The Calculation Of Aoi Size And Frame Rate; The Relationship Between Linepitch And Width - IAI AT-200GE User Manual

7.8. The calculation of AOI size and frame rate

The frame rate in the AOI setting is calculated by the following formula.
Frame rate (fps) = Horizontal frequency(19.27KHz) / Total lines
Total lines =  OB period +  Transition period before start line(L) +
 Effective image period (L) +  Transition period after end line(L)
OB period = 4L (Fixed)
Transition period before start line = Round up (
Transition period after end line
Calculation example
Readout: 1/2 partial scan at the center (618L), Start line (310L), End line (927L)
OB period = 4L
Blank period =5L
Transition period before start line = (6+310-1) ÷9 +1= 35 + 1=36  36
Transition period after end line
Total lines = 4+36+618+35 +5 = 698
Frame rate = 19.27/ 698 =27.6 fps

7.9. The relationship between LinePitch and Width

The setting range of LinePitch is changed when the output is set at 8-bit or 10-bit.
LinePitch can be set as follows.
RGB8Packed ：24-4920
REB10V1Packed：32-6560
REB10V2Packed：32-6560
Note: The unit is byte.
If the minimum is 8 pixels and the output is RGB 8bit,
8 pixels x 3Byte =24Byte
If the maximum is 1640 pixels and the output is RGB 8bit,
1640 pixels x 3Byte = 4224Byte.
As for LinePitch and Width, if one is changed, the other will also be changed.
The relationship between LinPitch and width is;
RGB8Packed ：Linepitch/3
REB10V1Packed：Linepitch/4
REB10V2Packed：Linepitch/4
As the width is change, the output area will also be changed.
+  Blank period (L)
Where,
Blank period =5L (Fixed)
AT-200GE
= Round up (
= (1236-927+2) ÷ 9 =34.6  35
- 25 -
6+Start line−1
) + 1
9
1236−End line+2
)
9