User`s manual

Preliminary
Genie Monochrome Series-GigE Vision Camera Glossary of Terms • 113
NIC
Network Interface Card/Controller. For the Genie products the NIC must be a Gigabit
Ethernet interface to provide sufficient bandwidth.
Pixel
A contraction of "picture element". The number of pixels describes the number of digital
samples taken of the analog video signal. The number of pixels per video line by the number
of active video lines describes the acquisition image resolution. The binary size of each pixel
(e.g., 8-bits, 16-bits, 24-bits) defines the number of gray levels or colors possible for each
pixel.
PRNU
Photo-Response Non-Uniformity. For a given even illumination the difference between the
minimum and maximum measured pixel values is the PRNU.
Progressive Scan Camera
The progressive scan format outputs data from the camera (the signal) in sequential order as it
is scanned. The scan format produces a full frame of video in a continuous stream, rather than
half the image per output sequence in standard interlaced cameras.
Random Noise
Random noise is defined as the difference in peak to peak value for any single pixel
repetitively sampled, with the sensor in darkness. For digital cameras the measurement is
based on at least 512 samples from any pixel.
Router
A Router device forwards packets across networks. It operates at Layer 3 of the seven-layer
OSI model. Note that broadcast packets (such as GigE Vision Device Discovery message) do
not cross routers.
SAT
Saturation Output Amplitude. SAT is the average maximum output level for a specified light
input.
Scatter Gather
Host system memory allocated for frame buffers is virtually contiguous but physically
scattered throughout all available memory.
SNR
Signal to Noise Ratio. SNR measures the ratio between random noise and an arbitrary
reference signal on the transmission path or within a device.
Subnet
The subnet is identified by performing the logical AND of the IP address with its subnet
mask.