Hmong: Qhov sib txawv ntawm JPG thiab JPEG

* Tsis yog txhua daim duab hom ntawv yog ua kom sib npaug. Coob tus ntawm lawv tau tsim los daws teeb meem uas ib hom ntawv uas twb muaj lawm tsis tuaj yeem daws tau. JPEG, piv txwv li, tuaj txog vim tias cov duab ntau thiab tsawg tau noj txoj kev ntau dhau qhov chaw cia khoom. Nco tseg, JIF, JPEG, thiab JPG cov ntaub ntawv txuas ntxiv yog qhov qub. Txhawm rau kom nkag siab yog vim li cas cov ntaub ntawv hom muaj ntau lub npe, Kuv xav tau sau me ntsis ntawm keeb kwm me ntsis. JPEG [cov kws tshaj lij cov ntaub ntawv tau muaj npe tau npe tom qab pab pawg sub-pawg uas pab tsim lub JPEG kev sib pauv zoo (JIF) tus qauv. Xyoo 1992 los ntawm cov koom haum thoob ntiaj teb rau cov qauv (ISO).

* Jpegs yog 24-ntsis tseem raster duab, nrog yim qhov khoom hauv txhua channel ntawm RGB xim qauv. Qhov no tawm tsis muaj chav rau ib qho alpha channel, uas txhais tau tias thaum JPEGs tuaj yeem txhawb nqa 16 lab xim. Thaum tus duab tau txais kev cawmdim ua JPEG, cov duab yuav siv sijhawm 50-75% tsawg dua chaw cia khoom nrog me me poob hauv cov duab zoo. JPEG kev sib zog yog nyob ntawm cov duab uas hu ua cov tshuaj sib hloov pauv (DCT), uas tau npaj siab ua ntej ntawm hluav taws xob Nasir Ahmed hauv 1972.

* Koj tuaj yeem xav txog JIF cov ntaub ntawv yog ua JPEG hauv nws daim ntawv "purest". Tab sis cov hom ntawv tsis siv ntau lawm vim tias nws muaj kev txwv. Cov xim thiab pixel cov ntsiab lus ntawm JIF ua rau muaj teeb meem ntau yam. Ua tsaug ntau, cov teeb meem no tau hais los ntawm lwm cov qauv "ntxiv uas tau tsim los ntawm Jif. Qhov thib ib yog JPEG cov ntaub ntawv sib pab sib pauv (JFIF), thiab tom qab ntawd, cov duab sib pauv duab (EXIF) thiab ICC cov xim profiles.

* Tam sim no JPEG - JFIF yog cov hom ntawv nrov tshaj plaws rau khaws cia thiab xa cov duab hauv Is Taws Nem, thaum JPEG - Exif yog rau cov koob yees duab digital thiab lwm yam duab kos duab. Feem ntau cov neeg tsis paub qhov sib txawv ntawm cov no thiab hu rau lawv ob qho tib yam li jpeg.

* Hauv 2000, JPEG pawg tso lwm cov duab cov ntaub ntawv hu ua JPEG 2000 (nws cov ntaub ntawv txuas ntxiv yog JPG2 thiab JPF). Nws yog txhais tau tias yog ib tug tshaj ntawm JPEG. Txawm tias thaum nws nquag coj mus rau cov duab zoo dua. JPEG 2000 hom ntawv file flopped rau ib qho kev txhais tes me me ntawm cov laj thawj. Nws tau nyob ntawm tus lej tshiab thiab yog li tsis tau rov qab tau nrog JPEG. Thiab JPEG 2000 cov ntaub ntawv yuav tsum nco ntau dua los ua cov txheej txheem, uas yog ib qho kev sib txuas lus rov qab. Tom qab tag nrho, nruab nrab lub computer thaum lub sijhawm tsuas muaj txog 64 MB ntawm kev nco.

* JPEG 2000 tau pom me ntsis ntawm kev tawm tsam tam sim no uas yog kho vajtse lub computer, tab sis cov ntaub ntawv sau ua ntej dhau los. Tsuas yog Internet browser uas muaj kev txhawb nqa rau JPEG 2000 cov ntaub ntawv tam sim no yog SAFARI.

* Cov qauv thaum ntxov ntawm lub Windows muaj qhov tsawg tshaj plaws 3-tsab ntawv txwv thaum nws tuaj txog qhov ntev ntawm cov ntaub ntawv txuas ntxiv. JPEG yuav tsum tau ua kom luv rau JPG raws li tsis tshaj qhov txwv. Mac thiab Linux khoos phis tawm yeej tsis muaj ib yam ntxiv, thiab yog li cov neeg siv yuav txuas ntxiv txuag cov duab ua JPEG.

* Nrov duab kho cov kev kawm uas tau ua haujlwm thoob Photoshop thiab Gimp-tau teeb tsa lawv cov ntaub ntawv jpg txuas ntxiv mus rau qhov kev sim ua kom tsis meej pem. Thiab yog li cas peb xaus nrog ob cov ntaub ntawv txuas ntxiv rau tib hom ntawv: JPEG thiab JPG. Tsis muaj qhov sib txawv ntawm lawv.

* Qhov zoo dua ntawm ob lub jpeg vs. PNG: Lub JNG thiab PNG tau tso tawm hauv qhov teeb meem digital duab uas thev naus laus zis tau ntsib tom qab ntawd. Koj tuaj yeem hais tias tsuas yog ntuj uas lawv tau piv tas li ... thiab lawv yog, txawm rau hnub no.

* Ntawm Jpeg thiab PNG, uas cov duab ua ntaub ntawv hom reigns zoo tshaj? Cov lus teb nyob ntawm seb cov duab twg koj txuag tau. JPEGs yog qhov zoo dua rau cov duab vim tias lawv siv cov khoom lag luam poob qis ua kom cov ntaub ntawv tsim nyog. Cov duab yog cov duab loj loj, cov ncauj lus kom ntxaws ntxaws ntxaws heev rau cov khoom cuav tsis pom zoo heev rau lawv. Ntawm qhov tod tes, cov duab nrog cov ntsiab lus ntse, ploj mus, thiab thaj chaw loj ntawm ib xim tsis saib zoo heev thaum muab cov JPEG.

* Qhov no yog qhov twg lub network Portable network (PNG) yuav tuaj hauv. Tsim los ntawm PNEG kev txhawb nqa ntawm JPEG, PNG txhawb nqa cov ntaub ntawv poob tsis zoo thiab pob tshab. PNGs yog li feem ntau siv yog tias cov duab zoo yuav tsum tau khaws thiab cov ntawv loj tsis yog qhov teeb meem.

* Ntawm no yog txoj cai zoo ntawm tus ntiv tes xoo yog khaws jpeg rau cov duab, thiab txuag PNG rau cov duab nrog cov duab pob tshab thiab cov duab tsis yog duab. JPEG thiab JPG yog tib hom ntaub ntawv: txawm tias tsis meej pem lub JPEG tau ua rau nws ntau cov hloov tshiab thiab hloov txawv ntawm cov duab digital nyob rau hauv nruab nrab-90s tau tshwm sim los ntawm nws tso tawm. Yog li, lub sij hawm tom ntej koj npaj tau xa daim duab los ntawm cov duab editor thiab tau nthuav tawm nrog cov ntawv ntev ntawm muaj hom ntawv, tsuas yog nco ntsoov: JPG yog ib qho thiab ib yam.

Raws li ib txwm muaj, nyob hauv ib txwm, thiab muaj kev nyab xeeb!

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