公开(公告)号：US20110242628A1

公开(公告)日：2011-10-06

申请号：US13076577

申请日：2011-03-31

Applicant: Daisuke MORIKAWA

Inventor： Daisuke MORIKAWA

IPC: H04N1/46

CPC classification number: H04N1/4097 ,  H04N1/00013 ,  H04N1/00023 ,  H04N1/00037 ,  H04N1/00039 ,  H04N1/00087 ,  H04N1/00092 ,  H04N1/12 ,  H04N1/1235 ,  H04N1/125 ,  H04N1/193 ,  H04N1/62 ,  H04N2201/0081 ,  H04N2201/044

Abstract: An image reading apparatus capable of accurately detecting abnormal pixels caused by a contaminant such as dirt, stain, or flaw on a moving document reading glass being read. An image processing unit of the image reading apparatus performs a first abnormal pixel detection process to detect pixel signals representing abnormal pixels and output from image sensors for respective colors when a reading unit reads a guide plate in a main scanning direction in a state before an original passes through a moving document reading position, performs a second abnormal pixel detection process to detect pixel signals representing abnormal pixels and output from the image sensors when an original being conveyed is read by the reading unit in the main scanning direction, and detects a main scanning direction of abnormal pixels based on results of these detection processes.

Abstract translation: 一种图像读取装置，其能够准确地检测由正在读取的移动文件读数玻璃上的诸如污物，污点或缺陷的污染物引起的异常像素。 图像读取装置的图像处理单元执行第一异常像素检测处理，以在原稿之前的状态下，当读取单元在主扫描方向上读取导板时，检测表示异常像素的像素信号并从各种颜色的图像传感器输出 通过移动文档读取位置，执行第二异常像素检测处理以检测表示异常像素的像素信号并且当正被传送的原稿在主扫描方向上被读取单元读取时，从图像传感器输出，并且检测主扫描 基于这些检测过程的结果，异常像素的方向。