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vikas Nagpal
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vikas Nagpal
Asked: September 23, 2022In:
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Position Detection using ESP32

Hello, for a design, I am developing I need to see if an object( in my case, a bottle) is present on a shelf. There are 3 rows and 12 columns for each shelf, which is about 60 cm x ...Read more

Hello,
for a design, I am developing I need to see if an object( in my case, a bottle) is present on a shelf. There are 3 rows and 12 columns for each shelf, which is about 60 cm x 150 cm. I can use further than 1 cam to see the objects.
I never used any type of image recognition, so I would like to understand if you suppose it’s a good idea- in your opinion- to use a cam to capture the bottle on the shelf and also make an image recognition.
What do you think about it? Could it be possible? What instruments and libraries should I use?
Thanks!

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developingesp32
  1. ashishgawade

    The problem will be simpler if you can use a single camera above the shelf, and good contrast colors. also, you're just counting circular patches of not-shelf- color or bottle-cap- color. OpenCV might be oversupply for that, but probably has the exact law already written. Still, counting gets harderRead more

    The problem will be simpler if you can use a single camera above the shelf, and good contrast colors. also, you’re just counting circular patches of not-shelf- color or bottle-cap- color. OpenCV might be oversupply for that, but probably has the exact law already written.
    Still, counting gets harder, If you must look edge- on the shelf. But just detecting something is on the shelf( not counting) might be as simple as painting the wall behind the shelf a contrasting color and counting patches of not- background- color with further than N pixels.
    Good lighting will be important.

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nidhi singh
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nidhi singh
Asked: September 7, 2022In:
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Hello I’m developing an operation that does led control with a button, I use a counter for this, but every time I hold the button, the counter increases further than 1 So indeed if I hold the button down, I want ...Read more

Hello

I’m developing an operation that does led control with a button, I use a counter for this, but every time I hold the button, the counter increases further than 1 So indeed if I hold the button down, I want it to increase once.

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buttoncontroldevelopingledsoptoelectronics
  1. vikas Nagpal

    Perhaps you should debounce the button, as mechanical buttons bounce, i.e. may produce more than one pulse per button press. There are several techniques to do that, one of the easiest is to connect some small capacitor in parallel to the button, which together with the pull resistor forms some lowRead more

    Perhaps you should debounce the button, as mechanical buttons bounce, i.e. may produce more than one pulse per button press.

    There are several techniques to do that, one of the easiest is to connect some small capacitor in parallel to the button, which together with the pull resistor forms some low pass filter. The time constant of that filter should be slightly lower than the period of the maximum speed to press that button(e.g.100.200 ms). You’ll find this solution also at the NUCLEO or DISCOVERY boards.

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