Roman, I recently went through this problem. It seems that using setpwc to disable AGC is pointless, because the next time the camera is accessed, as far as I can tell, it defaults back to AGC on. This, however, is not a pwc problem, nor is it really a setpwc problem. Because the AGC setting resets every time you open the camera for access, you have to disable AGC, set your desired gain AND capture the images you want in one session.
In other words, the program you use to capture your images has to set the gain itself. -John -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Roman Haefeli Sent: Thursday, September 13, 2007 5:19 PM To: [email protected] Subject: [pwc] automatic gain control 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 ___________________________________________________________ Der fr|he Vogel fdngt den Wurm. Hier gelangen Sie zum neuen Yahoo! Mail: http://mail.yahoo.de _______________________________________________ pwc mailing list [email protected] http://lists.saillard.org/mailman/listinfo/pwc
