WO2004082260A1 - Jpeg圧縮ファイルの生成方法 - Google Patents
Jpeg圧縮ファイルの生成方法 Download PDFInfo
- Publication number
- WO2004082260A1 WO2004082260A1 PCT/JP2004/003344 JP2004003344W WO2004082260A1 WO 2004082260 A1 WO2004082260 A1 WO 2004082260A1 JP 2004003344 W JP2004003344 W JP 2004003344W WO 2004082260 A1 WO2004082260 A1 WO 2004082260A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coefficient
- compressed file
- value
- jpeg compressed
- jpeg
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/136—Incoming video signal characteristics or properties
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/124—Quantisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
- H04N19/172—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a picture, frame or field
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
Definitions
- step S14 derives a second quantization template by multiplying the reference first quantization table by the coefficient value Aq t derived in step S13. Processing.
- the frequency means a frequency when a change in pixel value is considered as a wave.
- Sj f depends on the image file before compression according to (the file size of the JPEG compressed file before conversion) 1 (the size of the image file that does not depend on the image file).
- the size of the data part not to be converted is converted to the file size that excludes it.
- step S 1 3 sets the constant file size S jf where JPEG compression desired file by the equation (4), to derive the file Irusaizu S jf 5 which is converted. Then, the converted file size S jf 5 is substituted for S jf of the approximate expression (1) derived in step S 12 to derive a coefficient value Aq t for deriving the first quantization table.
- the derivation is performed by adding the difference between the pixel values for each unit block 2. Since it is mainly performed by addition and subtraction, it is possible to derive the image feature amounts Va and Vb in a short time.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Compression Of Band Width Or Redundancy In Fax (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/548,439 US7599564B2 (en) | 2003-03-13 | 2004-03-12 | Jpeg-compressed file creating method |
DE112004000422T DE112004000422B4 (de) | 2003-03-13 | 2004-03-12 | Verfahren zum Erzeugen von JPEG-Kompressionsdateien, Vorrichtung zum Erzeugen von JPEG-Kompressionsdateien und Bildverarbeitungsgerät |
HK06103711A HK1083678A1 (en) | 2003-03-13 | 2006-03-24 | Jpeg-compressed file creating method, jpeg-compressed file creating apparatus and image processing apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-067891 | 2003-03-13 | ||
JP2003067891A JP3625211B2 (ja) | 2003-03-13 | 2003-03-13 | Jpeg圧縮ファイルの生成方法およびjpeg圧縮ファイルの生成装置および画像処理装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004082260A1 true WO2004082260A1 (ja) | 2004-09-23 |
Family
ID=32984574
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/003344 WO2004082260A1 (ja) | 2003-03-13 | 2004-03-12 | Jpeg圧縮ファイルの生成方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7599564B2 (ja) |
JP (1) | JP3625211B2 (ja) |
CN (1) | CN100391229C (ja) |
DE (1) | DE112004000422B4 (ja) |
HK (1) | HK1083678A1 (ja) |
WO (1) | WO2004082260A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101742279B (zh) * | 2008-11-11 | 2011-09-28 | 华晶科技股份有限公司 | Jpeg影像的压缩比的调整方法及其电子装置 |
