Recommendations for HD camcorder for all-day static recording? I am working on a computer vision project where I will setup a camcorder in a room at around 6am and record people as they walk around and interact with things. The recording ends at 11pm. The room itself is huge (~50 ft tall) and I need to mount the camera either on the ceiling or on one of the rafters, so I'd prefer not to have to fetch an SD card at the end of each day if at all avoidable. The people are not moving super fast, but I will be doing motion analysis based on an image of the empty room, so it's important that the video be uncompressed (compression changes pixels and messes up the before/after diff for the motion tracking). Also, the people will be interested in viewing their actions later, so it needs to be in color and preferably HD. There is likely to be minor vibrations, so it also needs to be able to stabilize the video, though I imagine that is standard nowadays.

Given those requirements, does anyone have any recommendations for a camcorder? I'm looking in the sub-$400 range if at all possible.

Edit: Compressed video is fine after all. I was misunderstanding what kind of video my test data was using, but it seems to be compressed, so I can handle that. Also, if possible I'd like the camera to be able to just stream the video to a server on a local network so I can store it offline without having to retrieve the SD card.

Edit 2: After some more looking, it does seem like there are 30M (~64ft) active USB extension cables. So it's possible that I could run a cable to a laptop on the ground and not need to worry about power or SD storage. As a result, I'm currently leaning towards an HD webcam like AJ suggested.
Ok, so now that I got that comment out of my system, let me start by saying your expectation is 100% completely, totally and insanely unrealistic.  HD + uncompressed = a data rate measured in gigabytes (11.2 gigabytes to be specific) per minute (16.1 terabytes per 24 hour day) and is only available on very high end cameras (>$3000, without optics) price range.  Additionally, to not have to get the card every 30 minutes, let alone every day, you would need to have it wired in to a recorder elsewhere which means getting a record deck alone that will be over $600.  There is simply no possible way to accomplish all of your goals within an order of magnitude of your stated target cost.

For $6,000 or so, I could probably recommend a setup that would work nicely for capture and then you'd need another $4,000 or so just for the disk drives that could store it, but unless you can bear a reasonable level of compression, then it isn't going to be any cheaper.  Even SD would have problems running fully uncompressed for lengths of time without a dedicated professional deck, though SD might possibly drop the cost in to the 1 to 2k range.

While off topic for AVP, I would suggest that what you need to do is update your analysis to support compression.  Add a buffer that will recognize pixels that are close in color as the same and adjust as necessary until compression artifacts aren't recognized.  Unless people are all the same color as the floor, it should probably still be able to track pretty well.  

You'll need this anyway as from frame to frame, there are going to be variations in what hits the sensor even if you have a fully uncompressed signal.  Noise happens in the real world.  You have to deal with it.  The noise in the signal is going to be at least as much of a problem as most good compression, probably much more.