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answers:

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+1  Q: 

Object detection.

Hi,

I am trying to recognize the numbers on the 7-segment LCD display(like the digital watch), and first of all I want to 'draw' a bounding box to focus on the LCD screen to get rid of most of the background noise, but I am still not sure which method is suitable for this task. Can anyone help me?

A: 

I won't tell you the exact answer but as far as I can tell you should take a look at the OpenCV library. The keyword you're looking for in the first place is: Region Of Interest (ROI), ie. the bounding box.

mmm