Full Binning; Partial Scan - Imi Tech PEARL IMB-20FT User's Operation Manual

PEARL SERIES Operation Manual
5.1.3.

Full Binning

Full binning mode can be obtained by combining both vertical and horizontal binning. First horizontal pixels are
combined; followed by a vertical conjunction of these pixels. This would increase light sensitivity by a factor of 4 in
the case of 2 x 2 ( Horizontal x Vertical ) binning. However as described above, only vertical binning would result
in a speed gain while horizontal binning gives no speed gain. Thus, the speed gain result is similar to vertical
binning. Resolution in this mode would be reduced both horizontally and vertically.
5.2.

Partial Scan

Cameras provide a certain resolution which is dictated by the image sensor. Often, a certain region may be of
interest to the user. Partial scan mode provides the function to capture a certain region of interest (ROI) which
can provide an advantage in data transfer speed, resulting in a faster operation. As described in binning mode, the
speed gain would occur only if vertical resolution decreases. Partial Scan is only supported in Format 7 by setting
the following registers described in the IIDC1.31 specification. Unit size of the partial scan is described in the
camera specification, which the user must consider in setting the increment configuration.
IMAGE POSITION & IMAGE SIZE register
Left = Hposunit * n1
Top = Vposunit * m1
Width = Hunit * n2
Height = Vunit * m2
Left + Width < = Hmax
Top + Height < = Vmax
(n1,n2, m1, m2 are integer)
P i o n e e r i n D i g i t a l V i s i o n T e c h n o l o g y
2x2 Full Binning
Example
0 - 7 8 – 15
Left
0 - 7 8 – 15
Width
Initial Values System Dependant
Read Values Last Update Value
Write Effect Stored
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Top
16 – 23 24 - 31
Height