Nws tsis muaj ib lo lus teb rau lo lus nug no
Lub pixels ib nti (PPI) ntawm cov duab yog dab tsi lub npe pixel ntom thiab yog heev kuj pixels ntau npaum li cas koj yuav suav yog tias koj suav cov pixels, kab rov tav los ntsug, uas muaj nyob hauv ib nti ib zaug ntawm koj cov zaub.
Muaj ob peb lub laj thawj vim koj paub tias muaj pes tsawg pixels nyob hauv ib nti ntawm koj cov duab, tab sis feem ntau qhov no yog qhov yuav pab tau yog thaum koj sim xav txog tias ib daim duab ntawm koj qhov screen yuav zoo li cas rau ib qho screen txawv.
Lwm hom kev xav yog tias koj yuav tsum paub cov duab los yog lub tshuab luam ntawv PPI kom to taub tias loj npaum li cas los yog me me tus duab yuav tshwm tuaj thaum luam tawm, tab sis koj yeej tsis ua li qhov no. Ntxiv rau hauv qab no.
Muaj Tsis Muaj Ib Tug Teb rau Pixels ib ntu
Yog hais tias txhua pixels loj tib yam, pixels hauv ib nti yuav muaj pes tsawg tus paub tias muaj pes tsawg centimeters hauv ib nti (2.54) lossis ntau npaum li cas inches hauv ib txhais ko taw (12).
Txawm li cas los, pixels muaj ntau qhov sib txawv ntawm cov lus sib txawv , yog li cov lus teb yog 58.74 pixels ib nti ntawm 75 "4K lub TV, piv txwv li, thiab 440.58 pixels ib nti ntawm 5" Full HD smartphone.
Hauv lwm cov lus, pes tsawg pixels ib nti nyob ntawm qhov loj thiab daws teeb meem ntawm qhov screen koj tham txog, yog li ntawd peb yuav tau ua qee cov lej kom tau tus naj npawb koj nyob nraum tom qab rau koj li.
Yuav ua li cas los xam cov Pixels nyob rau hauv ib tug Inch
Ua ntej peb nkag mus rau hauv qhov ua tau zoo li kev ua lej siab (nws tsis yog, tsis txhob txhawj), peb tau ua haujlwm zoo rau koj rau ntau qhov kev qhia hauv Pixels Per Nceb Cov lus nyob hauv qab ntawm nplooj ntawv.
Yog tias koj pom koj cov duab PPI, tsiv mus rau Yuav Siv Koj Cov Pixels Naj Npawb Naj Npawb , tab sis yog tsis ua, peb mam li xam nws tawm ntawm no nrog ob peb kauj ruam zauv yooj yim.
Dab tsi koj yuav xav tau nyob rau hauv txhua rooj plaub yog tus kab pheeb ces kaum cov duab nyob hauv inches nrog rau kev daws teeb meem ntawm qhov screen . Tag nrho ob qho ntawm cov lej no muaj peev xwm nrhiav tau nyob rau ntawm cov lus qhia kev ntawm koj cov lus los yog ntaus ntawv.
Saib Yuav Ua Li Cas Nrhiav Cov Chaw Tsim Tshuaj Tshawb Xyuas Tech Tech Yog tias koj xav tau kev pab cuam khawb qhov no.
Ntawm no yog qhov kab zauv tag nrho rau koj tus lej txawj ntaw, tab sis hla dhau txoj hauv kev rau cov lus qhia:
ppi = (√ ( w ² + h ²)) / d... qhov twg ppi yog pixels ib nti koj nyob nraum sim nrhiav, w yog qhov dav daws hauv pixels, h yog qhov siab qhov teeb meem hauv pixels, thiab d yog kab pheeb ces kaum ntawm qhov screen hauv nti.
