WO2002078322A1 - Verfahren zur komprimierung und dekomprimierung von bilddaten - Google Patents
Verfahren zur komprimierung und dekomprimierung von bilddaten Download PDFInfo
- Publication number
- WO2002078322A1 WO2002078322A1 PCT/DE2002/000995 DE0200995W WO02078322A1 WO 2002078322 A1 WO2002078322 A1 WO 2002078322A1 DE 0200995 W DE0200995 W DE 0200995W WO 02078322 A1 WO02078322 A1 WO 02078322A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pixel
- image
- value
- pixels
- groups
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000007906 compression Methods 0.000 title claims abstract description 11
- 230000006835 compression Effects 0.000 title claims abstract description 11
- 230000006837 decompression Effects 0.000 title abstract description 3
- 238000004364 calculation method Methods 0.000 claims abstract description 6
- 238000004040 coloring Methods 0.000 abstract 1
- 230000008929 regeneration Effects 0.000 abstract 1
- 238000011069 regeneration method Methods 0.000 abstract 1
- 238000012913 prioritisation Methods 0.000 description 6
- 238000005457 optimization Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003945 visual behavior Effects 0.000 description 1
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
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
- H04N19/593—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving spatial prediction techniques
Definitions
- the invention relates to a method for compressing and decompressing image data.
- a grid is placed over the image. Each raster point corresponds to one pixel.
- a pixel value is encoded with one bit (e.g. WBMP -> black and white) or several bits (e.g. BMP -> true color).
- WBMP -> black and white e.g. WBMP -> black and white
- BMP -> true color e.g. WBMP -> black and white
- Various compression methods can be used to reduce the size of the image files. An effective method is to reduce the bits per pixel.
- methods can be used in which pixels form groups be summarized. These are usually quadratic areas, which are then transformed into the frequency domain using DCT (Discrete Cosine Transformation). The high frequency components generated during the transformation can be neglected without noticeable quality losses. This procedure is used for example with JPEG images. At very high JPEG compressions, it can lead to disturbing, rectangularly nested image spots - so-called "artifacts”.
- the object of the invention is to provide a method for compressing and decompressing image data, which allows simple and flexible adaptation to memory size, different image resolutions and display sizes.
- the invention is based on a combination of the pixel-based and vector-based technology.
- the picture is overlaid with a grid.
- the pixel value i.e. Color value or brightness value
- a further value hereinafter referred to as the pixel difference value, is then calculated for each pixel from a previously defined number of neighboring pixels.
- the pixel difference value results from the difference between the pixel value of a pixel under consideration and each of its neighboring pixels under consideration. The greater the difference between the pixel value and its neighboring pixels, the higher this value.
- the pixel difference values of the individual pixels of the image are sorted in descending order.
- the pixels used for the calculation of a pixel difference value are each combined into a pixel group.
- the pixel groups obtained in this way are sorted according to the descending sorting of the pixel difference values, i.e. according to their priority determined by the pixel difference value.
- the result is a list of priorities, with the pixel groups whose pixel difference value and thus priority is the largest appearing at the top of the list.
- the pixel values of the pixel groups can be determined by run length coding or other known compression methods, e.g. Zip process to be further compressed.
- the pixel groups with the highest pixel difference values are loaded first.
- a triangle is formed from three closest pixel groups.
- Triangles are scalable in size, and can thus be different Resolutions can be adjusted. If certain image areas are to be reproduced particularly precisely, the pixel groups of these areas can be given a higher priority.
- the area of the respective triangles is filled by a color gradient which is calculated from the color values of the three pixel groups forming the corners of the triangle.
- the respective brightness value of the pixels or pixel groups is considered instead of the color values and a corresponding brightness curve is calculated.
- the method enables the manufacturer or image processing professionals to use manufacturer-specific optimization routines by different prioritization of the pixel groups. However, since the source pixel values are always transmitted, the image can also be generated again without using the manufacturer-specific optimization routines.
- the method is very fault-tolerant, since the image can be generated again even in the event of transmission errors in individual pixel groups.
