Apparatus for producing unevenness correction data

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United States of America Patent

PATENT NO 5353052
SERIAL NO

07698561

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Abstract

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A correction data production apparatus includes a detecting unit for reading a test pattern formed by a recording head having a plurality of recording elements constituting an array, and for detecting a density distribution of a range of the array of the plurality of recording elements, a corresponding unit for causing the density distribution detected by the detecting unit to correspond to the plurality of recording elements on the basis of a reference position where a density of an end portion of the density distribution reaches a predetermined threshold value, a production unit for producing correction data for an image formation density uniforming drive conditions in correspondence with the plurality of recording elements on the basis of the density distribution corresponded by the corresponding unit, and a changing unit for changing the threshold value in accordance with characteristics of the test pattern.

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Patent Owner(s)

Patent OwnerAddress
CANON KABUSHIKI KAISHATOKYO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Danzuka, Toshimitsu Tokyo, JP 86 729
Fukushima, Hisashi Yokohama, JP 64 1148
Izumizaki, Masami Tokyo, JP 30 720
Miura, Yasushi Kawasaki, JP 91 1794
Moriguchi, Haruhiko Yokohama, JP 94 1747
Suzuki, Akio Yokohama, JP 254 3301
Takada, Yoshihiro Kawasaki, JP 99 2368
Takagi, Eiichi Yokohama, JP 18 378
Takahashi, Haruhiko Yokohama, JP 38 649
Takekoshi, Nobuhiko Yokohama, JP 39 700
Watanabe, Nobuyuki Yokohama, JP 143 1637

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