Title:
画像符号化装置及び画像復号装置、並びにそれらの制御方法
Document Type and Number:
Japanese Patent JP5173867
Kind Code:
B2
Abstract:
This invention generates, from multi-value image data, encoded data having a fixed length of L bits for each block including m×n pixels. An extraction unit extracts representative two colors C0 and C1 from an input block. A detection unit generates binary identification information, which indicates one of the colors C0 and C1 to which each pixel in the block is approximate. A generating unit determines, according to a deletion pattern, which of identification data elements indicating the color C0 and those indicating the color C1 are deleted more, and outputs the determination result as interpolated-identification data. A replacing unit replaces identification data which is the same as non-interpolated-identification data near the pixel position by the interpolated-identification data. A deletion unit deletes identification data according to the deletion pattern. A packing unit couples and outputs the colors C0 and C1, interpolated-identification data, and identification data after deletion.
Inventors:
Kenta Hozaki
Application Number:
JP2009012342A
Publication Date:
April 03, 2013
Filing Date:
January 22, 2009
Export Citation:
Assignee:
Canon Inc
International Classes:
H04N1/41; H04N11/04; H04N19/00; H04N19/20; H04N19/46; H04N19/70
Domestic Patent References:
| JP10093826A | ||||
| JP6216783A | ||||
| JP2001230934A |
Attorney, Agent or Firm:
Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu