On Monday 24 March 2008, Armin Berres wrote:
> On Monday 24 March 2008 22:04:05 Armin Berres wrote:
> > better)... I think I once tried the camera with Windows and I could
> > adjust the red and blue temperature -- any idea how this is possible?
> > Maybe Philips implemented this part somewhere in their driver/user space
> > tool?
>
> So, I was a brave guy and started Windows to check this out. Indeed one
> has the possibility to change the red and the blue balance independently.
> Actually I am very disappointed if Philips implemented this in a way which
> is not usable via UVC...
You can easily check the controls supported by your camera with lsusb. The
SPC1300NC should support the following control (that is if Philips hasn't
changed the device capabilities without changing the model name):
Auto-Exposure Mode
Auto-Exposure Priority
Exposure Time (Absolute)
Zoom (Absolute)
PanTilt (Absolute)
Brightness
Contrast
Hue
Saturation
Sharpness
Gamma
White Balance Temperature
Backlight Compensation
Gain
Power Line Frequency
White Balance Temperature, Auto
You can also use uvcdynctrl to see which controls have been detected by the
driver:
$ uvcdynctrl -c -d /dev/video0 -v
The Linux UVC driver doesn't do much beside exposing controls to userspace. If
the device doesn't have a white balance component control the driver won't
expose one. You'll have to compute the appropriate white balance temperature
value from the desired red and blue components.
Best regards,
Laurent Pinchart
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