Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2006-10-10
2006-10-10
Lee, Thomas D. (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S003260, C358S001140, C358S474000, C382S275000
Reexamination Certificate
active
07119926
ABSTRACT:
In an image reading apparatus having a document feeder adapted to convey an original, an image sensor adapted to read the original conveyed to a platen by the document feeder, and a memory adapted to store image data for each pixel, control is executed to cause the image sensor to execute reading at a predetermined position a plurality of number of times without placing any original on the platen while driving the original convey member of the document feeder, the image data of the original output from the image sensor is compared with the image data of a corresponding pixel, which is stored in the memory, every time the original convey member is read, the image data stored in the memory is updated to data having a larger value, and the presence/absence and position of dust and/or dirt on the platen are detected on the basis of the number of times of reading the original convey member and the image data stored in the memory after the end of a plurality of number of times of reading the original convey member.
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English Abstract for JPA 6-078147.
English Abstract for JPA 9-135332.
English Abstract for JPA 63-208366.
English Abstract for JPA 2000-036908.
English Abstract for JPA 3-295357.
English Abstract for JPA 02-186870.
English Abstract for JPA 08-130616.
Maeda Yuichiro
Nishikata Akinobu
Osari Yoshihito
Saida Tadaaki
Sekiguchi Nobuo
Canon Kabushiki Kaisha
Lee Thomas D.
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