SVS-Vistek EXO Series, Руководство пользователя

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SVS-VISTEK
Glossary of Terms 137
Gamma correction is a nonlinear operation used to code and decode
luminance values in video or still image systems.
Provides a generic programming interface for all kinds of cameras and
devices. Regardless what interface technology is used (GigE Vision, USB3
Vision, CoaXPress, Camera Link, etc.) or which features are implemented,
the application programming interface (API) will always be the same.
GigE Vision is an interface standard introduced in 2006 for high-
performance industrial cameras. It provides a framework for transmitting
high-speed video and related control data over Gigabit Ethernet networks.
Graphics Processing Unit of a computer.
Cable connectors commonly used for power, triggers, I/Os and strobe lights
see Gain.
In computer networking, jumbo frames are Ethernet frames with more than
1500 bytes of payload. Conventionally, jumbo frames can carry up to 9000
bytes of payload. Some Gigabit Ethernet switches and Gigabit Ethernet
network interface cards do not support jumbo frames.
Mechanical interface/connection for attaching lenses to the camera.
Multicast (one-to-many or many-to-many distribution) is an ethernet group
communication where information is addressed to a group of destination
computers simultaneously. Multicast should not be confused with physical
layer point-to-multipoint communication.
Pulse width modulation. Keeping voltage at the same level while limiting
current flow by switching on an off at a very high frequency.
A method for reading out fewer lines from the sensor, but “skipping” lines
above and below the desired area. Typically applied to CCD sensors.
In most CMOS image sensors an AOI (area of interest) or ROI (region of
interest) can be defined by selecting the area to be read. This leads to
increased frame rate.
The base clock (beat) that operates the sensor chip is. It is typically also the
clock with which pixels are presented at the output node of the image
sensor.
A camera RAW image file contains minimally processed data from the
image sensor. It is referred as raw in its meaning. SVS-VISTEK plays out
RAW only.
Read-Out control defines a delay between exposure and image readout. It
allows the user to program a delay value (time) for the readout from the
sensor. It is useful for preventing CPU overload when handling very large
images or managing several cameras on a limited Ethernet connection.
Shading manifests itself a decreasing brightness towards the edges of the
image or a brightness variation from one side of the image to the other.
Shading can be caused by non-uniform illumination, non-uniform camera
sensitivity, vignetting of the lens, or even dirt and dust on glass surfaces
(lens).
An in-camera algorithm for real time correction of shading. It typically
permits user configuration. By pointing at a known uniform evenly
illuminated surface it allows the microprocessor in the camera to create a
correction definition, subsequently applied to the image during readout.
Shutter is a device or technique that allows light to pass for a determined
period of time, exposing photographic film or a light-sensitive electronic
sensor to light in order to capture a permanent image of a scene.
Gamma
GenICam
GigE Vision
GPU
Hirose
ISO
Jumbo Frames
Mount
Multicast
PWM
Partial Scan
Pixel clock
RAW
Read-Out-Control
Shading
Shading correction
Shutter