Five elementary schools in San Antonio will begin photographing children's lunch trays to calculate their calorie intake.

A new $2 million project in San Antonio, Texas will see high-tech cameras installed in school cafeterias that will take photographs of the food children put on their lunch trays, and what they don’t finish eating. The lunch trays each also have a unique bar code attached to them to track eating activity.

Funded by a U.S. Department of Agriculture grant, the project will use digital imaging technology to analyse the before and after lunch photographs, identifying what food children ate, calculating a child’s calorie intake and the nutrients in their meal.

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