The Calculation Of Aoi Size And Frame Rate; The Relationship Between Linepitch And Width - IAI AT-140GE User Manual

7.8. The calculation of AOI size and frame rate

The frame rate for an AOI setting is calculated by the following formula.
Frame rate (fps) = Horizontal frequency (21.938KHz) / Total lines
Total lines =  OB period +  Transition period before start line(L) +
Calculation example
Readout: 1/2 partial scan at the center (520L), Start line (261L), End line (780L)
OB period = 4L
Blank period =6L
Transition period before start line = (4+261-1) ÷3 +1= 88 + 1=89  89
Transition period after end line
Total lines = 4+89+520+88 +6 = 707
Frame rate = 21938/ 707 =31.03 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 ：24-4224 bytes
RGB10V1Packed：32-5632 bytes
RGB10V2Packed：32-5632 bytes
Note: If the minimum is 8 pixels and the output is RGB 8bit,
8 pixels x 3 bytes = 24 bytes
If the maximum is 1408 pixels and the output is RGB 8bit,
1408 pixels x 3 bytes = 4224 bytes.
As for LinePitch and Width, if one is changed, the other will also be changed.
The relationship between LinePitch and width is;
RGB8Packed ：Linepitch/3
RGB10V1Packed：Linepitch/4
RGB10V2Packed：Linepitch/4
As the width is changed, the output area will also be changed.
 Effective image period (L) +  Transition period after end line(L)
+  Blank period (L)
Where,
OB period = 4L (Fixed)
Blank period = 6L (Fixed)
Transition period before start line =
Transition period after end line
AT-140GE
=
= (1040-780+2) ÷ 3 =87.3  88
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