Patent ID: 8467108
Filing Date: 2013-06-18
Classification: H04N

Abstract:
1. An image scanning device, comprising: a white reference board having a uniform white color; an irradiation device having a light source unit, the light source unit being configured to irradiate a reflection side of the white reference board from only one oblique direction; an image sensor being configured to detect reflected light from the white reference board; and a determination device being configured to determine if an attached substance exists on the reflection side of the white reference board based on the reflected light detected by the image sensor, wherein the light source unit has a light source, the irradiation device includes a reflection board, the reflection board is configured to rotate, the reflection board is configured to focus the light from the light source by its rotation and reflects the focused light onto a manuscript, and the irradiation device is configured to irradiate uniformly the manuscript with the light source and the reflection board when image data of the manuscript are scanned, and the irradiation device is configured to irradiate the reflection side of the white reference board from only one oblique direction with the light source before white reference data are generated.