Yog tias koj pw thaum lub sijhawm ua haujlwm ntawm kev ua haujlwm hauv chav kawm zauv, ntawm no yog li cas koj ua li no nrog tus piv txwv ntawm 60 "4K (3840 x 2160) screen:
- Square qhov dav pixels: 3840² = 14,745,600
- Square qhov siab pixels: 2160² = 4,665,600
- Ntxiv cov lej ua ke: 14,745,600 + 4,665,600 = 19,411,200
- Nqa lub hauv paus ntawm tus lej: √ (19,411,200) = 4,405.814
- Faib tus lej ntawm qhov ntsuas kab pheeb ces kaum: 4,405,814 / 60 = 73.43
Hauv tsib lub kauj ruam, peb xam cov pixels hauv ib nti ntawm 60 "4K lub TV ua 73.43 PPI, txhua yam uas koj yuav tsum tau ua tam sim no rov qab cov 5 cov kauj ruam nrog koj cov zaub, siv koj lub screen qhov daws teeb meem thiab loj.
Yog li tam sim no koj paub koj cov duab PPI ... tab sis dab tsi zoo yog nws? Yog hais tias koj nyuam qhuav xav paub, koj ua tiav! Txawm li cas los xij, raws li peb tau ua hauv cov kev taw qhia saum toj no, feem ntau lub sij hawm ntaus ntawv los yog tso PPI yog thawj ob kauj ruam mus rau ib yam dab tsi ntau dua.
Yuav Siv Tau Koj Cov Pixels Naj Npawb Naj Npawb
Tam sim no hais tias koj paub koj lub vijtsam lossis lub tshuab ua PPI, nws yog lub sijhawm los muab coj los siv zoo.
Txiav txim seb Tus Cwj Pwm Duab Luam Yeej Yuav Rov Saib Dua Lwm Yam
Koj yuav tsim lossis hloov ib daim duab ntawm koj lub 17 "laptop nrog ib qho screen HD (129.584 PPI) tab sis paub tias koj tuaj yeem tso rau ntawm 84" 4K UHD zaub (52.45 PPI) hauv chav haujlwm tom ntej no.
Yuav ua li cas koj thiaj paub tias cov duab raug tsim loj txaus los yog muaj qhov kev nthuav dav zoo?
Yuav teb tau lo lus nug no, koj mam li xub paub txog PPI ntawm qhov cuab yeej los yog cov zaub uas koj xav paub txog . Peb kawm tau tias yuav ua li cas hauv nqe kawg, los yog koj pom ib los sis ob qho tib si hauv cov lus hauv qab no.
Koj yuav tsum tau paub txog cov kab rov tav thiab ntsug pixel ntawm koj tus duab . Koj tab tom tsim los yog kho kom haum rau nws ces nws yuav tsum yooj yim txaus kom pom hauv koj qhov kev pab cuam graphics.
Zoo li ua ntej, ntawm no yog tag nrho cov kev sib npaug yog tias koj nyob nraum inclined, tab sis cov lus qhia hauv qab no:
hsize = w / ppi vsize = h / ppi... qhov twg hsize thiab vsize yog daim duab qhov kab rov tav thiab ntsug ntawm qhov ntau thiab tsawg hauv feem ntu, ntsig txog, ntawm lwm cov duab, w yog qhov dav ntawm daim duab hauv pixels, h yog qhov siab ntawm daim duab hauv pixels, thiab ppi yog PPI lwm cov zaub.
Ntawm no yog li cas koj ua qhov no yog koj daim duab 950x375 pixels loj thiab cov lus koj npaj rau yog ib qho screen "4K (3840 x 2160) (52.45 PPI):
- Faib qhov dav los ntawm PPI: 950 / 52.45 = 18.11 "
- Faib qhov siab ntawm PPI: 375 / 52.45 = 7.15 "
Qhov no peb pom tau tias, tsis muaj teeb meem li cas "loj" los yog "me me" daim duab yuav tshwm nyob rau hauv koj lub screen, nrog pixel qhov loj me ntawm 950 x 300, qhov duab yuav tshwm los ua 18.11 "los ntawm 7.15" 84 "4K TV nws ' ll tau qhia rau.