- Figure 1 Representation of an image array of 20 x 21 pixels
- Figure 2 Representation of different shapes of pixel groups
- Figure 3 Newly generated image array with inserted pixel groups in the
- the image source is a bitmap, i.e. as an image array.
- Each pixel of the image array is represented by a 32 bit value (pixel value).
- the 32 bits are e.g. divided into 4 values (transparent, red, green, blue), each with 8 bits.
- the image array shown as an example is an image with an image width of 20 pixels and an image height of 21 pixels.
- the position of the pixels is determined by an integer.
- the image array is counted from 0 to 419 in the manner shown in FIG. 1. The number within each box corresponds to the position of the associated pixel.
- the image is compressed as follows: Read in image array
- Each pixel is defined by its position (0 to 419) and its pixel value (color or brightness value).
- a pixel group for the reference pixel pO results from the type (shape) of the pixel group used.
- Some possible shapes of pixel groups are shown by way of example in FIG. Both symmetrical and asymmetrical pixel groups can be formed with respect to the reference pixel pO.
- What type of pixel group is used includes depending on the type of image material and the desired compression rate. As a rule, the compression factor to be achieved is greater, the more pixels a pixel group comprises. For coding and decoding, i.e. compressing and decompressing the image must use the same form of pixel groups.
- the pixels at the edge of the image can be given special treatment, for example by selecting a certain pixel group shape in the edge area or reducing the area to be viewed (cutting off the edge areas).
- Various calculation methods can be used to calculate the priority.
- a linear method is used here as an example.
- the individual pixel values PO, P1, P2, P3 and P4 of a pixel group are broken down into their color components red, green and blue. Each of these color values is represented by 8 bits.
- a color difference value is now determined in relation to PO, e.g. P0_rot - P1_rot, P0_rot - P2_rot, ..., P0_blau - P4_blau.
- the absolute color difference values are added and divided by the number of colors and the number of pixels considered. The result is a priority value for the pixel group under consideration. This priority value is higher, the more different the color values of the individual pixels of the pixel group are.
- This prioritization ensures that image areas that have a large change in color or contrast, such as Edges, get a high priority, and relatively constant image content, such as blue sky, a low one.
- the priority values are sorted by size in descending order. Depending on the implementation, sorting can be carried out after determining each new priority value or afterwards. Depending on the available resources, in addition to pure prioritization by the color values of neighboring pixels, dependencies on the location of the prioritized pixel groups can also be used.
- Another way of prioritizing is to upgrade certain areas of the image.
- Such an image area can be, for example, faces in photos. Although faces on holiday photos sometimes only make up a small percentage of the entire image, they are usually the focus when looking at them.
- Such human visual behavior can be taken into account by appropriately prioritizing the pixel groups of these image areas (face areas). Likewise, the pixel groups in the center of the image can experience a correspondingly higher prioritization.
- Another possibility for optimization consists in the fact that neighboring pixel groups overlap one another. By cleverly selecting the pixel groups, it can be avoided that overlapping pixel values are repeatedly transmitted to neighboring pixel groups.
- the individual pixel groups are then saved according to their priority, i.e. Pixel groups with high priority are saved first (and later also read out first).
- the position value of the reference pixel pO of the pixel group is first stored.
- the pixel values PO, P1, P2, P3, P4 are then stored.
- Position value PO pixel values PO, P1, P2, P3, P4; Next position value PO (with the same or lower priority), pixel values P1, P2, P3, P4, ..., next position value PO (with lowest priority), pixel values PO, P1, P2, P3, P4.
- a run length coding of the pixel groups can be carried out. For example, if there are no red parts in an image area, this can only be transmitted with 2 bits instead of 8 bits (red), or the number of leading zeros can be used. Common compression methods such as zip format can also be used.
- a certain quality can be guaranteed by setting a limit value for prioritization.
- a limit value can be set for the pixel difference values below which the assigned pixel group always gets the lowest priority value.
- the prioritization ensures that the most important image information is saved first.
- the parameters of the image are first read in and evaluated.
