I need to know that different between scanning and taking photo from camera . As example we normally , SCAN QR code , bar code , like thing using android phone.They are also image. we can take photo from camera. it also image.
So ,is it Scanning QR code , mean take image and processing it or are there have any special thing take image from pixel values ?
from Are there any different between Scan image through camera and capturing image from camera?
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