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Camcorder help

  1. Jul 15, 2009 #1
    I'm searching for a hand-held video camera that I can use for my computer vision research. We've got a Prosilica GC650 camera in the lab ( http://www.prosilica.com/products/gc650.html [Broken] ), but I need to take it out into the field to get hand-held footage. This doesn't work because it's designed to be mounted and connected directly to a computer...and our current setup is not very mobile.

    I got a Sony Handycam for taking hand-held video, and recorded to miniDV. I just got back from the media lab where I was planning to convert my first test videos on the miniDV into a digital video for processing. Analyzing the video on the computer shocked me -- the spatial compression artifacts were beyond my wildest imaginations. It looks like someone went wild with a rectangular marquee selection tool, grabbing random chunks of my image and transposing them by random offsets...sometimes 5, 10, even 50 pixels. In other words, the video I was looking at was more like a photo montage that barely resembled the true scenery. All of the data I had recorded is completely useless...as my algorithms work with subpixel precision, so a transposition of even 1 pixel is going to be the greatest source of triangulation error in my 3D reconstruction.

    Even my webcam does not have artifacts nearly this bad. Sometimes it makes transposition glitches as well, but it's more unusual, not on every frame like this. Unfortunately my web cam is also not portable and has some light sensitivity issues (although these are not as serious as transposition errors).

    I spied someone else in the lab recording from VHS tape, and he did not have these bad compression artifacts. I could actually work with that kind of video.

    Can anyone speak from experience on good affordable options for hand held video that will be free of these transposition encoding artifacts? Are all the digital formats susceptible to this? Am I better off with an analog format? I'm thinking S-VHS
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
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