Yuav Ua Li Cas Ua Daim Duab Me?
Hauv ntiaj teb Hauv ntiaj teb digital niaj hnub no, cov duab ua lub luag haujlwm tseem ceeb hauv peb lub neej txhua hnub. Peb feem ntau pom peb tus kheej nrog qhov xav tau txo qhov loj ntawm daim duab hloov nws mus rau txawv platforms, xws li kev tes hauj lwm, nplooj ntawv web lossis daim ntawv thov mobile. Hmoov zoo, muaj ntau yam txuj ci thiab cov cuab yeej uas tso cai rau peb ua txoj haujlwm no yooj yim thiab ua tau zoo. Hauv kab lus no, peb yuav qhia koj qee qhov kev xaiv muaj los txo qhov loj los ntawm ib daim duab, yog li koj tuaj yeem kho nws raws li koj xav tau.
1. Compress cov duab tsis poob zoo
Ib qho kev txhawj xeeb tseem ceeb thaum txo qhov loj ntawm daim duab yog kom tsis txhob poob qhov zoo thiab qhov zoo ntawm daim duab. Hmoov zoo, muaj cov txheej txheem compression uas tso cai rau peb txo qhov loj ntawm daim duab tsis cuam tshuam qhov pom kev zoo. Compression tsis poob qhov zoo yog ua tiav siv compression algorithms xws li JPEG2000 lossis PNG-24. Cov hom ntawv no tuav a high quality thaum txo cov ntaub ntawv loj.
2. Rescale daim duab
Lwm qhov kev xaiv los ua ib daim duab me me yog cawm nws. Qhov no suav nrog kev hloov kho qhov ntev ntawm daim duab, txo nws qhov siab thiab dav. Ua li no, koj tuaj yeem siv cov duab kho kom zoo nkauj xws li Photoshop lossis GIMP, lossis koj tuaj yeem siv cov cuab yeej online uas tso cai rau koj rov kho cov duab sai thiab yooj yim. Thaum rescaling ib daim duab, nws yog ib qho tseem ceeb uas yuav tau xav txog qhov qub proportions ntawm daim duab kom tsis txhob muaj warping thiab tswj kom muaj qhov sib npaug ntawm qhov pom.
3. Hlais daim duab
Cov txheej txheem ntawm clipping Nws muaj kev xaiv ib feem ntawm daim duab thiab muab pov tseg. Qhov kev xaiv no muaj txiaj ntsig zoo thaum daim duab muaj cov ntsiab lus tsis tsim nyog lossis thaum koj tsuas yog xav ua kom pom qhov tshwj xeeb. Thaum cropping ib daim duab, nws yog ib qho tseem ceeb uas yuav tsum tau coj mus rau hauv tus account nws cov kev daws teeb meem thiab proportions, thiaj li tsis txhob txo nws loj heev thiab poob cov ntsiab lus tseem ceeb. Koj tuaj yeem siv duab kho kom raug cov kev pab cuam lossis online cov cuab yeej uas tso cai rau koj ua qoob loo cov duab rau koj cov kev xav tau.
Hauv kev xaus, txo qhov loj ntawm daim duab tuaj yeem ua haujlwm yooj yim yog tias koj paub cov txheej txheem tsim nyog. Nco ntsoov nco ntsoov nco ntsoov lub hom phiaj thiab kev siv uas koj yuav muab rau cov duab los xaiv cov txheej txheem tsim nyog tshaj plaws Txawm hais tias los ntawm compression tsis poob ntawm qhov zoo, rescaling ntawm daim duab los yog cropping, tam sim no koj npaj txhij los hloov koj cov duab rau txawv. platforms thiab xyuas kom muaj kev pom kev pom zoo. Tau koj txhais tes mus ua haujlwm thiab muab qhov loj me rau koj cov duab!
