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A sampling of the unusual pitches at this year's showcase of 14 fund-seeking start-ups. DreamIt , a start-up incubator founded in Philadelphia hosted a demo day in Midtown Manhattan Wednesday for about 250 attendees, many of them venture capitalists and angel investors looking for the next Dropbox or Scvngr. Fourteen teams presented the start-up companies they have been developing for the past three months

Imagine snapping a panoramic picture from the top of the Empire State Building, then zooming in on a speck to reveal a quarter lying on the sidewalk. That’s the promise of single-shot gigapixel cameras--cameras that shoot images composed of at least one billion pixels, or picture elements