Basic Operation & Standard Features
BASLER A102
f 3-19
DRAFT
3.6 Area of Interest (AOI)
The area of interest (AOI) feature allows you to specify a portion of the CCD array and during
operation, only the pixel information from the specified portion of the array is transmitted out of the
camera.
The area of interest is referenced to the top left corner of the CCD array. The top left corner is
designated as column 0 and row 0 as shown in Figure 3-10.
The location and size of the area of interest is defined by declaring a left-most column, a width, a
top row and a height. For example, suppose that you specify the left column as 10, the width as
16, the top row as 4 and the height as 10. The area of the array that is bounded by these settings
is shown in Figure 3-10.
The camera will only transmit pixel data from within the area defined by your settings. Information
from the pixels outside of the area of interest is discarded.
Figure 3-10: Area of Interest
The AOI feature is enabled by setting the camera to operate in Format 7, Mode 0. This is
accomplished by setting the Format field of the Current Video Format control register (see page
4-16) to 7 and the Mode field of the Current Video Mode control register to 0.
The location of the area of interest is defined by setting a value for the Left field and a value for
the Top field of the Image Position control register for Format 7, Mode 0 (see page 4-28). The size
of the area of interest is defined by setting a value for the Width field and a value for the Height
field of the Image Size control register for Format 7, Mode 0.
To use the entire CCD array in the A102
f monochrome cameras, set the value for Left to 0, the
value for Top to 0, the value for Width to 1392 and the value for Height to 1040.
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