- Examples are the image width, image height and shape of the pixel group.
- An initially empty image array comparable to the illustration in FIG. 1 is then generated from these values. If the image height and image width do not match between the original image and the desired display (e.g. limited PDA display or high-resolution screen), you have to scale accordingly.
- conversion factors are first determined (image width_original / image width_display and image height_original / image height_display). These factors can be used to convert the position value from the original image to the position value of the new display.
- the 4 pixel groups of the corners are entered in the newly generated image array.
- the position (pO) of the respective pixel group is determined by the fields 21, 38, 381 and 398 with a black background. This position value (pO) is available as an integer value in the saved file.
- the dark gray-gray pixel values (p1-p4) belonging to the respective pixel group can then be entered in the new image array.
- the intermediate, light gray marked pixel values can then be calculated from the dark gray and black marked fields.
- the remaining areas are filled in by drawing horizontal lines, e.g. from position 63 to position 74, from position 82 to position 93, etc. Again, a preliminary color gradient between the points is calculated as indicated above,
- each further pixel group added results in further triangles which can be filled in accordingly.
- the resolution can now be refined with each additional pixel group.
- the addition of the pixel group 87 leads to 4 triangles with the reference points (21, 38, 87), (21, 87, 381), (381, 87, 398), (398, 78, 38). If a further pixel group (247) is inserted within such a triangle, e.g. 87, 381, 398, 3 new triangles (247,381, 398), (247, 87, 381) and (247,87, 398) are created.
- Each new pixel group thus creates 3 new triangles that can be filled in.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02727252A EP1374559B1 (de) | 2001-03-21 | 2002-03-19 | Verfahren zur komprimierung und dekomprimierung von bilddaten |
JP2002576416A JP3887664B2 (ja) | 2001-03-21 | 2002-03-19 | 画像データの圧縮及び伸張方法 |
CA2441372A CA2441372C (en) | 2001-03-21 | 2002-03-19 | Method for compression and decompression of image data |
DE50206898T DE50206898D1 (de) | 2001-03-21 | 2002-03-19 | Verfahren zur komprimierung und dekomprimierung von bilddaten |
US10/472,288 US7359560B2 (en) | 2001-03-21 | 2002-03-19 | Method for compression and decompression of image data with use of priority values |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10113881.4 | 2001-03-21 | ||
DE10113881 | 2001-03-21 | ||
DE10152612A DE10152612B4 (de) | 2001-03-21 | 2001-10-25 | Verfahren zur Komprimierung und Dekomprimierung von Bilddaten |
DE10152612.1 | 2001-10-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002078322A1 true WO2002078322A1 (de) | 2002-10-03 |
Family
ID=26008857
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/000995 WO2002078322A1 (de) | 2001-03-21 | 2002-03-19 | Verfahren zur komprimierung und dekomprimierung von bilddaten |
Country Status (12)
Country | Link |
---|---|
US (1) | US7359560B2 (de) |
EP (1) | EP1374559B1 (de) |
JP (1) | JP3887664B2 (de) |
CN (1) | CN1233146C (de) |
AT (1) | ATE327636T1 (de) |
