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1 | initial version |

so, you need the fov and the distance, to calculate the size.

and you probably don't have any of it, given arbitrary images as input.

2 | No.2 Revision |

so, you need the fov and the distance, to calculate the size.

and you probably don't have any of it, given arbitrary images as input.

(as long as it's like that -- what yu want is not possible)

3 | No.3 Revision |

so, there's fov, size and distance, you need ~~the fov and the distance, ~~to know 2 of them, to calculate the ~~size.~~third.

and you probably don't have any of it, given arbitrary images as input.

(as long as it's like that -- what ~~yu ~~you want is not possible)

4 | No.4 Revision |

so, there's fov, size and distance, you need to know 2 of them, to calculate the third.

(you *can* get the fov from calibrating your camera, also you *can* get the distance, if you're using a stereo rig or a depth cam, like kinect)

and you probably don't have any of it, given arbitrary images as input.

(as long as it's like that -- what you want is not possible)

5 | No.5 Revision |

so, there's fov, size and distance, you need to know 2 of them, to calculate the third.

and you probably don't have any of it, given arbitrary images as input.

(you *can* get the fov from calibrating your camera, also you *can* get the distance, if you're using a stereo rig or a depth cam, like kinect)

~~and you probably don't have any of it, given arbitrary images as input.~~

(as long as it's like that -- what you want is not possible)

6 | No.6 Revision |

so, there's fov, size and distance, you need to know 2 of them, to calculate the third.

and you probably don't have any of it, given arbitrary images as input.

(you *can* get the fov from calibrating your camera, also you *can* get the distance, if you're using a stereo rig or a depth cam, like kinect)

~~(as ~~(again, as long as ~~it's like that ~~long as you use arbitrary images, and have no control about the camera params -- what you want is simply not possible)

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