Questions · Cameras
Is a fisheye camera any good for covering a whole room?
It is for seeing everything that happens in the room and knowing where each person moved, and it is no good for recognising anybody away from the centre. The sensor spreads its pixels over three hundred and sixty degrees, so the detail at any one point is a fraction of what a camera pointed at that point would give.
The practical rule is the ceiling height and the useful radius. Hung in the middle of a room with a normal ceiling, what is underneath is seen well; beyond a certain radius the person is seen from above, flattened and with few pixels on the face. That is why it fits very well in square, medium-sized rooms —a shop, an open-plan office, a lobby— and badly in long, narrow industrial units.
Nearly all of them correct the distortion in software, either in the camera itself or in the video software. It is worth checking where that correction is done before buying, because if it is only done at the viewing workstation, the exported video can come out with the circular image uncorrected and that is what whoever opens it elsewhere will see.
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A written answer is enough to decide whether it interests you. To know whether it works at your site you have to see it on a real scene, with the image as it is and, on top of it, what the system understands from it. That is on the IRIS Neural website, which is the group's product.