Re: automagic brightness
Scott Laird writes:
> > In a response i got from scott, i think he said that the camera returned
> > some brightness value?
> I'm not sure -- I suspect I misread something from Russell. I haven't
> seen one anywhere yet, but I haven't been checking return values
> everywhere, and we still don't know what several commands do.
The only commands that we know exist and are undocumented are 0xd and 0xf.
> I'm probably going to add a stub for a brightness-adjuster in my next
> release. I don't know if it'll do anything :-), but at least the stub
> will be there. Hopefully that will promote some progress.
I've found that you get a reasonable brightness value just from
averaging all the pixels.
> The big problem was that the image seems to fade to white if you don't
> read it fast enough. Has anyone else noticed this? I've seen it when
> I've tried using qcam with a lot of debugging code added -- the picture
> keeps getting lighter and lighter as you wait, so you end up with a
> scan that's a lot darker at the top then at the bottom. When you're
> trying to resolve nearly black images it doesn't take much fading to
> destroy what little signal there is. I'll let others speculate why
> this happens :-).
It's a Charge-Coupled-Device. Wait too long and the charges leak
away. It's basically a dynamic ram without the opaque lid.
> > BTW: does anyone know if connectix is aware of this driver yet?
> They're aware of it. I haven't heard from them, but I do have a copy
> of the FTP logs from nas.com, and two people from connectix.com have
> accessed the ftp archives. I don't know *what* they accessed, but I
> don't think there's anything else of substance on the site. I mean,
> the FTP usage has more than tripled since I put qcam there.
They know, but no one @connectix.com has accessed the web site, so I'd
guess that they're looking at it from some generic netcom account or
something. [ Hi guys! -- This is better than cypherpunks and the
NSA -- there you can only assume that they're listening in -- here we
KNOW it. :) ]
> Is anyone from connectix.com on the mailing list?
Perhaps so, but not @connectix.com. Not much reason to be, when the
archives are available on the web site.
-russ <email@example.com> http://www.crynwr.com/~nelson
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