Title:
A graphical-data-compression extending apparatus and an image forming device
Document Type and Number:
Japanese Patent JP6033461
Kind Code:
B2
Abstract:
An offset calculating unit (2) performs an offset process for a luma plane and/or chroma planes where the offset process compresses a pixel value range by a predetermined offset except for a saturation value. A compression processing unit (3) performs a lossy compression process using frequency conversion for the luma plane and the chroma planes after the offset process performed by the offset calculating unit (2). Further, a decompression processing unit (4) decompresses compressed data generated in the compression process performed by the compression processing unit (3) to a luma plane and chroma planes. An inverse offset calculating unit (5) performs an inverse offset process for a plane for which the offset process has been performed among the luma plane and the chroma planes after decompression by the decompression processing unit (4) where the inverse offset process expands a pixel value range by the offset.
Inventors:
Satomi Hoshiki
Toshiaki Rokuo
Toshiaki Rokuo
Application Number:
JP2015549079A
Publication Date:
November 30, 2016
Filing Date:
November 10, 2014
Export Citation:
Assignee:
Kyocera Document Solutions Co., Ltd.
International Classes:
H04N1/41; H04N19/86
Domestic Patent References:
| JP2010147895A | 2010-07-01 | |||
| JP2005101866A | 2005-04-14 | |||
| JP2015080019A | 2015-04-23 |
Attorney, Agent or Firm:
Osamu Aoki