We do this at MyFitnessPal.
When users scan their barcode, the preview window is zoomed in so users think its mostly barcode. We actually get quite a bit more background noise typically of a fridge, supermarket aisle, pantry etc. but it is sent across to us, stored, and trained on.
Within the next year we will have a pretty good idea of the average pantry, fridge, supermarket aisle. Who knows what is next
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