Lub pixels ib nti ntawm cov zaub yog dab tsi hu ua pixel ntom lossis PPI. Nws yog qhov ntsuas ntawm pes tsawg pixels koj yuav suav yog tias koj suav cov pixels, kab rov tav lossis ntsug, uas muaj nyob hauv ib nti ntawm koj cov zaub.
Tam sim no koj paub koj cov zaub PPI… tab sis nws zoo li cas? Yog tias koj tsuas yog xav paub, koj ua tiav! Txawm li cas los xij, raws li peb tau hais hauv cov lus qhia saum toj no, feem ntau ntawm cov khoom siv lossis tso saib PPI yog thawj zaug ntawm ob kauj ruam kom tau txais qee yam ua tau zoo dua.
Tsis muaj ib lo lus teb rau Pixels ib nti
Yog tias tag nrho cov pixels loj tib yam, cov pixels hauv ib nti yuav yog tus lej paub zoo li pes tsawg centimeters hauv ib nti (2.54) lossis pes tsawg nti hauv ko taw (12).
Txawm li cas los xij, pixels yog qhov sib txawv ntawm qhov sib txawv, yog li cov lus teb yog 58.74 pixels ib nti ntawm 75-nti 4K TV, piv txwv li, tab sis 440.58 pixels ib nti ntawm 5 -nti puv HD smartphone screen.
Hauv lwm lo lus, pes tsawg pixels ib nti nyob ntawm qhov loj thiab kev daws teeb meem ntawm lub vijtsam koj tab tom tham, yog li peb yuav tau ua qee qhov lej kom tau tus lej koj tom qab rau koj li.
Yuav ua li cas xam cov Pixels hauv ib nti
Ua ntej peb nkag mus rau qhov zoo li kev ua lej siab tshaj (nws tsis yog, tsis txhob txhawj), peb tau ua haujlwm nyuaj rau koj rau ntau cov lus qhia hauv Pixels Ib Nti Table hauv qab ntawm nplooj ntawv.
Yog tias koj pom koj cov zaub PPI, txav mus rau Yuav Ua Li Cas Siv Koj Lub Pixels Ib Ntiag Tug Naj Npawb, tab sis yog tias tsis yog, peb mam li xam nws tawm ntawm no nrog ob peb kauj ruam yooj yim lej.
Yam koj yuav xav tau dab tsi yog kab pheeb ces kaum loj hauv ntiv tes nrog rau qhov kev daws teeb meem ntawm qhov screenOb tus lej no tuaj yeem pom ntawm nplooj ntawv qhia tshwj xeeb ntawm koj cov zaub lossis khoom siv. Saib peb nplooj ntawv yuav ua li cas thiaj nrhiav tau cov chaw tsim khoom tech txhawb cov ntaub ntawv yog tias koj xav tau kev pab khawb qhov no.
Ntawm no yog qhov sib npaug tag nrho rau koj cov neeg txawj lej lej, tab sis hla dhau nws mus rau cov lus qhia ua ntu zus:
ppi=(√(w²+h²))/d
…qhov twg ppi yog pixels ib nti koj tab tom sim nrhiav, w yog qhov dav daws teeb meem hauv pixels,h yog qhov siab daws teeb meem hauv pixels, thiab d yog kab pheeb ces kaum ntawm lub vijtsam hauv ntiv tes.
Yog tias koj pw thaum lub sijhawm ua haujlwm tshooj hauv chav lej, ntawm no yog qhov koj ua qhov no nrog piv txwv ntawm 60 4K (3840x2160) screen:
- Square the width pixels: 3840²=14, 745, 600
- Square the height pixels: 2160²=4, 665, 600
- Ntxiv cov lej ua ke: 14, 745, 600 + 4, 665, 600=19, 411, 200
- Tau lub hauv paus ntawm tus lej ntawd: √(19, 411, 200)=4, 405.814
- faib tus lej los ntawm kab pheeb ces kaum ntsuas ntsuas: 4, 405, 814 / 60=73.43
Hauv tsib kauj ruam luv luv, peb xam cov pixels hauv ib nti ntawm 60 4K TV ua 73.43 PPI. Txhua yam koj yuav tsum ua tam sim no yog rov ua cov tsib kauj ruam nrog koj cov zaub, siv koj lub vijtsam daws teeb meem thiab qhov loj me.
