VC Camera Link series
Page 33 of 86
RA14-11A-010
8 Camera Features
8.1
Region Of Interest (ROI)
The Region of Interest (ROI) feature allows you to specify a portion of the sensor array. You can acquire only the
frame data from the specified portion of the sensor array while preserving the same quality as you acquire a
frame from the entire sensor array. ROI is determined as the overlapping area of two areas when designating
start point and end point in horizontal and vertical direction as shown in the figure below. Start point and End
point mean the starting and end of the ROI. In the VC-2MC, 4MC and 12MC models, the frame rate will increase
as the vertical ROI is made smaller. However, the horizontal ROI does not affect the frame rate. In the VC-3MC,
VC-25MC and VC-25MC2 models, the frame rate will increase as both the vertical and horizontal ROI are made
smaller.
Figure 8.1 ROI
In VC-2MC, the maximum frame rates depending on the changes of vertical ROI are shown in the table below.
ROI Size (H
×
V)
2 Tap
4 Tap
8 Tap
10 Tap
2048
×
16
3689.3 fps
6692.2 fps
10622.3 fps
12103.0 fps
2048
×
32
2094.4 fps
4036.9 fps
6979.1 fps
7960.3 fps
2048
×
64
1123.3 fps
2250.8 fps
4139.6 fps
4725.4 fps
2048
×
128
582.8 fps
1194.1 fps
2282.4 fps
2606.7 fps
2048
×
256
297.0 fps
615.9 fps
1203.0 fps
1374.3 fps
2048
×
512
149.9 fps
312.9 fps
618.2 fps
706.4 fps
2048
×
1024
75.3 fps
157.7 fps
313.5 fps
358.2 fps
Table 8.1 VC-2MC Maximum Frame Rate depending on ROI Size
Horizontal ROI
Vertical
ROI
Region Of
Interest
(0, VSIZE - 1)
H Start
H End
V Start
V End
(HSIZE - 1, VSIZE - 1)
(HSIZE - 1, 0)
(0, 0)
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