New to OPENMV, How far away do I place my CAM?

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TEANGA
Posts: 2
Joined: Fri Mar 20, 2020 10:46 pm

New to OPENMV, How far away do I place my CAM?

Postby TEANGA » Sat Mar 21, 2020 1:39 am

How far away would I need to place the CAM from an object (iPad screen) that is approx 250mm x 175mm? I would like it to be as close as possible so the whole 250mm x 175mm would take up the whole FOV I would assume.

New to this world, so I am at a lost when it comes to degrees and FOV and distance. If someone knows a good resource for me to learn I’d be grateful for it.
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kwagyeman
Posts: 4271
Joined: Sun May 24, 2015 2:10 pm

Re: New to OPENMV, How far away do I place my CAM?

Postby kwagyeman » Sat Mar 21, 2020 7:14 pm

Hi, see this: https://www.edmundoptics.com/knowledge- ... d-of-view/

Then for the camera sensor size see the OV7725 data sheet and see the OpenMV Cam H7 product page for the lens focal length.
Nyamekye,
TEANGA
Posts: 2
Joined: Fri Mar 20, 2020 10:46 pm

Re: New to OPENMV, How far away do I place my CAM?

Postby TEANGA » Sat Mar 21, 2020 7:18 pm

Thank you. I will for sure check out that site, looks very informative.

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