CHEETAH Hardware User’s Manual
Imperx, Inc.
Rev 1.7
6421 Congress Ave.
8/26/2016
Boca Raton, FL 33487
+1 (561) 989-0006
38 of 121
Decimation:
The camera supports both sub-sampling and pixel averaging to reduce
the output resolution. Both pixel averaging and sub-sampling increase the image
sensor frame rate, however, sub-sampling decimation offers the largest frame rate
improvement by reducing the number of rows and columns readout from the image
sensor. Sub-sampling and pixel averaging decimation provide about a 2x to 3x
increase in frame rate.
Output Interface Bandwidth:
The bandwidth of the output interface can also
impact the maximum achievable frame rate. For example, with Camera Link Base (2
taps selected) and with 10-bit digitization and 10-bit output mode selected, the frame
rate is limited by the output interface bandwidth of 2.04 Gbps.
2.3.3.1 AOI Frame Rate Examples
The Tables below describe resulting frame rate (FR) for various AOIs using Camera
Link Deca output. The frame grabber speed will impact results and values below
assume an x8 speed frame grabber. The camera will calculate and display the actual
frame rate at any horizontal and vertical window selection.
Examples of C5180 Frame Rate performance at full resolution and within selected
AOIs are described in Table 18.
C5180 Frame
Rates (fps)
8-bit, CL 10-
taps (FPS)
Full Resolution
32
3840 x 2160
80
1920 x 1080
316
1280 x 720
570
Table 18:
C5180 AOI frame rate for various AOIs
Examples of C3880 frame rate performance at full resolution and within selected
AOIs for 8-bit digitization are described in Table 19.