Basler Vision Technologies Sprint Series, Руководство пользователя

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Exposure Start and Exposure Time Control
Basler sprint Mono Cameras 77
4.3.1 Max Segment AOI Pixels
Each sensor line in a camera is divided into segments with each segment including 2048 pixels.
In cameras equipped with sensors that have 2048 pixels per line, each line has only one segment.
In cameras equipped with sensors that have 4096 pixels per line, each line has two segments as
shown in Figure 32.
In cameras equipped with sensors that have 8192 pixels per line, each line has four segments.
Fig. 32: Segments in Each Line of a 4096 Pixel Sensor
When you are setting up the area of interest (AOI, see Section 6.2 on page 118 ) on a camera with
only one segment in each line, all of the pixels included in the AOI will fall into that single segment.
On these cameras, the Max Seg AOI Pixels is simply the number of pixels included in the AOI. For
example, if the AOI starting pixel is set to 33 and the AOI length is set to 512 on an spL2048-39km,
the Max Seg AOI Pixels will be 512.
When you are setting up the AOI on a camera with two segments (4096 pixels) in each line, the
pixels within the AOI may all fall into one segment. Or, the AOI could be positioned so that some of
the pixels in the AOI fall into segment 1 and some of the pixels in the AOI fall into segment 2. The
Max Seg AOI Pixels is defined as the number of AOI pixels included in the segment that contains
the largest number of AOI pixels.
When you are setting up the AOI on a camera with four segments (8192 pixels) in each line, the
pixels within the AOI may all fall into one segment. Or, the AOI could be positioned so that some of
the pixels in the AOI fall into one segment and some of the pixels in the AOI fall into a neighboring
segment. The Max Seg AOI Pixels is defined as the number of AOI pixels included in the segment
that contains the largest number of AOI pixels. Or, the AOI could be positioned so that the pixels in
the AOI fall into three or four segments. In this case, at least one complete segment will be part of
the AOI and therefore the Max Seg AOI Pixels will be 2048.
Consider some examples:
„
Suppose that the AOI is set to use the entire line of a 4k camera, i.e., the AOI starting pixel is 1
and the AOI length is 4096. With these settings, the number of AOI pixels in segment 1 is 2048
and the number of AOI pixels in segment 2 is 2048. The Max Seg AOI would be 2048. (In any
case where the number of AOI pixels that falls into each segment is the same, the Max Seg
AOI Pixels is simply the number of AOI pixels included in one of the segments).
„
Suppose that the AOI starting pixel is set to 1 and the AOI length is set to 256. With these
settings, all 256 pixels in the AOI would fall into segment 1. The number of AOI pixels in
segment 1 is 256 and the number in segment 2 is 0. So the Max Seg AOI Pixels would be 256.
„
Suppose that for a 4k camera, the AOI starting pixel is set for 1985 and the length is set for
256. With these settings, the AOI falls across the two sensor segments as shown in Figure 33.
Segment 1 Segment 2
Pixel 1 Pixel 2048 Pixel 2049 Pixel 4096