Tam sim no koj paub koj cov zaub PPI… tab sis nws zoo li cas? Yog tias koj tsuas yog xav paub, koj ua tiav! Txawm li cas los xij, raws li peb tau hais hauv cov lus qhia saum toj no, feem ntau ntawm cov khoom siv lossis tso saib PPI yog thawj zaug ntawm ob kauj ruam kom tau txais qee yam ua tau zoo dua.
Txiav txim siab seb daim duab loj npaum li cas yuav saib ntawm lwm lub cuab yeej
Tam sim no koj paub koj lub vijtsam lossis lub cuab yeej PPI, nws yog lub sijhawm los muab nws siv zoo.
Koj tuaj yeem tsim lossis kho cov duab ntawm koj lub laptop 17-nti nrog lub vijtsam HD (129.584 PPI) tab sis paub tias koj yuav tso tawm ntawm 84-nti 4K UHD zaub (52.45 PPI) hauv chaw ua haujlwm lub lim tiam tom ntej.
Yuav ua li cas koj thiaj paub tseeb tias cov duab tau tsim loj txaus lossis muaj qhov nthuav dav?
Yuav teb lo lus nug no, koj yuav tsum xub paub PPI ntawm lub cuab yeej lossis tso saib uas koj xav paub txog. Peb kawm yuav ua li cas thiaj ua tau li ntawd hauv ntu kawg, lossis koj pom ib lossis ob tus lej hauv cov lus hauv qab no.
Koj tseem yuav tsum paub kab rov tav thiab ntsug pixel qhov ntev ntawm koj daim duab. Koj tab tom tsim lossis kho kom nws yuav tsum yooj yim txaus los nrhiav hauv koj qhov kev pab cuam duab.
Zoo li ua ntej, ntawm no yog tag nrho qhov sib npaug yog tias koj xav tau, tab sis cov lus qhia hauv qab no:
hsize=w/ppi
vsize=h/ppi
…qhov twg hsize thiab vsize yog cov duab kab rov tav thiab ntsug qhov ntau thiab tsawg hauv nti, feem, ntawm lwm cov zaub,w yog qhov dav ntawm cov duab hauv pixels, h yog qhov siab ntawm cov duab hauv pixels, thiab ppi yog PPI ntawm lwm cov zaub.
Nov yog qhov koj ua qhov no yog tias koj cov duab yog 950x375 pixels loj thiab cov zaub koj npaj rau yog 84-nti 4K (3840x2160) screen (52.45 PPI):
- faib qhov dav los ntawm PPI: 950 / 52.45=18.11 ntiv tes
- Sib faib qhov siab los ntawm PPI: 375 / 52.45=7.15 ntiv tes
Ntawm no peb tau pom tias, txawm li cas los xij "loj" lossis "me" daim duab yuav tshwm sim rau ntawm koj lub vijtsam, nrog pixel qhov ntev ntawm 950x375, cov duab ntawd yuav tshwm sim 18.11 "los ntawm 7.15" ntawm 84 -inch 4K TV nws yuav tshwm rau ntawm.
Tam sim no koj tuaj yeem siv qhov kev paub ntawd raws li koj pom zoo - tej zaum yog qhov koj tau ua tom qab, lossis tej zaum qhov ntawd tsis loj txaus xav tias qhov screen 84-nti yog kwv yees li 73 ntiv hla thiab 41 ntiv tes siab!
Txiav txim siab qhov loj me ib daim duab yuav luam tawm ntawm kev daws teeb meem tag nrho
Koj tsis tas yuav suav koj lub cuab yeej lossis tso saib PPI kom pom tias daim duab loj npaum li cas koj luam tawm ntawm daim ntawv.
Txhua yam koj yuav tsum paub yog cov ntaub ntawv uas muaj nyob rau hauv daim duab nws tus kheej - kab rov tav pixel qhov ntev, qhov ntsug pixel qhov ntev, thiab lub duab's PPI Tag nrho peb daim ntawm cov ntaub ntawv muaj nyob hauv daim duab cov khoom uas koj tuaj yeem pom hauv koj qhov kev pab cuam kho duab kos duab.
