Partial scan – Unibrain 780 User Manual
Page 49
Unibrain Fire-i 580/780/785/980 Operation Manual
Page 43
4.2.
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 IIDC1.32 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)
0 - 7
8 – 15
16 – 23
24 - 31
Left
Top
0 - 7
8 – 15
16 – 23
24 - 31
Width
Height
Initial Values
System Dependant
Read Values
Last Update Value
Write Effect
Stored