Photon Focus MV2-D1280-640, Руководство пользователя, Страница: 38 / 85

4 Functionality
Parameter Value
t
exp
10
µ
s - 1.04 s
t
CLK
15.15 ns
P
Y
Window H
Table 4.4: Camera specific values for frame time calculations
A calculator for calculating the maximum frame rate is available in the support
area of the Photonfocus website (www.photonfocus.com).
4.5.2 Multiple Regions of Interest (MROI)
The MV-D1280-640 camera series can handle up to 16 different regions of interest. This feature
can be used to reduce the image data and increase the frame rate. An application example for
using multiple regions of interest (MROI) is a laser triangulation system with several laser lines.
The multiple ROIs are joined together and form a single image, which is transferred to the
frame grabber.
An ROI is defined by its starting value in y-direction and its height. Every ROI within a MROI
must be of the same width. The maximum frame rate in MROI mode depends on the number
of rows being read out. Overlapping ROIs are not allowed. See Section 4.5.1 for information
on the calculation of the maximum frame rate.
Figure 4.21: Multiple Regions of Interest with 5 ROIs
4.5.3 Decimation
Decimation reduces the number of pixels in y-direction. Decimation can also be used together
with ROI . Decimation in y-direction transfers every n
th
row only and directly results in reduced
read-out time and higher frame rate respectively.
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