Tam sim no koj tuaj yeem siv qhov kev paub ntawd raws li koj pom zoo ... tej zaum uas yog yam uas koj tau ua tom qab, los yog tej zaum uas tsis txaus txaus xav tias qhov 84 "screen yog roughly 73" thiab 41 "siab!
Txiav txim seb qhov Luaj li cas Tus Duab Ua Yeem Dua Tom Qab Tag Nrho Cov Cai
Zoo hmoo, koj tsis tas yuav xam koj cov cuab yeej los yog tso PPI los xyuas seb loj npaum li cas tus duab koj sau yuav nyob rau ntawm daim ntawv.
Txhua yam koj yuav tsum paub yog cov ntaub ntawv uas muaj nyob hauv daim duab nws tus kheej - txoj kab pixel qhov dav , qhov pixel feem nraim , thiab cov duab 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 pabcuam graphics.
Ntawm no yog cov sib npaug:
hsize = w / ppi vsize = h / ppi... qhov twg hsize thiab vsize yog daim duab cov kab rov tav thiab ntsug qhov ntau thiab tsawg hauv feem, ntsig txog, raws li lawv yuav tsum luam tawm, w yog qhov dav ntawm daim duab hauv pixels, h yog qhov siab ntawm daim duab hauv pixels, thiab ppi yog qhov PPI ntawm daim duab nws tus kheej.
Nov yog qhov koj ua qhov no yog tias koj daim duab 375x148 pixels loj thiab muaj PPI ntawm 72:
- Faib qhov dav los ntawm PPI: 375/72 = 5.21 "
- Faib qhov siab ntawm PPI: 148/72 = 2.06 "
Piv txwv tias koj tsis teev cov duab thaum lub sij hawm luam ntawv, cov duab yuav muab muag ntawm qhov loj ntawm 5.21 "los ntawm 2.06". Ua lej nrog tus duab koj muaj thiab sau tawm nws tawm - nws ua haujlwm txhua lub sijhawm!
Lus Cim: DPI daws koj lub tshuab luam ntawv tau teem caij, muab nws 300, 600, 1200, thiab lwm yam., Tsis cuam tshuam qhov luaj li cas uas daim duab luam tawm ntawm! Tus xov tooj no zoo ib yam li PPI thiab sawv cev ntawm "zoo" uas yog daim duab xa tuaj rau lub tshuab luam ntawv luam tawm, tiam sis yuav tsum tsis txhob muab tso nrog rau ntawm koj daim duab thooj nyiaj.
Pixels Ib Pua Cov Rooj
Raws li tau cog lus saum toj no, ntawm no yog peb qhov PPI "cheat sheet" uas yuav tsum cawm koj cov lej ntau kauj ruam uas peb tau qhia saum toj no.
| Loj (nyob rau hauv) | 8K UHD (7680x4320) | 4K UHD (3840x2160) | Tag nrho 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 |
Ntawm chav kawm, tsis yog txhua txhua yam khoom siv los yog tso tawm muaj raws nraim li 8K UHD , 4K UHD , lossis Full HD (1080p) . Ntawm no yog lwm lub rooj nrog ib tug xov tooj ntawm nrov nrov li nrog cov qauv uas tsis yog-qauv thiab lawv cov PPI:
| Ntaus ntawv | Loj (nyob rau hauv) | Kev daws teeb meem (x / y) | PPI |
|---|---|---|---|
| Chromebook 11 | 11.6 | 1366x768 | 135.094 |
| Chromebook Pixel | 12.9 | 2560 x 1700 | 238.220 |
| Chromebox 30 | 30 | 2560x1600 | 100.629 |
