CHEETAH Hardware User’s Manual
Imperx, Inc.
Rev. 1.6
6421 Congress Ave.
8/26/2016
Boca Raton, FL 33487
+1 (561) 989-0006
91 of 121
Pixel Clock Rate
– The Pixel Clock Rate determines the
Line Readout Rate. Decreasing the Pixel Clock Rate will
increase the time to readout a line.
Zero-ROT
- Unchecking Zero-ROT control increases the
line readout time by one micro-second. As a general rule, the
user should always enable Zero-ROT (checked) unless
prompted by the camera to uncheck it.
4.7.1.2 Area of Interest (AOI)
AOI is used to select the area of the image sensor which will
be output to the user. The user can chose to output the entire
image sensor field of view or any region within this field of
view.
Figure 43:
AOI Functions
Full Frame:
This is a pre-programmed AOI providing the full
resolution of the camera.
QFHD:
This is a pre-programmed AOI providing a Quad Full HD
(3840 x 2160) centered within the field of view
.
Custom:
The user can enter the desired area of interest by setting the
active window size (Width, Height) and offset (X, Y). Image
location (1, 1) is top left corner. The user can set the desired window
size by inputting the numbers directly or use the scroll controls.
Horizontal offset and width values must be a multiple of 8.
4.7.1.3 Subsampling and Averaging
Subsampling and Averaging functions are active within the defined AOI and
is used to reduce the output resolution while maintaining the desired field of
view. See Figure 44.
Figure 44:
Subsampling Functions