Cel The objective of the PICA project was to produce an efficient compression scheme for photographic images. The algorithm had to be capable of compressing a colour picture to 1 bit/pel or less while retaining good quality, allowing a full-frame videotex picture to be stored in only 32 Kbytes of memory and to be transmitted in 4 seconds on the Integrated Services Digital Network (ISDN). The final goal of the project was to gain acceptance of the algorithm as a standard. The objective of the project was to produce an efficient compression scheme for photographic images. The algorithm had to be capable of compressing a colour picture to 1 bit/pixel or less while retaining good quality, allowing a full frame videotex picture to be stored in only 32 Kbytes of memory and to be transmitted in 4 s on the integrated services digital network (ISDN). The final goal of the project was to gain acceptance of the algorithm as a standard.Innovative compression algorithms were developed and tested and then compared with known ones. Good results were achieved, with compression values meeting, and in some cases exceeding, the target of 1 bit/pel. Following the first year's work, a patent application was made for a new technique for vector quantization. British Telecommunications has been developing a new technique, known as recursive binary nesting, and a patent was filed during the second year.Innovative compression algorithms were developed and tested and then compared with known ones. Good results were achieved, with compression values meeting, and in some cases exceeding, the target of 1 bit/pel. Following the first year's work, a patent application was made for a new technique for vector quantisation by CSELT. BT has been developing a new technique, known as Recursive Binary Nesting, and a patent was filed during the second year. Exploitation PICA submitted two compression algorithms to the ISO/CCITT Joint Photographic Experts Group (JPEG) for standardisation and one of them, the ADCT, was ranked first out of 12 during the first evaluation exercise. Early in 1988, the PICA project achieved itsgoal when ISO selected the PICA-ADCT algorithm for development into a standard. Excellent results in terms of image quality were achieved using compression ratios of 21:1, and at 16:1 the decoded image is indistinguishable from the original except to the trained eye. At 64:1 the image can still be recognised and could be used, for example, for the quick scanning of photographic archives. The agreed high-compression technique should stimulate the market for photovideotex services in the 1990s. Dziedzina nauki inżynieria i technologiainżynieria materiałowabarwyinżynieria i technologiainżynieria elektryczna, inżynieria elektroniczna, inżynieria informatycznainżynieria informacyjnatelekomunikacja Program(-y) FP1-ESPRIT 1 - European programme (EEC) for research and development in information technologies (ESPRIT), 1984-1988 Temat(-y) Data not available Zaproszenie do składania wniosków Data not available System finansowania Data not available Koordynator British Telecom plc (BT) Adres British telecom laboratories martlesham heath IP5 7RE Ipswich Zjednoczone Królestwo Zobacz na mapie Wkład UE Brak danych Uczestnicy (6) Sortuj alfabetycznie Sortuj według wkładu UE Rozwiń wszystko Zwiń wszystko Centre Commun d'Études de Télécommunications et de Télédiffusion (CCETT) Francja Wkład UE € 0,00 Adres 4 rue du clos courtel 35510 Cesson-sevigne Zobacz na mapie Środki z innych źródeł Brak danych Centro Studi e Laboratori Telecomunicazioni SpA Włochy Wkład UE € 0,00 Adres Via g. reiss romoli, 274 10148 Torino Zobacz na mapie Linki Strona internetowa Opens in new window Środki z innych źródeł Brak danych Independent Broadcasting Authority (IBA) Zjednoczone Królestwo Wkład UE € 0,00 Adres Crawley court SO21 2QA Winchester Zobacz na mapie Środki z innych źródeł Brak danych KTAS-KOBENHAVNS TELEFON AKTIESELSKAB Dania Wkład UE € 0,00 Adres Noerregade 1199 Koebenhavn Zobacz na mapie Środki z innych źródeł Brak danych PTT RESEARCH TELEMATICA LABORATORIUM Niderlandy Wkład UE € 0,00 Adres St.paulusstraat postbus 421 2260 AK Leidschendam Zobacz na mapie Środki z innych źródeł Brak danych SIEMENS-NIXDORF INFORMATIONSSYSTEME AG Niemcy Wkład UE € 0,00 Adres Wittestraße 1000 Berlin Zobacz na mapie Środki z innych źródeł Brak danych