KR102020220B1 (ko) | 2011-12-26 | 2019-09-11 | 삼성전자주식회사 | 이미지 압축 방법 및 장치 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02202268A (ja) * | 1989-01-31 | 1990-08-10 | Konica Corp | 画像データの圧縮装置 |
JPH0435268A (ja) * | 1990-05-28 | 1992-02-06 | Ricoh Co Ltd | 画像符号量予測符号化方法および装置 |
JPH0879762A (ja) * | 1994-09-01 | 1996-03-22 | Matsushita Electric Ind Co Ltd | 画像符号化復号装置 |
JPH09168149A (ja) * | 1995-12-15 | 1997-06-24 | Hitachi Ltd | デジタル画像データ圧縮方法及びデジタル画像処理システム |
JPH1023413A (ja) * | 1996-07-03 | 1998-01-23 | Fuji Xerox Co Ltd | 符号化装置 |
JP2002359695A (ja) * | 2001-06-01 | 2002-12-13 | Toshiba Corp | 移動通信端末とそのメール送信制御プログラム |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5333212A (en) * | 1991-03-04 | 1994-07-26 | Storm Technology | Image compression technique with regionally selective compression ratio |
JPH07505268A (ja) * | 1992-03-17 | 1995-06-08 | ゾーラン コーポレイション | 改良されたビットレート制御とブロック割り付けを有する画像圧縮コーダ |
US6285793B1 (en) * | 1995-11-06 | 2001-09-04 | Siemens Medical Systems, Inc. | Method and apparatus for automatically determining a quantization factor value that produces a desired average compression ratio of an image sequence using JPEG compression |
JPH1066004A (ja) | 1996-08-22 | 1998-03-06 | Sanyo Electric Co Ltd | 画像ファイルサイズ制御装置 |
US20020001412A1 (en) * | 1998-07-21 | 2002-01-03 | Hewlett-Packard Company | System for variable quantization in jpeg for compound documents |
US6349151B1 (en) * | 1998-12-29 | 2002-02-19 | Eastman Kodak Company | Method and apparatus for visually optimized compression parameters |
JP2000354246A (ja) * | 1999-06-10 | 2000-12-19 | Sony Corp | 画像圧縮制御装置およびそれを用いた撮像システム |
US6549674B1 (en) * | 2000-10-12 | 2003-04-15 | Picsurf, Inc. | Image compression based on tiled wavelet-like transform using edge and non-edge filters |
US7120303B2 (en) * | 2002-06-28 | 2006-10-10 | International Business Machines Corporation | Adaptive generation of Q-table2 for improved image quality |
-
2003
- 2003-03-13 JP JP2003067891A patent/JP3625211B2/ja not_active Expired - Fee Related
-
2004
- 2004-03-12 DE DE112004000422T patent/DE112004000422B4/de not_active Expired - Fee Related
- 2004-03-12 CN CNB200480000003XA patent/CN100391229C/zh not_active Expired - Fee Related
- 2004-03-12 US US10/548,439 patent/US7599564B2/en not_active Expired - Fee Related
- 2004-03-12 WO PCT/JP2004/003344 patent/WO2004082260A1/ja active Application Filing
-
2006
- 2006-03-24 HK HK06103711A patent/HK1083678A1/xx not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02202268A (ja) * | 1989-01-31 | 1990-08-10 | Konica Corp | 画像データの圧縮装置 |
JPH0435268A (ja) * | 1990-05-28 | 1992-02-06 | Ricoh Co Ltd | 画像符号量予測符号化方法および装置 |
JPH0879762A (ja) * | 1994-09-01 | 1996-03-22 | Matsushita Electric Ind Co Ltd | 画像符号化復号装置 |
JPH09168149A (ja) * | 1995-12-15 | 1997-06-24 | Hitachi Ltd | デジタル画像データ圧縮方法及びデジタル画像処理システム |
JPH1023413A (ja) * | 1996-07-03 | 1998-01-23 | Fuji Xerox Co Ltd | 符号化装置 |
JP2002359695A (ja) * | 2001-06-01 | 2002-12-13 | Toshiba Corp | 移動通信端末とそのメール送信制御プログラム |
Also Published As
Publication number | Publication date |
---|---|
JP2004282205A (ja) | 2004-10-07 |
DE112004000422T5 (de) | 2006-01-19 |
HK1083678A1 (en) | 2006-07-07 |
CN1698345A (zh) | 2005-11-16 |
DE112004000422B4 (de) | 2011-05-05 |
US7599564B2 (en) | 2009-10-06 |
JP3625211B2 (ja) | 2005-03-02 |
CN100391229C (zh) | 2008-05-28 |
US20070036451A1 (en) | 2007-02-15 |
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