*, BLC* |
*WDR is the Wide Dynamic Range technology, which provides an extension of the dynamic range through various technical tricks. In WDR mode, the camera provides a clear distinguishable image even in bright contrasting lighting.
*DNR is the digital noise reduction function. There are technologies for processing a single frame (2D) and processing a sequence of frames (3D), the latter gives better results.
*BLC is the technology for detecting and compensating (by increasing the signal level) for counter-lighting (background illumination).
Sound processing
Built-in microphone | Necessary for "Loud sound detection" analytics |
Video stream processing
Stream resolution | 1280 x 720 pixels or higher |
Video image frame transmission rate | 12 frames per second or higher |
Data transmission bitrate of the first stream | 1024 Kbps or higher |
Video stream type | CBR and/or VBR and/or MBR |
Video image encoding protocol | H.264, H.265 |
Video image transmission protocol | RTSP over TCP |
The required camera resolution and frame rate depend on specific usage conditions, video analytics type, and are considered individually for each specific use case.