1. Cov duab txo qhov loj me: cov hauv paus thiab cov cuab yeej
Muaj ob peb lub laj thawj vim li cas koj yuav tsum tau txo qhov loj ntawm daim duab. Txawm hais tias nws yuav txuag tau qhov chaw ntawm koj lub cuab yeej, ua kom lub sijhawm thauj khoom ntawm nplooj ntawv web, lossis xa ntawm email, nws tseem ceeb kom nkag siab txog cov hauv paus thiab cov cuab yeej xav tau los "ua tiav" txoj haujlwm no. Ua ntej tshaj plaws, nws yog ib qho tseem ceeb kom nkag siab qhov ntawd Txo qhov loj ntawm ib daim duab qhia txo nws qhov kev daws teeb meem thiab cov ntaub ntawv loj. Qhov no txhais tau hais tias qee qhov pom kev zoo yuav raug txi, tab sis yog tias ua tiav, qhov tsis yooj yim no yuav tsawg thiab tsis tshua pom.
Ib qho cuab yeej siv ntau heev los txo qhov loj ntawm cov duab yog cov duab kho software xws li Adobe Photoshop lossis GIMP tso cai kho cov duab loj ntawm qib pixels, qhov ntev, lossis feem pua. Tsis tas li ntawd, cov cuab yeej no muab cov kev xaiv zoo tshaj plaws xws li cov ntaub ntawv compression los ua kom zoo dua cov ntaub ntawv loj yam tsis muaj kev cuam tshuam zoo rau kev pom. Los ntawm kev siv cov duab kho software, koj tuaj yeem tswj tau ntau dua ntawm cov txheej txheem thiab kho txhua qhov ntsuas raws li qhov xav tau tshwj xeeb ntawm daim duab.
Lwm txoj kev yooj yim dua thiab siv tau yooj yim dua los txo qhov loj me ntawm ib tug duab yog siv cov cuab yeej online. Muaj ntau lub vev xaib uas muab cov haujlwm no pub dawb, tsis tas yuav rub tawm ib qho program. Qee cov cuab yeej no tso cai rau hloov qhov loj ntawm daim duab los ntawm dragging thiab xa me nyuam rov xav tau cov ntaub ntawv, uas ntxiv simplifies tus txheej txheem. Cov cuab yeej no feem ntau muaj cov kev xaiv los xaiv cov zis hom thiab xav tau compression zoo. Thaum cov kev xaiv no yuav raug txwv ntau dua piv rau cov duab kho cov software, lawv yuav txaus rau feem ntau cov duab loj txo qhov xav tau.
2. Compress cov duab tsis poob qhov pom kev zoo
Nws yog ib qho haujlwm uas peb xav tau los txo qhov loj ntawm daim duab yam tsis muaj kev cuam tshuam nws qhov ntse. Hmoov zoo, muaj ntau yam txuj ci thiab cov cuab yeej uas tso cai rau peb ua tiav qhov no. zoo. Ib qho kev xaiv yog siv Lossless compression algorithms, uas txo qhov loj ntawm daim duab yam tsis tau tshem tawm cov ntaub ntawv lossis cov ntsiab lus pom. Cov algorithms no ua haujlwm los ntawm kev tshem tawm redundancies hauv cov duab cov ntaub ntawv, ua rau cov ntaub ntawv me me tsis cuam tshuam rau lawv qhov pom kev zoo.
Lwm qhov kev xaiv yog siv cov ntaub ntawv tawm tswv yim nrog compression tshwj xeeb, xws li JPEG lossis PNG. Cov hom ntawv no tuaj yeem xaiv cov duab cov ntaub ntawv, tswj kev pom zoo thaum txo cov ntaub ntawv loj. Piv txwv li, hom ntawv JPEG siv cov kev sib txuam compression algorithm uas tshem tawm cov ntsiab lus tsis tshua pom rau tib neeg lub qhov muag, tso cai rau cov duab loj kom txo qis.
