Webcam logitech - need to brighten picture

je suis desolee mais je ne comprend ps l'anglais et je n'arrive pas a ouvrir la lectue pour ecouter

Sorry my French is so bad it is non existent. Can you please translate to English?

this worked on my cam if it dont work dont save it

OK, this worked great for me, but let me neatly sum this all up.

I have a Sunplus Technology Co., Ltd Flexcam 100 (shabby little cam I got as a free gift when ordering contact lenses), so for other cameras, you'll want to adjust to different values.

My optimal settings were:
Gamma: 4
Red: 290
Green: 310
Blue: 315

Go to the the Linux Video settings directory:
CODE
cd /sys/module/gspca/parameters/

EVERY FOLLOWING COMMAND MUST BE RUN AS ROOT! (sudo doesn't handle the ">" redirection stuff elegantly without weird escaping, which I haven't mastered yet)

CODE
sudo su

And echo new values to the gamma and color files:
CODE
echo 4 > /sys/module/gspca/parameters/gamma
OR
echo 290 > /sys/module/gspca/parameters/GRed
OR
echo 310 > /sys/module/gspca/parameters/GGreen
OR
echo 315 > /sys/module/gspca/parameters/GBlue

After tweaking with these, right click the skype systray icon, and chose "Options", then "Video Devices", then click the video "Test" button to check it out. You'll need to close and reopen the options window after each change.

Once you've tweaked to the best config possible, save the module settings permanently to /etc/modprobe.d/options:

Add these lines (with your values) to the "/etc/modprobe.d/options" file:
CODE
options gspca gamma=4
options gspca GRed=290
options gspca GGreen=310 sudo gedit /etc/modprobe.d/options
options gspca GBlue=315

Thanks for the effort John, but sadly it did not work. There is no directory/file called /sys/module/gspca/parameters/gamma or GRed or GGreen or GBlue. there is however a directory called /sys/module/gspca_main/parameters but there are only a debug file. I also could not find the /etc/modprobe.d/options directory and file.

Thanks actionparsnip, that solved my question.