Ntawm no yog qhov sib npaug:
hsize=w/ppi
vsize=h/ppi
…qhov twg hsize thiab vsize yog cov duab kab rov tav thiab ntsug qhov ntau thiab tsawg hauv ntiv tes, raws li lawv yuav luam tawm, w yog qhov dav ntawm cov duab hauv pixels, h yog qhov siab ntawm cov duab hauv pixels, thiab ppiyog PPI ntawm daim duab nws tus kheej.
Nov yog qhov koj ua qhov no yog tias koj daim duab yog 375x148 pixels loj thiab muaj PPI ntawm 72:
- faib qhov dav los ntawm PPI: 375 / 72=5.21 ntiv tes
- faib qhov siab los ntawm PPI: 148 / 72=2.06 ntiv tes
Piv txwv tias koj tsis ntsuas cov duab thaum lub sijhawm luam ntawv, cov duab yuav raug luam tawm ntawm lub cev ntawm qhov loj ntawm 5.21 ntiv tes los ntawm 2.06 ntiv tes. Ua lej nrog cov duab koj muaj thiab tom qab ntawd luam tawm - nws ua haujlwm txhua zaus!
Qhov kev daws teeb meem DPI koj lub tshuab luam ntawv tau teeb tsa, yog nws 300, 600, 1200, thiab lwm yam, tsis cuam tshuam qhov loj me uas daim duab luam tawm ntawm! Tus lej no zoo ib yam li PPI thiab sawv cev rau "zoo" uas cov duab xa mus rau lub tshuab luam ntawv luam tawm nrog tab sis yuav tsum tsis txhob muab suav nrog ua ib feem ntawm koj cov duab loj xam.
Pixels Ib Nti Tables
Raws li tau cog lus tseg saum toj no, ntawm no yog peb PPI "daim ntawv dag" uas yuav tsum txuag koj cov lej ntau kauj ruam uas peb tau qhia saum toj no.
| PPI Cheat Sheet | |||
|---|---|---|---|
| Size (hauv) | 8K UHD (7680x4320) | 4K UHD (3840x2160) | YFull HD (1920x1080) |
| 145 | 60.770 | 30.385 | 15.192 |
| 110 | 80.106 | 40.053 | 20.026 |
| 85 | 103.666 | 51.833 | 25.917 |
| 84 | 104.900 | 52.450 | 26.225 |
| 80 | 110.145 | 55.073 | 27.536 |
| 75 | 117.488 | 58.744 | 29.372 |
| 70 | 125.880 | 62.940 | 31.470 |
| 65 | 135.564 | 67.782 | 33.891 |
| 64.5 | 136.614 | 68.307 | 34.154 |
| 60 | 146.860 | 73.430 | 36.715 |
| 58 | 151.925 | 75.962 | 37.981 |
| 56.2 | 156.791 | 78.395 | 39.198 |
| 55 | 160.211 | 80.106 | 40.053 |
| 50 | 176.233 | 88.116 | 44.058 |
| 46 | 191.557 | 95.779 | 47.889 |
| 43 | 204.922 | 102.461 | 51.230 |
| 42 | 209.801 | 104.900 | 52.450 |
| 40 | 220.291 | 110.145 | 55.073 |
| 39 | 225.939 | 112.970 | 56.485 |
| 37 | 238.152 | 119.076 | 59.538 |
| 32 | 275.363 | 137.682 | 68.841 |
| 31.5 | 279.734 | 139.867 | 69.934 |
| 30 | 293.721 | 146.860 | 73.430 |
| 27.8 | 316.965 | 158.483 | 79.241 |
| 27 | 326.357 | 163.178 | 81.589 |
| 24 | 367.151 | 183.576 | 91.788 |
| 23 | 383.114 | 191.557 | 95.779 |
| 21.5 | 409.843 | 204.922 | 102.461 |
| 17.3 | 509.343 | 254.671 | 127.336 |
| 15.4 | 572.184 | 286.092 | 143.046 |
| 13.3 | 662.528 | 331.264 | 165.632 |
| 11.6 | 759.623 | 379.812 | 189.906 |
| 10.6 | 831.286 | 415.643 | 207.821 |
