On Wednesday, April 02, 2014 01:31:25 Craig Bergdorf wrote: > To expand: the solutions that people use (including myself who recently put > a cam in a welding station of a shop), are just letting less light into the > camera by either aggressive iris settings or an external wideband filter > (deep sunglasses) and compensate with software to be able to bounce off > saturation in a small area, or buy a camera rated for this. Week 3 of a > decent (c-mount) ip cam starring at 3 welding stations with no problems so > far. I just locked the motorized iris at minimum during open hours and > compensate with software, it's grainy, but acceptable. After closing it > goes back to auto for night stalking. > > Uv is just far easier (higher efficiency) for ccds to pickup than the > visible light spectrum, why a nikon d100 slr with the uv filter carefully > pryed off the sensor makes for some amazing pictures. > > Afaik The cam isn't pointed at where welding is expected to happen, I think > were good without drastically lowering the signal to noise ratio with a > filter. A few pixels saturating doesn't hurt it, only a whole row, and at > that point, IR heat is what's going to do the damage. > > Can we just leave it? And mention "please be aware of the camera if your > going to weld in a new place until the walls are done"?
I'm cool with this. Its a lot easier than trying to solve a problem that has happened only once before and we already know to never point the camera at the welder. The welder shouldn't even be in a place where someone could casually glance at it anyways, but walls will help with that. > > On Apr 2, 2014 12:32 AM, "Torrie Fischer" <[email protected]> wrote: > > On Tuesday, April 01, 2014 17:41:09 a l wrote: > > > We should get a lens filter to alleviate this issue. I don't think > > > > they're > > > > > terribly expensive > > > > UV light doesn't kill a CCD. > > > > It is more about the net intensity than any particular wavelength. > > > > Welding creates a spark gap transmitter, which emits radiation in a wide > > range > > of frequencies. There isn't any one distinct frequency, as it is > > essentially a > > form of white noise across the EM spectrum. > > > > Pointing the camera at the sun won't kill it. Taking every photon that > > hits > > within the city limits of Akron and squeezing it into a densely packed and > > tiny CCD will, as the absorption will produce a lot of heat. > > > > > Regards, > > > Andrew L > > > > > > On Mar 29, 2014 6:52 PM, "Justin Herman" <[email protected]> wrote: > > > > Just as a reminder, If you are welding, you need to not do it in front > > > > of > > > > > > the webcam. The CCD is not protected from the UV light the welder > > > > produces. > > > > The UV will damage the Webcam. > > > > > > > > On Sat, Mar 29, 2014 at 5:11 PM, Torrie Fischer > > > > <[email protected]>wrote: > > > >> Webcam's back! > > > >> > > > >> Check it out on live.synhak.org. > > > >> _______________________________________________ > > > >> Discuss mailing list > > > >> [email protected] > > > >> https://synhak.org/mailman/listinfo/discuss > > > > > > > > _______________________________________________ > > > > Discuss mailing list > > > > [email protected] > > > > https://synhak.org/mailman/listinfo/discuss > > > > _______________________________________________ > > Discuss mailing list > > [email protected] > > https://synhak.org/mailman/listinfo/discuss
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