Title:
デジタル画像データ区分方法
Document Type and Number:
Japanese Patent JP4242532
Kind Code:
B2
Abstract:
An improved technique for compressing a color or gray scale pixel map representing a document using an MRC format includes a method of segmenting an original pixel map into two planes, and then compressing the data or each plane in an efficient manner is disclosed. The image is segmented by separating the image into two portions at the edges. One plane contains image data for the dark sides of the edges, while image data for the bright sides of the edges and the smooth portions of the image are placed on the other plane. A thresholding technique and apparatus for generating a bitmap is also disclosed that may be used to accomplish these tasks is also disclosed.
Inventors:
Ricardo El. Decaros
Zigan Fan
Truck Dee Tran
Zigan Fan
Truck Dee Tran
Application Number:
JP34267999A
Publication Date:
March 25, 2009
Filing Date:
December 02, 1999
Export Citation:
Assignee:
XEROX CORPORATION
International Classes:
H04N1/413; G06K9/20; G06T5/00; H04N1/41
Domestic Patent References:
| JP5176180A | ||||
| JP10294872A |
Attorney, Agent or Firm:
Atsushi Nakajima
Kato Kazunori
Kato Kazunori
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