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Reference Manual ATOM one SSM500
processor will be shown on all channels and the playback video image processor is being
bypassed (see the orange arrows in the above diagram).
Please note the following differences and dependencies between the live and playback
chain:
•
The white balance settings (R/G/B gains) of the live chain are applied in the “Global
Image Processing” module, that means its’ settings also impact the playback chain
as they influence the data before it is being recorded. Changing the R/G/B gains of
the live chain after the recording was stopped will not effect the playback.
•
The white balance settings in the playback chain can be used to fine tune the white
balance during playback. By default they are set to neutral so that the playback
chain has the same look as the live chain.
•
The defect pixel correction happens in the “Global Image Processing” module and
always effects both chains.
•
When being executed on the playback chain, the
wb_preset
command will set the
white balance gains back to neutral, but it will apply the color correction matrix and
offsets associated with that preset (see
wb_preset
command).
2.1.1
Recording System
The recording system of the SSM500 consists of two high speed solid state drives (SSDs).
These drives have a limited lifetime, that means they can only be rewritten certain times
before failing. To ensure longevity of the SSM500 system, high endurance drives intended
for professional use have been selected. These drives have a write endurance of at least
2400 hours or 100 days of continuous recording at 500 frames per second. For an average
recording time of 3 hours per day, 7 days a week that translates into a lifetime of over 2
years.
You can monitor the state of the SSDs using the
health
command. If this command reports
any errors, or the video output shows image artifacts, please run a self test of the
recording system using the
selftest
command. Afterwards contact the Dream Chip
technical support so that the drives can be checked and replaced.
For more details please see the
health
and
selftest
command descriptions in chapter 8.
2.1.2
Workflow Details
This chapter is intended as a guideline on how to use the ATOM one SSM500 in a
production environment.
Note on Color Calibration and the White Balance:
To simplify the workflow the camera stores the currently configured white balance preset of
(see
wb_preset
command) and the currently configured white balance gains (see
gain_red / gain_green / gain_blue
commands) of the live chain in the recording meta
data, when a recording is started with the
rec
command. When the recording is played
back with the
play
command these settings are restored automatically.
Caution:
If the preset is changed during the recording these changes will not be updated
in the meta data, you have to select the correct preset before starting the recording.
