JPEG vs JPG
JPEG lossis-j.webp
Ntau txog JPEG
JPEG cov duab yog nyob rau hauv raster graphics duab cov ntaub ntawv hom chav kawm, uas tsim cov duab los ntawm ib tug bitmap los yog dot matrix network ntawm pixels. Tus qauv JPEG txhais lub CODEC (Coder - Decoder) kom code cov duab mus rau hauv byte kwj thiab txiav txim siab byte kwj los tsim cov duab. Hauv coding lub lossy compression hla / cia mus, cov ntsiab lus los ntawm cov duab kom txo cov ntaub ntawv loj ntawm qhov nyob ntawm qhov compression yog yuav tsum tau. Lub degree ntawm kev nthuav dav poob yog los ntawm kev sib pauv ntawm qhov loj me thiab qhov zoo ntawm cov duab. JPEG tso cai rau 24-ntsis input ib pixel, uas ua rau cov duab tseeb xim thaum encoding. Hauv feem ntau JPEG cov ntaub ntawv, ICC xim profile yog kos, xws li sRGB lossis Adobe RGB.
Cov hom ntawv JPEG ua tau zoo tshaj plaws nrog cov duab tiag tiag lossis cov duab nrog kev hloov pauv, xim du thiab tonal. Txawm li cas los xij, nws qhov kev ua tau zoo qis dua rau cov kab duab xws li logos, cov ntawv sau, thiab cov duab tas luav, uas muaj qhov hloov pauv sai sai ntawm cov xim hla cov kab pixels. Tsis tas li ntawd, JPEG tsis haum rau cov duab uas tau rov qab kho cov digital. Ib qho kev nthuav dav yuav ploj txhua zaus thaum compression thiab decompression ua tiav. Yog li ntawd, nws tsis haum rau cov duab, uas yuav tsum tau precision thiab siab daws teeb meem, xws li cov duab scientific, cov duab kuaj mob, thiab navigational charts.
Xyoo 1992 tso tawm ntawm JPEG Hloov Hloov Hom (JIF) ua rau qee qhov teeb meem siv tau thiab kom kov yeej cov kev tsis txaus no, ob peb lwm cov qauv tau qhia tom qab. JPEG/File Interchange Format (JFIF) thiab JPEG/Exchangeable Image File Format (JPEG/Exif) yog hom JPEG feem ntau siv. JFIF yog hom ntawv uas siv ntau tshaj plaws rau lub ntiaj teb thoob plaws lub vev xaib, thaum JPEG / Exif yog hom siv ntau tshaj plaws rau cov koob yees duab digital thiab cov duab kho duab digital.
JPEG cov ntaub ntawv siv ntau yam ntaub ntawv txuas ntxiv.-j.webp
