Image Area Of Interest (Aoi); Setting The Image Aoi - Basler Racer User Manual

AW00118508000
To remove e.g. the limits for the Gain parameter using direct register access:
Set the value of the Remove Param Limits Gain register to enabled.

For more information about direct register access, see Section 3.2 on
8.4

Image Area of Interest (AOI)

The image area of interest feature lets you specify a portion of the sensor line. During operation,
only the pixel information from the specified portion of the line is read out of the sensor and
transmitted from the camera to the frame grabber. One of the main advantages of the AOI feature
is that decreasing the size of the AOI will increase the camera's maximum allowed acquisition line
rate if it is limited by the time it takes to transmit the pixel data from the camera to the computer. For
more information about how changing the AOI size affects the maximum allowed line rate, see
Section 6.4 on page 87.
The area of interest is referenced to the left end of the sensor array. The outer left pixel is
designated as pixel 0 (see Fig. 33).
The location and size of the area of interest is defined by declaring an offset X and a width. For
example, suppose that you specify the offset X as 16 and the width as 24. The area of the array that
is defined by these settings is shown in Figure 33. With these settings, the camera will read out and
transmit pixel values for pixels 16 through 39..
0 1 2 3 4 5 6 9 10 11 12 13 14 15 16
Offset X in Pixels
Fig. 33: Image Area of Interest
8.4.1

Setting the Image AOI

By default, the AOI is set to use the full resolution of the camera's sensor. You can change the size
and the position of the AOI by changing the values of the camera's OffsetX and Width parameters.
When you are setting the camera's area of interest, you must follow these guidelines:
The sum of the Offset X setting plus the Width setting must not exceed the width of the

camera's sensor. For example, on the raL2048-80km, the sum of the Offset X setting plus the
Width setting must not exceed 2048.
Depending on the selected Camera Link tap geometry, the following increments apply to offset

X and width if horizontal binning is not enabled:
Basler racer Camera Link
17 18 19 20 21 22 23 24 25 26
Width in Pixels
= Pixels within the AOI
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