公开(公告)号：US6091844A

公开(公告)日：2000-07-18

申请号：US915473

申请日：1997-08-20

申请人： Tooru Fujii ,  Genki Yotsui ,  Tomohiko Hayakawa ,  Shinya Sonoda ,  Yoshinori Yamaguchi ,  Kouichi Oomae

发明人： Tooru Fujii ,  Genki Yotsui ,  Tomohiko Hayakawa ,  Shinya Sonoda ,  Yoshinori Yamaguchi ,  Kouichi Oomae

IPC分类号： G06K9/32 ,  G06K9/46 ,  G06K9/68 ,  G07D7/20 ,  G06K9/00

CPC分类号： G06K9/4609 ,  G06K9/32 ,  G06K9/68 ,  G07D7/20

摘要： An image processing device and method for identifying an input image and a copier including such an image processing device and method. The image processing device forms a gradated image from the input image, determines whether the gradated image includes a specified pattern, extracts a portion of the input image corresponding to the specified pattern, and compares the extracted portion of the input image with a reference pattern to determine a degree of resemblance between the extracted portion of the input image and the reference pattern.