Ntau npaum li cas pixels hauv ib nti (PPI)?

Cov txheej txheem:

Ntau npaum li cas pixels hauv ib nti (PPI)?
Ntau npaum li cas pixels hauv ib nti (PPI)?
Anonim

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

Image
Image

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:

  1. Square the width pixels: 3840²=14, 745, 600
  2. Square the height pixels: 2160²=4, 665, 600
  3. Ntxiv cov lej ua ke: 14, 745, 600 + 4, 665, 600=19, 411, 200
  4. Tau lub hauv paus ntawm tus lej ntawd: √(19, 411, 200)=4, 405.814
  5. 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):

  1. faib qhov dav los ntawm PPI: 950 / 52.45=18.11 ntiv tes
  2. 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:

  1. faib qhov dav los ntawm PPI: 375 / 72=5.21 ntiv tes
  2. 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.

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