•  14-04-2022
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Question

I am wondering what is the maximum distance of detection/recognition of an image using SURF method? Has any one tried. Camera: Logitech Webcam Pro 9000

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Solution

In computer vision the distance from camera does not really matter. What matters is the expanse size of the object contour. For example you can place a really huge object 10km from camera's object-glass and it could still cover the whole visual field. From CV point of view, it will be the same as having a small object right in front of the camera.

Known info:

  • your camera's max resolution: 1600*1200px
  • distance of the object: 5m

Unknown info:

  • size of the object - Roger Rowland's comment totally hit home ;)
  • visual complexity of the object
  • environmental conditions between camera and object
  • lighting conditions

You are unlikely to detect any objects further than ~2.9 million light-years from Earth without magnifier lenses, but this restriction has more kind of physical nature..

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