My webcam gives me very dark image, so I tried to find out how to adjust.
v4l2ucp - Video4Linux Universal Control Panel
A GUI control panel. It's very easy to adjust.
v4lctl of Xawtv
This program is part of Xawtv, a command-line tool. You can do with it like:
Unfortunately, my webcam has only small change on brightness and totally no difference on contrast.
v4l2ucp - Video4Linux Universal Control Panel
A GUI control panel. It's very easy to adjust.
v4lctl of Xawtv
This program is part of Xawtv, a command-line tool. You can do with it like:
$ v4lctl -c /dev/video0 list attribute | type | current | default | comment -----------+--------+---------+---------+------------------------------------- norm | choice | (null) | (null) | input | choice | tv8532 | tv8532 | tv8532 bright | int | 399 | 399 | range is 1 => 767 contrast | int | 32767 | 32767 | range is 0 => 65535 $ v4lctl -c /dev/video0 bright 80% $ v4lctl -c /dev/video0 contrast 75% $ v4lctl -c /dev/video0 list attribute | type | current | default | comment -----------+--------+---------+---------+------------------------------------- norm | choice | (null) | (null) | input | choice | tv8532 | tv8532 | tv8532 bright | int | 613 | 399 | range is 1 => 767 contrast | int | 49151 | 32767 | range is 0 => 65535You can
man v4lctl.Unfortunately, my webcam has only small change on brightness and totally no difference on contrast.