| Dell Chaw 8 | 8.4 | 1600x2560 | 359.390 |
| Dell Venue 11 Pro | 10.8 | 1920 x 1080 | 203.972 |
| Lub Npe Tseem Ceeb | 5.71 | 2560x1312 | 503.786 |
| Google Pixel | 5 | 1080x1920 | 440.581 |
| Google Pixel XL | 5.5 | 1440 x 2560 | 534.038 |
| Google Pixel 2 | 5 | 1920 x 1080 | 440.581 |
| Google Pixel 2 XL | 6 | 2880x1440 | 536.656 |
| Google Pixelbook | 12.3 | 2400 x 1600 | 234.507 |
| HTC One M8 / M9 | 5 | 1080x1920 | 440.581 |
| iMac 27 | 27 | 2560x1440 | 108.786 |
| iMac 5K | 27 | 5120x2880 | 217.571 |
| iPad | 9.7 | 768x1024 | 131.959 |
| iPad Mini | 7.9 | 768x1024 | 162.025 |
| iPad Mini Retina | 7.9 | 1536x2048 | 324.051 |
| iPad Pro | 12.9 | 2732x2048 | 264.682 |
| iPad Retina | 9.7 | 1536x2048 | 263.918 |
| iPhone | 3.5 | 320x480 | 164.825 |
| iPhone 4 | 3.5 | 640 x 960 | 329.650 |
| iPhone 5 | 4 | 640 x 1136 | 325.969 |
| iPhone 6 | 4.7 | 750x1334 | 325.612 |
| iPhone 6 Ntxiv | 5.5 | 1080x1920 | 400.529 |
| iPhone 7/8 | 4.7 | 1334x750 | 325.612 |
| iPhone 7/8 Plus | 5.5 | 1920 x 1080 | 400.528 |
| iPhone X | 5.8 | 2436x1125 | 462.625 |
| LG G2 | 5.2 | 1080x1920 | 423.636 |
| LG G3 | 5.5 | 1440 x 2560 | 534.038 |
| MacBook 12 | 12 | 2304x1440 | 226.416 |
| MacBook Cua 11 | 11.6 | 1366x768 | 135.094 |
| MacBook Cua 13 | 13.3 | 1440 x 900 | 127.678 |
| MacBook Pro 13 | 13.3 | 2560x1600 | 226.983 |
| MacBook Pro 15 | 15.4 | 2880x1800 | 220.535 |
| Nexus 10 | 10.1 | 2560x1600 | 298.898 |
| Nexus 6 | 6 | 1440 x 2560 | 489.535 |
| Nexus 6P | 5.7 | 1440 x 2560 | 515.300 |
| Nexus 9 | 8.9 | 2048x1536 | 287.640 |
| OnePlus 5T | 6.01 | 1080x2160 | 401.822 |
| Samsung Galaxy Note 4 | 5.7 | 1440 x 2560 | 515.300 |
| Samsung Galaxy Note 8 | 6.3 | 2960 x 1440 | 522.489 |
| Samsung Galaxy S5 | 5.1 | 1080x1920 | 431.943 |
| Samsung Galaxy S6 | 5.1 | 1440 x 2560 | 575.923 |
| Samsung Galaxy S7 | 5.1 | 2560x1440 | 575.923 |
| Samsung Galaxy S8 | 5.8 | 2960 x 1440 | 567.532 |
| Samsung Galaxy S8 + | 6.2 | 2960 x 1440 | 530.917 |
| Sony Xperia Z3 Tablet | 8 | 1920x1200 | 283.019 |
| Sony Xperia Z4 Tablet | 10.1 | 2560x1600 | 298.898 |
| Nto | 10.6 | 1366x768 | 147.839 |
| Nto 2 | 10.6 | 1920 x 1080 | 207.821 |
| Nto 3 | 10.8 | 1920 x 1080 | 203.973 |
| Nto Chaw | 13.5 | 3000 x 2000 | 267.078 |
| Ntug Pro | 10.6 | 1920 x 1080 | 207.821 |
| Surface Pro 3 | 12 | 2160x1440 | 216.333 |
| Surface Pro 4 | 12.4 | 2736x1824 | 265.182 |
Tsis txhob txhawj yog tias koj tsis pom koj lub daws teeb meem lossis ntaus ntawv. Nco ntsoov, koj tuaj yeem xam pes pixels hauv ib nti rau koj lub iPad, tsis hais qhov loj los yog qhov daws, siv cov lej peb tau piav los saum no.