Performance
193
Alvium CSI-2 Cameras User Guide V2.6.2
Image transfer with rolling shutter cameras
Affected models:
Alvium 1500 C-210m/c, C-500m/c, 1800 C-1240m/c,
and
1800 C-2050m/c
If acquisition is started and stopped in a short sequence, no image is transferred to
the host. The duration cannot be predicted, because it depends on various factors.
Frame rate jitter
Affected models:
Alvium 1500
C-120m/c, C-210m/c, C-500m/c, 1800 C-1240m/c,
and
1800 C-2050m/c
Generally, some parameters can be changed during exposure without affecting the
timing. When the camera is operated in freerun mode, changing parameters
during exposure leads to a frame rate jitter.
When parameters are entered, the next frame starts only after readout and sensor
reconfiguration delay are finished. When the camera is run in
Exposure Auto
mode, the actual frame rate is less than the calculated value for the corresponding
exposure time. Consider frame rate jitter for your application, including a gap
between
Exposure Active
signals.
Control value changes on a streaming camera
Only some controls can be adjusted while the camera is streaming, these include:
This list is not complete and will be updated in future document versions.
Figure 83: Delayed exposure due to parameter changes
Black Level
Gain
OffsetY
Exposure Auto
Gain Auto
White Balance Auto
Exposure Time
OffsetX
Latencies
Consider that value changes become effective with latencies based on the sensor
and its operation mode (triggered or free run, frame rate).
džƉŽƐƵƌĞĐƟǀĞ
ZĞĂĚŽƵƚĐƟǀĞ
džƉŽƐƵƌĞĐƟǀĞ
New parameters
ZĞĐŽŶĮŐƵƌĂƟŽŶĚĞůĂLJ
ŶƚĞƌŝŶŐŶĞǁƉĂƌĂŵĞƚĞƌƐ͗
ZĞĂĚŽƵƚĐƟǀĞ
