hello
i plan to use my SPC 900NC for an artistic project. therefor i want to
make a comparison between a buffered background image and the realtime
image in order to remove the background of the image.
however, this only works, if i manage to keep the gain stable. according
to 'setpwc -h', i am supposed to set a value for automatic gain control
by using "setpwc -g <0-65535>". actually, i am not quite sure what
"setting the automatic gain control" means. i mean, why is there a user
settings, when it is done automatically anyway?
i had the impression, that this setting doesn't affect anything or it
gets overwritten instantly by the automatic gain control. i found out,
that whenever i access the cam through setpwc (or mplayer or
whatsoever), the gain is adapted.
doing 'setpwc -p', while pointing the cam towards a light, i get:
Automatic gain control: -2502
doing the same while pointing the cam into the dark, i get:
Automatic gain control: -25815
to sum it up:
the option '-g' doesn't show any effect at all.
the values seem to be in the negative range, not in the range 0-65535,
as mentioned in the help.
is this a bug? (of pwc or setpwc?)
is there some way to get rid of automatic gain control?
is this something the driver does or the camera itself?
i am using:
pwc-10.0.12-rc1
setpwc v1.1
thanks in advance
roman
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