Recognizing keys of piano on the image -

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I'm a newbie in image processing, so sorry it seems dumb for you.

I'm the manufacturing app that will show the keys to the user for whom they should press. I want to recognize the piano keys.

How can I get it? What advice can you give me (tutorials, online courses)?

Enter image details here

< Try the opencv tutorials, it's free and well documented. Just read all and think how you can use this feature for your work. Spend 1-2 months time, and ask here again, but more clearly, like: I use binary and morphology operations and half line detectors, but now I have this problem ...

You can use the word "binarization", "morphology operation" and "half line detector" as an indication.

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