公开(公告)号：US5737095A

公开(公告)日：1998-04-07

申请号：US606948

申请日：1996-02-26

申请人： Shoji Kikuchi ,  Mineo Nozaki

发明人： Shoji Kikuchi ,  Mineo Nozaki

IPC分类号： H04N1/04 ,  H04N1/17 ,  H04N1/48 ,  H04N1/38 ,  H04N1/46 ,  F21V00/00

CPC分类号： H04N1/17 ,  H04N1/482

摘要： An image reading apparatus includes a plurality of light sources for illuminating an original, a photoelectric conversion device for converting light from the original illuminated by each of the plurality of illuminating means, and a discriminating circuit for discriminating whether or not any image exists on the original, based on image signals output from the photoelectric conversion device at least when the original is illuminated with light from one of the light sources, which possesses spectral characteristics including green. A control circuit controls the apparatus so that, when the discriminating circuit has determined that no image exists on the original, the manner of reading of the image with the light sources other than the light source employed in the discrimination performed by the discriminating circuit is changed from the manner of reading of the image with the light source employed in the discrimination.

摘要翻译： 图像读取装置包括用于照射原稿的多个光源，用于转换由多个照明装置中的每一个照明的原稿的光的光电转换装置，以及用于鉴别原稿上是否存在任何图像的鉴别电路 至少当原始光源从具有包括绿色的光谱特性的光源之一的光照射时，基于从光电转换装置输出的图像信号。 控制电路控制装置，使得当识别电路确定原稿上不存在图像时，改变用鉴别电路所进行的鉴别所采用的光源以外的光源读取图像的方式被改变 从使用歧视的光源读取图像的方式。