# 3D object size measurment with OpenCV

**URL:** <https://forum.opencv.org/t/3d-object-size-measurment-with-opencv/10373>\
**Category:** Python\
**Tags:** programming\
**Created:** [September 30, 2022, 10:33am UTC](https://forum.opencv.org/t/3d-object-size-measurment-with-opencv/10373 "2022-09-30T10:33:55Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Hripsime](https://avatars.discourse-cdn.com/v4/letter/h/cab0a1/32.png) [@Hripsime](https://forum.opencv.org/u/Hripsime)\
**Post date:** [September 30, 2022, 10:33am UTC](https://forum.opencv.org/t/3d-object-size-measurment-with-opencv/10373/1 "2022-09-30T10:33:55Z")

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The answer was not helpful…

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**Author:** ![crackwitz](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/crackwitz/32/14_2.png) [@crackwitz](https://forum.opencv.org/u/crackwitz)\
**Post date:** [September 30, 2022, 11:08am UTC](https://forum.opencv.org/t/3d-object-size-measurment-with-opencv/10373/2 "2022-09-30T11:08:20Z")

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> [@Hripsime](#):
>
> efficiently

before you can ask about efficiency, you have to have something functional first. I don’t see that.

what I see is that you copied the code from his blog and _tried_ to modify it. does that code even run? I’d bet it does not run, it throws exceptions. at one point you take the 2D points of a bounding box and act like these points had three coordinates.

please just get a proper course on image processing and computer vision. do not get anything from that dude. all I see him offering is a bunch of “recipes” implemented in code. that’s not teaching you the approaches or giving you a proper broad overview of the field.

> [@Hripsime](#):
>
> is it really possible to do a 3D object measurement with OpenCV

yes. depends on what you need it for, and what type of camera you have, and what object it is.