CA (1) | CA2441372C (de) |
CZ (1) | CZ20032890A3 (de) |
DE (1) | DE50206898D1 (de) |
ES (1) | ES2265500T3 (de) |
PT (1) | PT1374559E (de) |
RU (1) | RU2279189C2 (de) |
WO (1) | WO2002078322A1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10229976B4 (de) * | 2002-07-03 | 2007-06-28 | T-Mobile Deutschland Gmbh | Verfahren zur Ver- und Entschlüsselung von nach dem Verfahren der priorisierten Pixelübertragung übertragenen oder gespeicherten digitalen Daten |
DE10230809B4 (de) * | 2002-07-08 | 2008-09-11 | T-Mobile Deutschland Gmbh | Verfahren zur Übertragung von Audiosignalen nach dem Verfahren der priorisierenden Pixelübertragung |
DE10230812B4 (de) * | 2002-07-08 | 2004-11-25 | T-Mobile Deutschland Gmbh | Verfahren zur Übertragung von zusätzlichen Informationen bei Verwendung eines Verfahrens zur Komprimierung von Daten mittels einer priorisierenden Pixelübertragung |
JP4822396B2 (ja) * | 2005-03-29 | 2011-11-24 | 株式会社メガチップス | 画像強調装置 |
US20070025630A1 (en) * | 2005-07-27 | 2007-02-01 | Sung Chih-Ta S | Method and apparatus of image compression |
CN100437596C (zh) * | 2005-12-20 | 2008-11-26 | 鸿富锦精密工业(深圳)有限公司 | 尺寸号码自动标注系统及方法 |
CN101123668B (zh) * | 2006-08-08 | 2010-12-15 | 上海西门子医疗器械有限公司 | Ct图像的压缩方法 |
KR101415564B1 (ko) | 2007-10-29 | 2014-08-06 | 삼성디스플레이 주식회사 | 표시 장치의 구동 장치 및 방법 |
DE102007052622A1 (de) * | 2007-11-05 | 2009-05-07 | T-Mobile International Ag | Verfahren zur Bildanalyse, insbesondere für ein Mobilfunkgerät |
KR101775555B1 (ko) * | 2010-03-02 | 2017-09-07 | 삼성전자주식회사 | 동영상 패킷 생성 방법 및 그 장치 |
CN104869327A (zh) * | 2015-05-28 | 2015-08-26 | 惠州Tcl移动通信有限公司 | 一种高清显示屏的图像文件快速显示的方法及系统 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05244435A (ja) * | 1992-02-28 | 1993-09-21 | Fujitsu Ltd | 画像の階層符号化方法および画像符号化装置 |
US5647024A (en) * | 1994-03-12 | 1997-07-08 | Victor Company Of Japan, Ltd. | Multi dimensional image compression and decompression method using feature points on a luminance contour line |
US5675669A (en) * | 1995-03-20 | 1997-10-07 | Daewoo Electronics, Co., Ltd. | Apparatus for encoding/decoding an image signal having a still object |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6496607B1 (en) * | 1998-06-26 | 2002-12-17 | Sarnoff Corporation | Method and apparatus for region-based allocation of processing resources and control of input image formation |
US6731792B1 (en) * | 1998-08-24 | 2004-05-04 | Minolta Co., Ltd. | Method and apparatus for accurately dividing a color image into proper regions, and storage media storing a program for executing such a method |
US6897977B1 (en) * | 2000-11-20 | 2005-05-24 | Hall Aluminum Llc | Lossy method for compressing pictures and video |
US6901169B2 (en) * | 2001-02-01 | 2005-05-31 | At & T Corp. | Method and system for classifying image elements |
-
2002
- 2002-03-19 ES ES02727252T patent/ES2265500T3/es not_active Expired - Lifetime
- 2002-03-19 DE DE50206898T patent/DE50206898D1/de not_active Expired - Lifetime
- 2002-03-19 CN CNB028069269A patent/CN1233146C/zh not_active Expired - Fee Related
- 2002-03-19 US US10/472,288 patent/US7359560B2/en not_active Expired - Lifetime
- 2002-03-19 WO PCT/DE2002/000995 patent/WO2002078322A1/de active IP Right Grant
- 2002-03-19 CZ CZ20032890A patent/CZ20032890A3/cs unknown
- 2002-03-19 JP JP2002576416A patent/JP3887664B2/ja not_active Expired - Fee Related
