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4 Recording with the TS3
4-1 Setting Frame Rate and Resolution
Frame rate and resolution a
r
e set together as they are interacti
v
e. The maximum frame rate of
the camera is based on its resolution as seen in
“Table 4-1: Frame Rates and Resolutions
, below.
Scale and Resolution/Frame Rate
Selecting the p
r
oper resolution and f
r
ame rate for a given high-speed event is important. It is
based on the Field of View (FOV) required to get a good image of your object of interest and the
speed at which the object will move through that FOV.
For example, if you wish to image an automobile travelling at 50 mph across an intersection, full
resolution and a
r
elati
v
ely slow frame rate will work because your field of vi
e
w (FOV) will be large
and the car will not be moving through it very quickly.
Imaging a bird travelling at the same speed will require a much smaller FOV as the bird is 1/20th the
size of the car. If you wish to use the same scale (object size/FOV), the FOV becomes 1/20th the size
and the bird moves through it 20x as fast.
If you got acceptable imaging of an auto at 60FPS, it may take 1250FPS to get similarly acceptable
imaging of a bird at moving the same speed.
Aliasing and Frame Rate
If you are imaging a motion th
a
t is cyclical in nature like a wheel spinning or a lever moving up and
down, it is important to use a high enough frame rate to avoid motion aliasing. If
y
ou know the
speed of the object, use a frame rate at least a few times as
f
ast as the repetition
r
ate to get a
valid characterization of the motion. If
y
ou don’t know the speed, use as high a frame rate as
possible to start with and adjust from there. (Be sure to analyze the movement one frame at a
time as the
playback speed may cause aliasing as well.)
Generally you will choose to use the largest resolution possible
f
or the frame rate required. This
will give you the best definition of
y
our object of interest. Smaller resolutions m
a
y be desired in
order to increase the record time.
Frame Rates
60
125
250
500
1000 1250 2000 4000 5600
Resolutions
1280 x 1024
X
X
X
X
1024 x 1024
X
X
X
X
1280 x 720
X
X
X
X
1024 x 600
X
X
X
X
X
800 x 600
X
X
X
X
X
X
800 x 480
X
X
X
X
X
X
640 x 480
X
X
X
X
X
X
1280 x 256
X
X
X
X
X
X
X
512 x 512
X
X
X
X
X
X
X
320 x 240
X
X
X
X
X
X
X
X
X
320 x 200
X
X
X
X
X
X
X
X
X
200 x 200
X
X
X
X
X
X
X
X
X
Table 4-1:
Frame Rates and Resolutions
T3 User Manual
Содержание eosens TS3
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