| 9.6 | 917.878 | 458.939 | 229.469 |
| 5 | 1762.326 | 881.163 | 440.581 |
| 4.8 | 1835.756 | 917.878 | 458.939 |
| 4.7 | 1874.815 | 937.407 | 468.704 |
| 4.5 | 1958.140 | 979.070 | 489.535 |
Tau kawg, tsis yog txhua lub cuab yeej lossis tso tawm muaj raws nraim 8K UHD, 4K UHD, lossis Full HD (1080p). Nov yog lwm lub rooj nrog ntau cov khoom siv nrov nrog cov kev daws teeb meem tsis zoo thiab lawv cov PPI suav:
| PPIs rau cov khoom nrov nrov | |||
|---|---|---|---|
| Device | Size (hauv) | Resolution (x/y) | PPI |
| Dell Venue 11 Pro | 10.8 | 1920x1080 | 203.972 |
| Xov tooj tseem ceeb | 5.71 | 2560x1312 | 503.786 |
| Google Pixel 5a | 6.34 | 1080x2400 | 415.111 |
| Google Pixel 6 | 6.4 | 1080x2400 | 411.220 |
| Google Pixel 6 Pro | 6.7 | 1440x3120 | 512.877 |
| Google Pixelbook Go | 13.3 | 3840x2160 | 331.264 |
| HTC U12+ | 6.0 | 1440x2880 | 536.656 |
| HTC Wildfire E3 | 6.52 | 720x1560 | 263.518 |
| iMac 4.5K | 23.5 | 4480x2520 | 218.728 |
| iMac 5K | 27 | 5120x2880 | 217.571 |
| YiPad Mini Retina | 8.3 | 2266x1488 | 326.613 |
| YiPad Air | 10.9 | 2360x1640 | 263.659 |
| iPad Pro | 12.9 | 2732x2048 | 264.682 |
| iPhone 11 | 6.1 | 1792x828 | 323.614 |
| iPhone 13/12 Pro & 13/12 | 6.1 | 2532x1170 | 457.254 |
| iPhone 13 Pro Max | 6.7 | 2778x1284 | 456.773 |
| LG G8X ThinQ | 6.4 | 1080x2340 | 402.689 |
| LG Velvet | 6.8 | 1080x2460 | 395.093 |
| YMacBook 12 | 12 | 2304x1440 | 226.416 |
| MacBook Air 11 | 11.6 | 1366x768 | 135.094 |
| MacBook Air 13 | 13.3 | 1440x900 | 127.678 |
| YMacBook Pro (2020) | 13.3 | 2560x1600 | 226.983 |
| MacBook Pro (2021) | 16.2 | 3456x2234 | 254.023 |
| Nexus 10 | 10.1 | 2560x1600 | 298.898 |
| Nexus 6 | 6 | 1440x2560 | 489.535 |
| Nexus 6P | 5.7 | 1440x2560 | 515.300 |
| Nexus 9 | 8.9 | 2048x1536 | 287.640 |
| OnePlus 9 Pro | 6.7 | 3216x1440 | 525.921 |
| OnePlus Nord N200 | 6.49 | 1080x2400 | 405.517 |
| Samsung Galaxy Note 20 Ultra | 6.9 | 3088x1440 | 493.804 |
| Samsung Galaxy S21+ | 6.7 | 1080x2400 | 392.807 |
| Samsung Galaxy Tab S7+ | 12.4 | 1752x2800 | 266.367 |
| Samsung Galaxy Z Flip 3 | 6.7 | 2640x1080 | 425.726 |
| Samsung Galaxy Z Fold 3 | 7.6 | 2208x1768 | 372.187 |
| Sony Xperia 5 III | 6.1 | 1080x2520 | 449.455 |
| Surface Book 3 | 15 | 3240x2160 | 259.600 |
| Surface Go 3 | 10.5 | 1920x1280 | 219.767 |
| Surface Laptop Studio | 14.4 | 2400x1600 | 200.308 |
| Surface Pro 8 | 13 | 2880x1920 | 266.256 |
Tsis txhob txhawj yog tias koj tsis pom koj qhov kev daws teeb meem lossis lub cuab yeej. Nco ntsoov, koj tuaj yeem suav pes tsawg pixels nyob rau hauv ib nti rau koj lub cuab yeej, txawm tias qhov loj me lossis kev daws teeb meem, siv lej peb tau piav qhia saum toj no.