- 2002-03-19 EP EP02727252A patent/EP1374559B1/de not_active Expired - Lifetime
- 2002-03-19 PT PT02727252T patent/PT1374559E/pt unknown
- 2002-03-19 CA CA2441372A patent/CA2441372C/en not_active Expired - Fee Related
- 2002-03-19 AT AT02727252T patent/ATE327636T1/de active
- 2002-03-19 RU RU2003130966/09A patent/RU2279189C2/ru not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05244435A (ja) * | 1992-02-28 | 1993-09-21 | Fujitsu Ltd | 画像の階層符号化方法および画像符号化装置 |
US5647024A (en) * | 1994-03-12 | 1997-07-08 | Victor Company Of Japan, Ltd. | Multi dimensional image compression and decompression method using feature points on a luminance contour line |
US5675669A (en) * | 1995-03-20 | 1997-10-07 | Daewoo Electronics, Co., Ltd. | Apparatus for encoding/decoding an image signal having a still object |
Non-Patent Citations (8)
Title |
---|
BELL D M ET AL: "PROGRESSIVE TECHNIQUE FOR HUMAN FACE ARCHIVING AND RETRIEVAL", JOURNAL OF ELECTRONIC IMAGING, SPIE + IS&T, US, vol. 5, no. 2, 1 April 1996 (1996-04-01), pages 191 - 197, XP000596290, ISSN: 1017-9909 * |
CARLSSON S: "SKETCH BASED CODING OF GREY LEVEL IMAGES", SIGNAL PROCESSING. EUROPEAN JOURNAL DEVOTED TO THE METHODS AND APPLICATIONS OF SIGNAL PROCESSING, ELSEVIER SCIENCE PUBLISHERS B.V. AMSTERDAM, NL, vol. 15, no. 1, 1 July 1988 (1988-07-01), pages 57 - 83, XP000001795, ISSN: 0165-1684 * |
CHEE Y-K: "SURVEY OF PROGRESSIVE IMAGE TRANSMISSION METHODS", INTERNATIONAL JOURNAL OF IMAGING SYSTEMS AND TECHNOLOGY, WILEY AND SONS, NEW YORK, US, vol. 10, no. 1, 1999, pages 3 - 19, XP000805935, ISSN: 0899-9457 * |
KUNT M ET AL: "SECOND-GENERATION IMAGE-CODING TECHNIQUES", PROCEEDINGS OF THE IEEE, IEEE. NEW YORK, US, vol. 73, no. 4, 1 April 1985 (1985-04-01), pages 549 - 574, XP000611041, ISSN: 0018-9219 * |
MARSHALL S: "APPLICATION OF IMAGE CONTOURS TO THREE ASPECTS OF IMAGE PROCESSING: COMPRESSION, SHAPE RECOGNITION AND STEREOPSIS", IEE PROCEEDINGS I. SOLID- STATE & ELECTRON DEVICES, INSTITUTION OF ELECTRICAL ENGINEERS. STEVENAGE, GB, vol. 139, no. 1 PART 1, 1 February 1992 (1992-02-01), pages 1 - 8, XP000292350, ISSN: 0956-3776 * |
PATENT ABSTRACTS OF JAPAN vol. 017, no. 710 (E - 1484) 24 December 1993 (1993-12-24) * |
SIMON S: "Generalized run-length coding for SNR-scalable image compression", SIGNAL PROCESSING VII, THEORIES AND APPLICATIONS. PROCEEDINGS OF EUSIPCO-94. SEVENTH EUROPEAN SIGNAL PROCESSING CONFERENCE, PROCEEDINGS OF EUSIPCO-94 - 7TH EUROPEAN SIGNAL PROCESSING CONFERENCE, EDINBURGH, UK, 13-16 SEPT. 1994, 1994, Lausanne, Switzerland, Eur. Assoc. Signal Process, Switzerland, pages 560 - 563 vol.1, XP008007229 * |
YAN J K ET AL: "ENCODING OF IMAGES BASED ON A TWO-COMPONENT SOURCE MODEL", IEEE TRANSACTIONS ON COMMUNICATIONS, IEEE INC. NEW YORK, US, vol. 25, no. 11, 1 November 1977 (1977-11-01), pages 1315 - 1322, XP000644936, ISSN: 0090-6778 * |
Also Published As
Publication number | Publication date |
---|---|
US20040109609A1 (en) | 2004-06-10 |
RU2279189C2 (ru) | 2006-06-27 |
CN1498493A (zh) | 2004-05-19 |
EP1374559A1 (de) | 2004-01-02 |
JP3887664B2 (ja) | 2007-02-28 |
RU2003130966A (ru) | 2005-04-27 |
CA2441372C (en) | 2012-10-09 |
EP1374559B1 (de) | 2006-05-24 |
PT1374559E (pt) | 2006-10-31 |
ES2265500T3 (es) | 2007-02-16 |
CZ20032890A3 (cs) | 2004-01-14 |
JP2004534432A (ja) | 2004-11-11 |
