[caption id="attachment_63899" align="alignleft" width="210" caption="In Bexar County, Texas, where the five pilot schools are located, 33 percent of children living in poverty are obese."][/caption]Health officials trying to reduce obesity and improve eating habits at five San Antonio elementary schools unveiled a $2 million research project May 11 that will photograph students' lunch trays before they sit down to eat and later take a snapshot of the leftovers.

A computer program then analyzes the photos to identify every piece of food on the plate—right down to how...

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