Ask Your Question

Measure the actual size of the object?

asked 2018-09-07 05:55:09 -0500

monxarat gravatar image

updated 2018-09-07 08:23:34 -0500

Hi guys, If I have the extrinsic and intrinsic matrix of the camera. Can I measure the actual size of the object?

Can't I do that with below?

The AR how to do that? image description

edit retag flag offensive close merge delete


the intrinsic matrix has the fov, but you still need the distance.

berak gravatar imageberak ( 2018-09-07 06:09:18 -0500 )edit

you have any ideas?

monxarat gravatar imagemonxarat ( 2018-09-07 08:34:50 -0500 )edit

Thank you so much. This wiki I have read it. The same as this

monxarat gravatar imagemonxarat ( 2018-09-07 08:47:05 -0500 )edit

so, where's the problem, now ?

real_size = fov * measured_size / measured_distance.
berak gravatar imageberak ( 2018-09-07 09:07:13 -0500 )edit

How to measure distance(measured distance) auto? You can explant me how to?

the AR how to do that?

monxarat gravatar imagemonxarat ( 2018-09-11 04:04:16 -0500 )edit

Have not measured_distance value? How to auto measure it.

monxarat gravatar imagemonxarat ( 2018-09-19 00:07:03 -0500 )edit

1 answer

Sort by » oldest newest most voted

answered 2018-09-07 07:19:57 -0500

LBerger gravatar image

No and no again... I take a picture :

What is clock size ?

image description

image description

image description

Ayache [1989]

Vision Stéréoscopique et Perception Multisensorielle Intereditions

edit flag offensive delete link more


How to measuring like AR? Do you have any ideas?

monxarat gravatar imagemonxarat ( 2018-09-07 08:40:44 -0500 )edit

For some AR methods the markers used are of a known size so this provides scale information.

maym86 gravatar imagemaym86 ( 2018-09-07 13:17:23 -0500 )edit

Question Tools

1 follower


Asked: 2018-09-07 05:55:09 -0500

Seen: 189 times

Last updated: Sep 07 '18