Image Reading Apparatus and Image Reading Method

摘要

An image reading apparatus is disclosed that includes a light emitting unit that illuminates light on an object; an image capturing device that receives incident light from the object and generates an electrical signal according to the intensity of the received incident light; an object detecting unit that detects the object being positioned close to the image capturing device; a disturbance light intensity determining unit that turns off the light emitting unit when the object detecting unit detects the object being positioned close to the image capturing device, controls the image capturing device to acquire pixel data of a predetermined number of pixels by imaging the object, and determines a disturbance light intensity based on the acquired pixel data; and a light accumulating time setting unit that sets a light accumulating time of the image capturing device based on the disturbance light intensity determined by the disturbance light intensity determining unit.