ATE327636T1 (de) | 2006-06-15 |
CN1233146C (zh) | 2005-12-21 |
CA2441372A1 (en) | 2002-10-03 |
DE50206898D1 (de) | 2006-06-29 |
US7359560B2 (en) | 2008-04-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3005775C2 (de) | Kodierverfahren für ein Farbbild | |
DE69434862T2 (de) | Segmentierungs-basiertes entfernen von artefakten aus einem jpeg-bild | |
DE69937785T2 (de) | Verfahren zur Selektion von Farbblockpunkten für die Blockkodierung | |
DE60032689T2 (de) | Verfahren und Vorrichtung zur Bildkompression | |
DE69926469T2 (de) | Filterung von Bilddaten bei der Verarbeitung zusammengesetzter Dokumente | |
DE19531004C2 (de) | Verfahren und Vorrichtung zur wahrnehmungsoptimierten Übertragung von Video- und Audio-Daten | |
DE102016207230A1 (de) | Wahrnehmbare Farbumwandlungen für Videokodierung mit einem breiten Farbumfang | |
EP1371229B1 (de) | Verfahren zur komprimierung und dekomprimierung von videodaten | |
EP1404113A1 (de) | Verfahren zur automatischen Bearbeitung digitaler Bilddaten | |
EP1374559B1 (de) | Verfahren zur komprimierung und dekomprimierung von bilddaten | |
EP3434015B1 (de) | Datenkompression mittels adaptiven unterabtastens | |
DE60033716T2 (de) | Verfahren und Vorrichtung zur Bilddatenkompression | |
DE69820148T2 (de) | Verfahren zur Kompression/Dekompression von Bilddaten | |
DE112018002432T5 (de) | Verfahren und Vorrichtung zum Reduzieren von Artefakten in einem projektionsbasierten Rahmen | |
DE69934385T2 (de) | Bilddatenkompression für Verarbeitung zusammengesetzter Dokumente | |
DE10152612B4 (de) | Verfahren zur Komprimierung und Dekomprimierung von Bilddaten | |
EP2294825B1 (de) | Vorrichtung und verfahren zum codieren und decodieren einer mehrzahl von fliesskommawerten | |
DE2460654A1 (de) | Verfahren und einrichtung zum codieren eines gegebenen informationssignals | |
DE19944213C1 (de) | Verfahren zum Komprimieren eines digitalen Bildes mit mehreren Bit-Ebenen | |
EP1034511B1 (de) | Verfahren zur umsetzung digitaler daten im raster einer ersten auflösung in digitale zieldaten einer zweiten auflösung | |
DE69934774T2 (de) | Videoverarbeitung in pc verwendet statistisch abgestimmte farbwürfel | |
DE69828019T2 (de) | Verfahren und Vorrichtung zur iterativen Bildtransformation und -dekodierung | |
DE60311946T2 (de) | Verfahren und Vorrichtung zur Bilddateienglättung | |
EP0929975A1 (de) | Verfahren und anordnung zur vektorquantisierung und zur inversen vektorquantisierung eines digitalisierten bildes | |
WO1992017981A1 (de) | Verfahren zur kompression von bilddaten |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SL TJ TM TN TR TT TZ UA UG US UZ VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2002727252 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2002576416 Country of ref document: JP Ref document number: 2441372 Country of ref document: CA Ref document number: 028069269 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: PV2003-2890 Country of ref document: CZ |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10472288 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 2002727252 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: PV2003-2890 Country of ref document: CZ |
|
WWG | Wipo information: grant in national office |
Ref document number: 2002727252 Country of ref document: EP |