Detect multiple letters

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blodarn
Posts: 2
Joined: Thu May 30, 2019 8:01 pm

Detect multiple letters

Postby blodarn » Thu Jun 13, 2019 10:08 pm

Hi,

I have a project where I want to detect numbers and word on the dashboard of a machine using an openmv Cam 7.

I'm using chars74k to detect the characters. The code is working but is it possible to make it able to detect multiple letters at the same time and not just one, same question for numbers ?

Thank you.
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kwagyeman
Posts: 3333
Joined: Sun May 24, 2015 2:10 pm

Re: Detect multiple letters

Postby kwagyeman » Thu Jun 13, 2019 10:17 pm

Yes, you need to pass the network an ROI where it should be executed for each expected letter location. You can get the ROI from using the GUI and selecting the frame buffer.

If you want to detect letter locations automatically you have to use find blobs to detect the letter centroids and then create ROIs from those centroids to fire the network on.
Nyamekye,
blodarn
Posts: 2
Joined: Thu May 30, 2019 8:01 pm

Re: Detect multiple letters

Postby blodarn » Fri Jun 28, 2019 9:58 am

Hi,

So the "while" will be executed on multiple ROI at the samed time to detect multiple characters ?
"You can get the ROI from using the GUI and selecting the frame buffer", what do you mean by that ?

Thank you.
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kwagyeman
Posts: 3333
Joined: Sun May 24, 2015 2:10 pm

Re: Detect multiple letters

Postby kwagyeman » Sat Jun 29, 2019 4:48 pm

Um, just select an area on the frame buffer and it will display the ROI of that area that you can pass to the code.
Nyamekye,

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