New H7 Plus and AprilTags

General discussion about topics related to OpenMV.
ScottM
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Joined: Thu May 30, 2019 2:12 pm
Location: Ottawa, Canada

New H7 Plus and AprilTags

Postby ScottM » Thu Mar 05, 2020 11:21 am

Does the new H7 Plus camera address the issue with having to window down to 200x200 to read AprilTags due to limited memory? I see the Plus has the same spec of 1 MB RAM and 2 MB Flash.
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iabdalkader
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Joined: Sun May 24, 2015 3:53 pm

Re: New H7 Plus and AprilTags

Postby iabdalkader » Thu Mar 05, 2020 11:24 am

Yes there's an external 32MB SDRAM, so it can process much larger images.
ScottM
Posts: 91
Joined: Thu May 30, 2019 2:12 pm
Location: Ottawa, Canada

Re: New H7 Plus and AprilTags

Postby ScottM » Thu Mar 05, 2020 12:07 pm

So do you mean that I plug in a 32MB Micro SD card? What would then be the suggested maximum window size (resolution) and frame rate for reading April Tags?
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kwagyeman
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Re: New H7 Plus and AprilTags

Postby kwagyeman » Thu Mar 05, 2020 12:41 pm

The SD card has nothing to do with internal RAM. Since we have 32 MB of RAM onboard you can really max the resolution for processing AprilTags as large as you want. The frame rate will fall as you do that however.
Nyamekye,
ScottM
Posts: 91
Joined: Thu May 30, 2019 2:12 pm
Location: Ottawa, Canada

Re: New H7 Plus and AprilTags

Postby ScottM » Thu Mar 05, 2020 2:13 pm

Excellent. This is what I have been waiting for. I will put in a request to buy a couple.

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