Tsis tas li ntawd, muaj ntau yam cov cuab yeej thiab cov kev pab cuam muaj nyob online uas muaj cov duab compression xaiv. Cov cuab yeej no tso cai rau peb kho qhov zoo thiab qhov kawg ntawm cov duab compressed raws li peb xav tau. Ib txhia ntawm lawv txawm tso cai rau peb mus compress ntau cov duab nyob rau tib lub sijhawm, uas yog ib qho tseem ceeb thaum peb yuav tsum tau ua compression en masse Nws yog ib qho tseem ceeb kom nco ntsoov tias peb yuav tsum nrhiav qhov sib npaug ntawm qhov xav tau cov ntaub ntawv loj thiab qhov pom kev zoo uas peb txaus siab txi.
3. Optimization ntawm cov duab daws teeb meem thiab hom
Nws yog ib qho tseem ceeb uas yuav tau lees paub qhov ua tau zoo hauv cov duab ntawm cov khoom siv sib txawv thiab cov platforms. Qee zaum, peb pom peb tus kheej yuav tsum tau txo qhov loj ntawm daim duab yam tsis tau poob zoo, seb puas yuav txuag chaw cia lossis txhim kho qhov nrawm ntawm nplooj ntawv web.
Muaj ntau ntau cov tswv yim thiab cov cuab yeej muaj los ua kom daim duab me me yam tsis muaj kev cuam tshuam nws qhov zoo. Ib qho kev xaiv nrov yog siv cov duab compression, uas txo cov ntaub ntawv loj los ntawm kev tshem tawm cov ntaub ntawv tsis tu ncua thiab optimizing compression yam tsis tau poob zoo. Muaj cov software sib txawv thiab cov ntawv thov online uas tso cai rau koj los nthuav cov duab sai thiab yooj yim. Tsis tas li ntawd, nws tuaj yeem hloov kho qib compression kom pom qhov sib npaug ntawm qhov loj thiab qhov zoo.
Yog tias koj xav tau txo qhov loj ntawm daim duab ntau dua, lwm txoj hauv kev yog kho kev daws teeb meem thiab duab loj. Koj tuaj yeem ua qhov no siv cov duab kho cov kev pab cuam like Tsev av Photoshop los yog GIMP. Cov cuab yeej no tso cai rau koj hloov qhov kev daws teeb meem ntawm daim duab thiab kho nws qhov loj me hauv pixels lossis feem pua. Txawm li cas los xij, koj yuav tsum nco ntsoov qhov ntawd Kev txo qis ntau dhau ntawm kev daws teeb meem tuaj yeem cuam tshuam qhov zoo, tshwj xeeb tshaj yog nyob rau hauv cov ncauj lus kom ntxaws los yog muaj yeeb yuj duab.
4. Cov lus qhia kom txo qhov loj ntawm daim duab yam tsis muaj kev cuam tshuam cov ntsiab lus tseem ceeb
Tswv yim #1: Siv hom compression tsim nyog. Thaum nws los txog rau txo qhov loj ntawm daim duab, lub compression hom plays lub luag haujlwm tseem ceeb. Nws yog ib qho tseem ceeb uas yuav tau xaiv ib hom ntawv uas tso cai rau siab compression yam tsis muaj kev cuam tshuam cov duab zoo. Ib qho ntawm cov hom nrov tshaj plaws thiab muaj txiaj ntsig los txo qhov loj ntawm cov duab yog JPEG hom. Hom ntawv no siv compression algorithm uas tshem tawm cov ntaub ntawv rov qab los ntawm cov duab, yog li txo nws qhov loj me, Txawm li cas los xij, nws tseem ceeb heev uas yuav tsum nco ntsoov tias thaum siv cov compression siab, qee cov ntsiab lus thib ob yuav ploj. Yog li ntawd, nws yog advisable mus nrhiav ib tug sib npaug ntawm compression thiab duab zoo.
