Piranha 3 User Manual
Teledyne DALSA
03-032-10216-06
33
3.3.3 Setting a Pretrigger
Pu rp ose:
Som e fram egrabbers requ ire a sm all am ou nt of tim e (several
p ixels) to acqu ire d ata from a cam era. Pretrigger allow s the
fram egrabber set u p tim e by send ing the LVAL signal high several
p ixels earlier than valid d ata.
Syntax:
spt
i
Syntax Elem ents:
i
Pretrigger in a range from
0
to
16
.
3.4 Data Processing
3.4.1 Setting a Region of Interest (ROI:setting)
Pu rp ose:
Sets the p ixel range u sed to collect the end -of-line statistics and sets
the region of p ixels u sed in the
ccg
,
cao
,
gl
,
gla
,
ccf
,
ccp
, and
cpa
com m and s.
In m ost ap p lications, the field of view exceed s the requ ired object
size and these extraneou s areas shou ld be ignored . It is
recom m end ed that you set the region of interest a few p ixels insid e
the actu al u seable im age.
Syntax:
roi
x1 y1 x2 y2
Syntax Elem ents:
x1
Pixel start nu m ber. Mu st be less than the p ixel end nu m ber in a
range from
1
to
sensor resolution
.
y1
Colu m n start nu m ber. Since the Piranha 3 is a line scan cam era,
this valu e m u st be
1
.
x2
Pixel end nu m ber. Mu st be greater than or equ al to the p ixel
start nu m ber in a range from
2
to
sensor resolution
.
y2
Colu m n end nu m ber. Since the Piranha 3 is a line scan cam era,
this valu e m u st be
1
.
N otes:
To retu rn the cu rrent region of interest, u se the com m and s
gcp
or
get
roi
.
Related Com m and s
ccg
,
cao
,
gl
,
gla
,
ccf
,
ccp
,
els
Exam p le:
roi 10 1 50 1
3.4.2 Analog and Digital Signal Processing Chain
Processing Chain Overview and Description
The following diagram shows a simplified block diagram of the camera’s analog and
d igital p rocessing chain. The analog p rocessing chain begins w ith an analog gain
All manuals and user guides at all-guides.com
