Black Level; Sensor Input Clock; Image Flip/Mirror - Point Grey Gazelle GZL-CL-22C5M-C Technical Reference

Point Grey Gazelle Technical Reference
6.3

Black Level

Brightness, also known as offset or black level, controls the level of black in an image.
Black level is a digital value added to the existing pixel value after analog to digital conversion.
Black Level (Brightness)
Name
Black Level
Black Level Minimum
Black Level
Maximum
6.4

Sensor Input Clock

The sensor input clock controls the rate at which pixel data is acquired by the imaging sensor. In full 8-tap configuration,
the input clock runs at a default rate of 40 MHz. You can configure the sensor input clock to run at 35 MHz, 30 MHz, 20
MHz, or 10 MHz. Configuring the sensor input clock at any other setting is not supported. Exposure and frame rate are
affected by the pixel clock, so slowing the pixel clock is an alternative way to regulate these properties.
In base 2-tap configuration, the input clock runs at a default rate of 10 MHz, and 20 MHz in
Binningmode. Setting the pixel clock speed at any other rate in base configuration is not supported.
Sensor Input Clock
Name
Device Clock
Frequency
6.5

Image Flip/Mirror

The camera supports reverse imaging, otherwise known as image mirroring or image flipping. When images are
reversed, pixel values are flipped along the x (horizontal) center axis of the image, y (vertical) center axis, or both.
Reverse imaging is compatible with regions of interest (ROIs) (see
Image Flipping
Name
Reverse Image
Revised 10/31/2013
Copyright ©2011-2013 Point Grey Research Inc.
Description
Gets or sets the sensor black level
Gets the minimum sensor black
level
Gets the maximum sensor black
level
Description
Gets or sets the frequency of the sensor input
Clock, in hertz
Description
Flips the image horizontally,
vertically, or both
Read
blraw value
value is in raw (non-absolute) terms, between 0-
blraw
950
The default setting is 10.
blraw gmin
blraw gmax
Read
dcf
Specifying Regions of
Read
ri value
value is one of the following:
0—Images are vertically reflected along the y center axis
ri 1—Images are vertically and horizontally reflected along both the
x and y axes
2—Original image orientation (default)
3—Images are horizontally reflected along the x center axis
6 Imaging Parameters
Write
Sensor Mode Pixel
Write
dcf value
value can be 40, 35, 30, 20, or 10MHz for 8-
tap mode
10 MHz for 2-tap mode
Interest).
Write
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