Kaore he whakautu tika ki tenei patai
Ko nga pika i ia inihi (PPI) o te whakaaturanga ko te mea e kiia ana ko te pika pika me te tino ahua o nga pika ka taea e koe ki te tatau i nga pika, te whakapae, te poutete ranei, kei roto i te kotahi inihi kei runga i to whakaaturanga.
He maha nga take i mohio ai koe ki te maha o nga pixels kei roto i te inihi o to whakaaturanga, engari ko te nuinga o tenei ka tino awhina i a koe e ngana ana ki te whakaaro i te ahua o te ahua i runga i to mata hei tirotiro rereke.
Ko tetahi atu whakaaro ko te hiahia me mohio koe ki te whakaatu, ki te PPI ranei o te kaituhi kia mohio ai ka puta mai te ahua nui, iti ranei ka puta mai, engari kaore koe i roto i tenei take. He maha ake i runga.
Kaore he Whakautu kotahi ki nga Pixels ia Inch
Mena he rahi te rahi o nga pika katoa, ko nga pika i roto i te inihi he tohu e mohiotia ana me pehea te nui o te haurua ki te inihi (2.54) ranei te maha o nga inihi i roto i te waewae (12).
Engari, he rereke nga pika i runga i nga whakaaturanga rereke , na ko te whakautu he 58.74 pika i ia inihi i runga i te pouaka whakaata 75 "4K, hei tauira, me te 440.58 pika i ia inihi i runga i te 5" Full HD atamai mata.
I etahi atu kupu, e hia nga pika i ia inihi ka pau i te rahi me te whakaoti o te mata e korero ana koe, na, ka mahihia e koe tetahi pakihi kia whiwhi ai koe i te tau kei muri ia koe.
Me pehea te Taatau i nga Pixels i roto i te Inch
I mua i to matou whakauru ki te ahua o te mathiki matatau (kaore, kaore e manukanuka), kua mahi matou i te mahi pakeke mo koe mo etahi whakaaturanga i te Pixels Per Inch Table i raro o te whārangi.
Mena ka kitea e koe te PPI o to whakaaturanga, haere ki te pehea te Whakamahia o Pixels mo ia Taurau Inch , engari ki te kore, ka whakaatuhia e matou i konei ki etahi waahanga poto matatiki.
He aha nga mea e hiahiatia ana e koe i tetahi keehi ko te rahi whakaatu i roto i nga inihi tae atu ki te whakataunga o te mata . Ka kitea enei o enei tau i runga i nga waahanga hangarau hangarau o to whakaaturanga.
Tirohia Me pehea te Rapu Kaihanga Hangarau Hangarau mehemea ka hiahia koe ki te awhi i tenei.
Koinei te whārite katoa mo koe mo te hunga matakite matatini, engari ka rere ki mua i nga tohutohu taahiraa-i--taahiraa:
ppi = (√ ( w ² + h²)) / d... kei hea te pihi pika i ia inihi e ngana ana koe ki te kimi, w ko te whanui whanui kei roto i nga pika, h ko te teitei teitei i roto i nga pika, a ko d te rahi o te mata i roto i te inihi.
Mena ka moe koe i te wa o te waahanga o te waahanga mahi i roto i te akomanga matatini, kei konei koe me te tauira o te mata 60 "4K (3840x2160)
- Tapahia nga pika whanui: 3840 ² = 14,745,600
- Tapahia te pikaunga teitei: 2160² = 4,665,600
- Tāpirihia aua tau: 14,745,600 + 4,665,600 = 19,411,200
- Tangohia te pakiaka tapawha o taua tau: √ (19,411,200) = 4,405.814
- Wawehia taua tau na te mahinga mata mataara: 4,405,814 / 60 = 73.43
I roto i nga haahi poto poto e rima, i tohuhia e matou nga pika i roto i te inihi i runga i te pouaka whakaata 60 "4K hei 73.43 PPI. Me mahi ano koe i enei waahanga e rima me to whakaaturanga, te whakamahi i te whakatau me te rahi o to mata.
Na inaianei ka mohio koe ki to PPI whakaaturanga ... engari he aha te pai? Mena he manene noa koe, kua oti koe! Heoi, no te mea kua tohua e matou ki te whakauru i runga ake nei, ko te nuinga o te waa he waahi, he whakaaturanga PPI ranei te tuatahi o nga taahiraa e rua ki te whiwhi ki tetahi mea nui atu mahi.
Me pehea te Whakamahia o Pixels Ia Tau Tauiho
I tenei wa e mohio ana koe ki to matapihi, i to taputapu PPI ranei, ko te wa pai ki te whakamahi i te pai.
Whakatauhia pehea te ahua nui o tetahi ahua ka titiro ki tetahi atu Pūrere
Ka taea e koe te waihanga, te whakatika ranei i tetahi ahua ki to rorohiko 17 "me te mata HD (129.584 PPI), engari ka mohio ka whakaatu koe i runga i te 84" 4K UHD whakaatu (52.45 PPI) i te tari i muri mai.
