Running late and my Raspbian SD card is acting up...
So I put my ODroid XU4 with MATE on one of the older
Microsoft LifeCam VX-6000 cameras I have.
My 'uname -a' on there is as below:
Code:
Linux odroid 3.10.92-71 #1 SMP PREEMPT Fri Dec 18 00:38:54 BRST 2015 armv7l armv7l armv7l GNU/Linux
The camera reports:
Code:
v4l2-ctl -l
User Controls
brightness (int) : min=0 max=255 step=1 default=127 value=127 flags=slider
contrast (int) : min=0 max=255 step=1 default=127 value=127 flags=slider
saturation (int) : min=0 max=255 step=1 default=127 value=127 flags=slider
hue (int) : min=-180 max=180 step=1 default=0 value=0 flags=slider
red_balance (int) : min=0 max=127 step=1 default=40 value=40 flags=slider
blue_balance (int) : min=0 max=127 step=1 default=40 value=40 flags=slider
gamma (int) : min=0 max=255 step=1 default=16 value=16 flags=slider
exposure (int) : min=0 max=6016 step=1 default=51 value=51 flags=inactive
gain_automatic (bool) : default=1 value=1 flags=update
gain (int) : min=0 max=28 step=1 default=0 value=0
horizontal_flip (bool) : default=0 value=0
vertical_flip (bool) : default=0 value=0
JPEG Compression Controls
compression_quality (int) : min=50 max=90 step=1 default=80 value=80
brightness (int) : min=0 max=255 step=1 default=127 value=127 flags=slider
contrast (int) : min=0 max=255 step=1 default=127 value=127 flags=slider
saturation (int) : min=0 max=255 step=1 default=127 value=127 flags=slider
hue (int) : min=-180 max=180 step=1 default=0 value=0 flags=slider
red_balance (int) : min=0 max=127 step=1 default=40 value=40 flags=slider
blue_balance (int) : min=0 max=127 step=1 default=40 value=40 flags=slider
gamma (int) : min=0 max=255 step=1 default=16 value=16 flags=slider
exposure (int) : min=0 max=6016 step=1 default=51 value=51 flags=inactive
gain_automatic (bool) : default=1 value=1 flags=update
gain (int) : min=0 max=28 step=1 default=0 value=0
horizontal_flip (bool) : default=0 value=0
vertical_flip (bool) : default=0 value=0
root@odroid:/home/odroid# v4l2-ctl --set-ctrl gain_automatic=0
When first plugged in or the system rebooted the image is too dark.
These series of commands fixed it for me:
Code:
v4l2-ctl --set-ctrl gain_automatic=0
v4l2-ctl --set-ctrl gain=10
This differs from our experience several years ago on Ubuntu Karmic.
The ranges are now reasonable for this older camera.
I will order the LifeCam 3000 HD to experiment further.
Below are the options from V4L presented for the Logitech C920 on the same embedded system:
Code:
v4l2-ctl -l
brightness (int) : min=0 max=255 step=1 default=128 value=128
contrast (int) : min=0 max=255 step=1 default=128 value=128
saturation (int) : min=0 max=255 step=1 default=128 value=128
white_balance_temperature_auto (bool) : default=1 value=1
gain (int) : min=0 max=255 step=1 default=0 value=0
power_line_frequency (menu) : min=0 max=2 default=2 value=2
white_balance_temperature (int) : min=2000 max=6500 step=1 default=4000 value=2397 flags=inactive
sharpness (int) : min=0 max=255 step=1 default=128 value=128
backlight_compensation (int) : min=0 max=1 step=1 default=0 value=0
exposure_auto (menu) : min=0 max=3 default=3 value=3
exposure_absolute (int) : min=3 max=2047 step=1 default=250 value=250 flags=inactive
exposure_auto_priority (bool) : default=0 value=1
pan_absolute (int) : min=-36000 max=36000 step=3600 default=0 value=0
tilt_absolute (int) : min=-36000 max=36000 step=3600 default=0 value=0
focus_absolute (int) : min=0 max=250 step=5 default=0 value=0 flags=inactive
focus_auto (bool) : default=1 value=1
zoom_absolute (int) : min=100 max=500 step=1 default=100 value=100
led1_mode (menu) : min=0 max=3 default=0 value=3
led1_frequency (int) : min=0 max=255 step=1 default=0 value=0
brightness (int) : min=0 max=255 step=1 default=128 value=128
contrast (int) : min=0 max=255 step=1 default=128 value=128
saturation (int) : min=0 max=255 step=1 default=128 value=128
white_balance_temperature_auto (bool) : default=1 value=1
gain (int) : min=0 max=255 step=1 default=0 value=0
power_line_frequency (menu) : min=0 max=2 default=2 value=2
white_balance_temperature (int) : min=2000 max=6500 step=1 default=4000 value=2397 flags=inactive
sharpness (int) : min=0 max=255 step=1 default=128 value=128
backlight_compensation (int) : min=0 max=1 step=1 default=0 value=0