Tswv yim #2: Txo cov duab daws teeb meem. Lwm txoj hauv kev zoo los ua kom daim duab me me yam tsis muaj kev cuam tshuam cov ntsiab lus tseem ceeb yog txo nws txoj kev daws teeb meem. Kev daws teeb meem yog hais txog cov pixels uas tsim cov duab. Qhov ntau pixels ib daim duab muaj, qhov loj nws loj. Txo qhov daws teeb meem ntawm ib daim duab implies txo tus naj npawb ntawm pixels, uas nyob rau hauv lem txo nws loj. Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias kev txo qhov kev daws teeb meem kuj tseem txo cov kev nthuav dav pom hauv daim duab yog li ntawd, nws yog ib qho tsim nyog los nrhiav qhov sib npaug ntawm kev daws teeb meem thiab cov ntsiab lus uas koj xav kom pom.
Tswv yim #3: Siv cov cuab yeej kho duab. Muaj ntau ntau cov duab kho cov cuab yeej uas tso cai rau koj txo qhov loj ntawm cov duab yam tsis tau poob cov ntsiab lus tseem ceeb. Cov cuab yeej no feem ntau muaj kev xaiv compression thiab downsampling, nrog rau cov haujlwm ntxiv los kho qhov ci, qhov sib piv, thiab lwm yam ntawm daim duab. Thaum xaiv ib lub cuab yeej, nws yog ib qho tseem ceeb kom paub tseeb tias nws txhim khu kev qha thiab yooj yim rau siv. Qee cov ntawv thov nrov kho cov duab suav nrog Adobe Photoshop, GIMP thiab Canva. Nco ntsoov tias thaum siv cov cuab yeej no, nws yog ib qho tseem ceeb kom txuag tau ib daim ntawv theej ntawm cov duab qub yog tias koj xav rov qab hloov pauv.
5. Siv cov duab kho kom raug software los ua ib daim duab me me
Nrog rau kev nce qib ntawm thev naus laus zis, niaj hnub no peb muaj nyob rau ntawm peb qhov kev pov tseg ntau yam duab kho software uas tso cai rau peb ua qhov sib txawv thiab hloov kho rau peb cov duab. Ib qho kev hloov pauv uas peb tuaj yeem ua tau yog txo qhov loj ntawm daim duab, xws li txuag qhov chaw ntawm daim duab. peb lub cuab yeej los yog pab txhawb nws xa hauv internet. Hauv cov ntawv tshaj tawm no, peb yuav kawm paub siv cov duab kho kom raug software los ua cov duab me me hauv txoj kev yooj yim thiab ua tau zoo.
1. Compress cov duab: Ib txoj hauv kev zoo tshaj plaws los ua kom daim duab me me yog los ntawm compressing cov duab. Duab compression txo cov ntaub ntawv loj los ntawm kev tshem tawm cov ntaub ntawv tsis tsim nyog Muaj cov cuab yeej software sib txawv uas tso cai rau koj kom nthuav cov duab yooj yim thiab nrawm. Qee yam ntawm cov cuab yeej no tseem tso cai rau koj los kho cov qib compression kom pom qhov sib npaug zoo ntawm qhov zoo thiab cov ntaub ntawv loj.
2. Hloov kev daws teeb meem: Lwm qhov kev xaiv los ua ib daim duab me me yog los ntawm kev hloov nws qhov kev daws teeb meem. Qhov kev daws teeb meem ntawm ib daim duab yog hais txog cov pixels uas tsim cov duab. Qhov tsawg dua pixels, cov duab me dua yuav siv cov duab kho software, koj tuaj yeem txo qhov kev daws teeb meem ntawm daim duab los ntawm kev kho tus naj npawb ntawm pixels ib nti (ppi). Nws yog ib qho tseem ceeb kom nco ntsoov tias los ntawm kev txo qhov kev daws teeb meem, qhov zoo ntawm cov duab yuav raug cuam tshuam, yog li nws raug pom zoo kom ua ib qho thaub qab ua ntej ua cov kev hloov pauv no.
