JPEG XR
| JPEG XR | |
|---|---|
| Rasshirenie |
.jxr[1], .hdp[2], .wdp[2] |
| MIME-tip | image/jxr[3] i image/vnd.ms-photo[4] |
| Razrabotchik |
JPEG Microsoft |
| Opublikovan | 14 aprelia 2009 |
| Poslednii vypusk | 1.0 (2009-03-19) |
| Tip formata | Rastrovaia grafika |
| Rasshiren iz | HD Photo[vd] |
| Standart(y) |
ITU-T Rec. T.832, ISO/IEC 29199-2:2009 |
| Sait | jpeg.org/jpegxr/ |
| Mediafaily na Vikisklade | |
JPEG XR (ranee nazyvalsia HD Photo i Windows Media Photo) -- format kodirovaniia i failovyi format dlia fotografii, razrabotannyi i zapatentovannyi korporatsiei Microsoft.
Dannyi format podderzhivaetsia operatsionnoi sistemoi Windows Vista, a takzhe liuboi OS s ustanovlennym .NET Framework 3.0. On opredeliaet tsvetovye formaty dlia pechati i dlia otobrazheniia, kodirovanie tselochislennoi i s plavaiushchei zapiatoi dlia rasshireniia dinamicheskogo diapazona, optsii szhatiia s poteriami i bez, effektivnoe dekodirovanie dlia mnogikh razreshenii i minimal'nye zatraty komp'iuternykh resursov dlia preobrazovaniia ili dekodirovaniia.
V tselom effektivnost' JPEG XR dovol'no vysoka: tak, pri 85%-m kachestve uzhe prakticheski otsutstvuiut artefakty. Pri sravnenii s JPEG 2000 na 85 % pri men'shem razmere faila JPEG XR daiot men'she artefaktov.
Dostoinstva:
- Bolee effektivnoe szhatie, chem JPEG, znachitel'no bystree otkryvaiutsia faily tekh zhe razmerov, chto i JPEG2000.
- Podderzhka 16bit pozvoliaet khranit' snimki s polnym okhvatom tsvetov razmerom znachitel'no men'she, chem TIFF.
- Vozmozhnost' lossless-szhatiia (szhatie bez poter', fail men'she analogichnogo PNG)
- Vozmozhnost' ispol'zovat' al'fa-kanal (prozrachnost').
- Mozhno ispol'zovat' ne tol'ko R8G8B8, no i drugie formaty, takie kak R32G32B32, YUV, CMYK.
- Standartizirovan ISO i ECMA dlia svobodnogo ispol'zovaniia.
- Korrektnoe otobrazhenie metadannykh (v JPEG2000 eto realizovano tol'ko na bumage).
- Podderzhivaiut: XnView; Capture One; Photoshop (cherez plagin Windows [1] i OS ping.X[5]).
- Podderzhka na nachal'nom urovne krupnymi proizvoditeliami programm dlia obrabotki fotografii otkryvaet bol'shie perspektivy razvitiia dannogo formata dlia osnovnykh platform.
Sm. takzhe
[pravit' | pravit' kod]Primechaniia
[pravit' | pravit' kod]- | Recommendation T.832 : Information technology - JPEG XR image coding system - Part 2: Image coding specification . International Telecommunication Union - Standardization sector (ITU-T) (16 marta 2008). Data obrashcheniia: 24 oktiabria 2009. Arkhivirovano iz originala 13 fevralia 2012 goda.
- | 1 2 Microsoft HD Photo Device Porting Kit Specification . Microsoft Corporation (7 noiabria 2006). Data obrashcheniia: 8 noiabria 2009. Arkhivirovano iz originala 13 fevralia 2012 goda.
- | http://www.iana.org/assignments/provisional-standard-media-types/provisional-standard-media-types.xhtml
- | TrID -- 2003.
- | JPEGXR Plug-in for Photoshop (Mac) . Microsoft Download Center. Data obrashcheniia: 23 avgusta 2016. Arkhivirovano 11 sentiabria 2016 goda.
