Overhead scanner, image obtaining method, and computer-readable recording medium

摘要

An overhead scanner successively obtains a plurality of images by controlling an area sensor, calculates a movement pattern by image difference extraction by using the obtained images, detects a page turning movement on the basis of the movement pattern, and determines that a read operation be started when the page turning movement is detected.

主权项

1. An overhead scanner comprising:
an area sensor; and a control unit, wherein the control unit includes:
an area-image obtaining unit that successively obtains a plurality of images by controlling the area sensor,a movement-pattern calculating unit that calculates a movement pattern by image difference extraction which is to extract a difference between gradation values of pixels at the same coordinates by using the images obtained by the area-image obtaining unit,a movement detecting unit that detects a page turning movement on a basis of the movement pattern calculated by the movement-pattern calculating unit, anda read-start determining unit that determines that a read operation be started when the page turning movement is detected by the movement detecting unit.