3. Crop daim duab: Yog tias koj xav tau ua ib daim duab me me tab sis tsis xav kom muaj kev cuam tshuam qhov zoo lossis kev daws teeb meem ntawm cov duab, koj tuaj yeem cog qoob loo. Siv cov duab editing software, koj tuaj yeem xaiv ib feem ntawm cov duab thiab qoob loo. Los ntawm kev tshem tawm ib feem ntawm daim duab, koj yuav txo nws qhov loj me yam tsis cuam tshuam rau nws qhov zoo. Qhov kev xaiv no muaj txiaj ntsig tshwj xeeb tshaj yog thaum koj muaj daim duab nrog cov khoom tseem ceeb lossis tus neeg thiab koj xav tshem tawm cov keeb kwm yav dhau los lossis cov ntsiab lus tsis tsim nyog. Nco ntsoov khaws daim ntawv theej ntawm daim duab qub ua ntej yuav hloov kho.
6. Advanced duab compression cov txheej txheem kom txo qhov loj me
Niaj hnub no, cov duab compression tau dhau los ua qhov tseem ceeb rau kev txhim kho kev cia thiab thauj khoom ceev ntawm cov vev xaib thiab cov ntawv thov mobile. Nyob rau hauv tsab ntawv no, peb yuav tshawb xyuas cov txheej txheem kev yees duab compression ua ntej uas tso cai rau koj kom txo qis qhov loj ntawm cov ntaub ntawv yees duab yam tsis tau txi lawv qhov pom kev zoo.
Ib qho kev siv tau zoo tshaj plaws yog kev siv lossless compression algorithms, xws li PNG cov ntaub ntawv compression algorithm. cov Qhov algorithm no siv cov txheej txheem coding uas tshem tawm qhov tsis txaus ntseeg thiab txo cov ntaub ntawv tsis tsim nyog hauv daim duab, tau txais qhov loj me uas tsis cuam tshuam rau qhov zoo ntawm cov duab qub.. Ib qho ua kom yuam kev ntxiv rau kev txhim kho compression yog ua kom zoo tom qab compression optimization, siv PNG optimization cov cuab yeej uas tshem tawm cov metadata thiab siv cov tswv yim txo qhov loj ntxiv.
Lwm txoj hauv kev zoo tshaj yog compression raws li Wavelet transform. Txoj kev no decomposes cov duab mus rau qhov sib txawv frequencies thiab kev daws teeb meem, tso cai kom compression zoo dua los ntawm kev tshem tawm cov ntsiab lus tsis tshua pom rau tib neeg lub qhov muag. JPEG 2000 cov ntaub ntawv hom yog ib qho ntawm cov qauv uas siv cov txheej txheem no thiab muab kev txo qis ntau dua yam tsis muaj kev txi ntau dhau. Raws li nrog PNG algorithm, cov txheej txheem tom qab compression tuaj yeem siv los tshem tawm cov kev rov ua dua ntxiv thiab txhim kho tus nqi compression ntxiv.
Thaum kawg, peb tuaj yeem siv qhov zoo ntawm WebP cov ntaub ntawv hom, tsim los ntawm Google. Hom ntawv no siv kev sib xyaw ua ke ntawm kev poob qis thiab kev poob qis, tso cai rau kev ua kom nruj me ntsis hauv cov duab nrog cov ntsiab lus tsis tshua muaj txiaj ntsig, tab sis tswj xyuas qhov pom kev zoo hauv thaj chaw tseem ceeb dua.. Tsis tas li ntawd, WebP muab kev txhawb nqa rau cov animations thiab transparencies, ua rau nws muaj ntau yam hom ntawv rau ntau hom web ntsiab lus. Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tau xav txog kev sib raug zoo nrog browsers thiab cov khoom siv ua ntej siv hom ntawv no. Nyob rau hauv cov ntsiab lus, cov kev yees duab compression siab heev yog cov cuab yeej muaj zog rau kev txo qhov loj me, tab sis nws yog ib qho tseem ceeb uas yuav tsum ua tib zoo soj ntsuam qhov ua rau pom qhov zoo thiab sib haum nrog cov ntsiab lus sib txawv.
