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    Help choosing cameras and system from a recent burglary victim

    I had a similar issue. One of the cameras could survey their back yard if I hadn't fine-tuned the angle. They were very concerned about their privacy, but when I showed them the picture stopped at the fence they were happy. The best thing to do is talk to your neighbors and keep them informed...
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    Camera Placement and Selection Help

    I think that you need to work out where your blind spots are with the proposed placement. If you want 360 degree coverage you are going to need to more cameras just because of the shape of the property.
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    DORI calculations

    Not in the bits I have changed. 80 per face is 150 per foot
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    DORI calculations

    Yeah, it looks like the Cliff Notes on the wiki needs a correction. Here is the original text: Here is what I would change it to: And if you can add a link to this calculator, that would likely help too. TheCalculation is already plugged in, so they can just edit HR, PPF and Angle.
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    DORI calculations

    The wiki page makes three separate references to ppf meaning pixels per face, none of ppf meaning pixels per foot. Typo?
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    DORI calculations

    Ah, order of operations issue. I grabbed it off the wiki page, so it could use a modification and some examples. Radius = (( Horizontal Res / Pixels per face ) * ( 360 / Angle )) / ( 2*Pi ) Assuming ppf of 5/20/40/100 for DORI So a 2MP camera with 1600 x 1200 and 87 degree Horizontal angle...
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    DORI calculations

    Same answer. 2560/100 = 25.6 360/76 = 4.74 25.6*4.74 = 121.344 121.344/2 = 60.672 60.672*3.14 = 190.51 (up by 0.2 because rounding) So unless one of the numbers in the formula is incorrect, this is what I have.
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    DORI calculations

    I'm not seeing it.
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    DORI calculations

    Wolfram Alpha did the calculation, (( 2560 / 100 ) * ( 360 / 76 ))/2*3.14
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    DORI calculations

    I have 190.38 which I am assuming is feet.
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    DORI calculations

    2560. I just remoted in and checked.
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    DORI calculations

    2560 x 1440 I think.
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    DORI calculations

    I have a system that I have wired and built myself, consisting of 9 Alptop AT-LIR400. The coverage is great, but I'm curious what the numbers are for it. 3.8mm lens, 76 degree angle, 4MP feed. How do I plug all of this into the DORI formula? Radius = (( Horizontal Res / 100 ppf ) * ( 360 /...
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    Can you mix and match camera brands

    @LCBrevard what is the spec of the BI server?
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