7. Kev txiav txim siab tseem ceeb thaum txo qhov loj ntawm daim duab rau kev siv ntawm ntau lub platform thiab cov khoom siv
Kev Kho Duab Loj: Thaum nws los txog rau txo qhov loj ntawm daim duab rau kev siv ntawm ntau lub platforms thiab cov khoom siv, nws yog ib qho tseem ceeb kom nco ntsoov ntau yam tseem ceeb hauv siab. Ua ntej tshaj plaws, koj yuav tsum xaiv cov software tsim nyog los kho cov duab. Muaj ntau yam cuab yeej muaj nyob online uas tso cai rau koj los hloov cov duab. nraaj thiab meej. Tsis tas li ntawd, cov duab tsim nyog tshaj plaws rau txhua lub platform yuav tsum raug coj mus rau hauv tus account. Piv txwv li, hom JPEG yog siv dav thiab zoo tagnrho rau lub vev xaib vim nws muaj kev sib raug zoo ntawm qhov zoo thiab cov ntaub ntawv loj. Ntawm qhov tod tes, lub PNG ntawv hom Nws yog qhov zoo dua rau dluab nrog pob tshab thiab khaws cia zoo yam tsis muaj compression ntxiv.
Kev daws teeb meem thiab pixels: Thaum kho qhov loj ntawm daim duab, nws yog ib qho tseem ceeb uas yuav tau xav txog qhov kev daws teeb meem thiab pixels. Kev daws teeb meem yog hais txog tus lej pixels ib nti (ppi) thiab cuam tshuam ncaj qha rau qhov kawg ntawm daim duab. Feem ntau, qhov kev daws teeb meem ntawm 72 ppi yog txaus rau cov duab hauv lub vev xaib, thaum cov ntawv luam tawm zoo yuav xav tau qhov kev daws teeb meem ntawm 300 ppi Ntxiv rau, thaum hloov pauv cov duab, cov duab, nws yog qhov tseem ceeb kom muaj qhov sib npaug ntawm qhov pom zoo thiab cov ntaub ntawv loj . Kev txo tag nrho cov pixels tuaj yeem pab txo qhov loj ntawm daim duab, tab sis nws kuj tuaj yeem cuam tshuam tsis zoo rau qhov ntse thiab nthuav dav. Yog li ntawd, nws yog ib qho tseem ceeb kom nrhiav tau qhov tsim nyog kev sib haum xeeb uas ua tau raws li qhov yuav tsum tau muaj ntawm txhua lub platform thiab khoom siv.
Duab optimization: Duab optimization yog lwm qhov tseem ceeb rau kev txiav txim siab thaum txo cov duab loj. Duab compression tuaj yeem pab txo qhov chaw cia thiab txhim kho lub sijhawm thauj khoom ntawm nplooj ntawv web. Txawm li cas los xij, nws yog ib qho tseem ceeb kom nrhiav tau qhov sib npaug ntawm compression thiab duab zoo. Qee cov duab kho cov cuab yeej tso cai rau koj los kho qhov compression zoo kom pom qhov pom zoo yam tsis tas yuav nce cov ntaub ntawv loj. Tsis tas li ntawd, nws tuaj yeem txo qhov loj ntawm daim duab los ntawm kev tshem tawm cov ntaub ntawv tsis tsim nyog, xws li metadata, txheej, lossis qhov chaw ntawm cov duab uas tsis cuam tshuam qhov no tuaj yeem pab tswj cov ntaub ntawv sib dua yam tsis muaj kev cuam tshuam cov duab kawg. Hauv cov ntsiab lus, thaum txo qhov loj ntawm daim duab, nws yog ib qho tseem ceeb uas yuav tsum xaiv cov software tsim nyog, xav txog kev daws teeb meem thiab pixels, thiab ua kom zoo dua cov duab kom pom qhov sib npaug zoo ntawm qhov zoo thiab cov ntaub ntawv loj.
Kuv yog Sebastián Vidal, tus kws kho tshuab computer mob siab rau kev siv tshuab thiab DIY. Tsis tas li ntawd, kuv yog tus tsim tecnobits.com, qhov twg kuv qhia cov lus qhia ua kom siv thev naus laus zis ntau dua thiab nkag siab rau txhua tus.