Me pehea e taea ai e koe te mohio kei te hanga nui te whakapakoko, kei te tika ranei te taipitopito?
Hei whakautu i tenei patai, me tino hiahia koe ki te mohio ki te PPI o te taputapu, ki te whakaatu ranei e mohio ana koe . I ako matou ki te mahi i tera i te waahanga whakamutunga, i kitea ranei e koe tetahi tau e rua ranei kei roto i te ripanga i raro nei.
Me mohio ano koe ki nga waahanga whakapae me te poutū o to pikitia . Kei te hanga koe, kei te whakatika ranei kia pera me te mea ohie kia kitea i roto i to mahere whakairoiro.
I mua i tenei wa, ko nga whaitaka katoa tenei mehemea kei te hiahia koe, engari kei raro nei nga tohutohu:
hsize = w / ppi vsize = h / ppi... kei hea te huka me te raukahu ko te rahi o te pikitia me te poutū i roto i te inihi, i runga i tetahi atu whakaatu, w ko te whanui o te ahua i nga pika, h ko te teitei o te ahua i nga pika, ko te ppi te PPI o te whakaatu atu .
Tenei te pehea e mahia ana e koe mēnā ko te whakaahua 950x375 te rahi me te whakaaturanga kei te whakamahere koe he 84 "4K (3840x2160) mata (52.45 PPI):
- Wahia te whanui e te PPI: 950 / 52.45 = 18.11 "
- Wahia te teitei e te PPI: 375 / 52.45 = 7.15 "
I konei i whakaaturia e matou, ahakoa te ahua o te "nui", te "iti" ranei o te ahua kei runga i to mata, me nga pika pikapa o 950x375, ka puta te ahua 18.11 "na 7.15" i runga i taua 84 "4K TV te reira ' Ka whakaaturia i runga.
Na, ka taea e koe te whakamahi i taua matauranga e pai ana koe ... pea ko te mea noa tena i muri ia koe, i te mea kaore pea i te nui te nui o te whakaaro he 84 "matapihi he 73" puta noa i te 41 "te roa!
Te whakatau i te Rahi Atahanga Ka Patuhia i te Whakatau Katoa
Kia hari, kaore e hiahia ana koe ki te whakaaro i to whakaaro, i te whakaaturanga PPI ranei hei whakaatu i te ahua nui o te ahua ka tuhia e koe ki te pepa.
Ko nga mea katoa e hiahia ana koe ki te mohio ko nga korero kei roto i te ahua ake - te pika whakapae pikaunga , te teitei pika poutū , me te PPI o te whakapakoko .
Ko nga raraunga katoa e toru e wātea ana i nga ahua o te ahua ka taea e koe te kitea i roto i to raupapa whakarereke whakairoiro.
Tenei nga whārite:
hsize = w / ppi vsize = h / ppi... kei hea te hiku me te raupapa o te ahua o te whakapakoko me te rahi o te pou i roto i te inihi, i te waa, ka taataihia, w ko te whanui o te ahua i nga pika, h ko te teitei o te ahua i nga pika, a ko te ppi ko te PPI o te ahua ano.
Tenei te pehea e mahi ai koe mehemea ko te kii 375x148 nga pihi me te PPI o 72:
- Wahia te whanui e te PPI: 375/72 = 5.21 "
- Wahia te tiketike e te PPI: 148/72 = 2.06 "
Ki te whakaaro kaore koe e taurite i te ahua i te wa e tukatukahia ana, ka peita te ahua ki te rahi o te 5.21 "ma te 2.06". Whakamahia te pakihi me te ahua ka whai koe, ka whakaputahia - ka mahi i nga wa katoa!
Tuhipoka: Ko te whakataunga DPI kua tautuhia to taituhi ki a koe, kia 300, 600, 1200, me etahi atu, kaore e pa ana ki te rahi e tuhia ana te whakapakoko! He rite rawa tenei tau ki te PPI me te tohu i te "kounga" e tuhia ai te ahua ki te kaituhi engari kaua e whakaurua hei waahanga o to tatauranga rahi o to whakapakoko.
Pixels Per Te Tae Inch
Ka rite ki te korero i runga nei, ko to tatou PPI "pepa tinihanga" tenei hei tiaki ia koe i te mathitanga maha-taahiraa i whakaaturia ki runga.
| Rahi (i) | 8K UHD (7680x4320) | 4K UHD (3840x2160) | Full 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 |
Ko te tikanga, kaore nga whakaaro katoa e whakaatu ana i reira he 8K UHD , 4K UHD , Full HD (1080p) ranei . Tenei tetahi atu ripanga ki te maha o nga whakaaro rongonui me nga whakataunga kore-paerewa me o ratou PPI kua whakaritea:
| Pūrere | Rahi (i) | Te whakataunga (x / y) | PPI |
|---|---|---|---|
| Chromebook 11 | 11.6 | 1366x768 | 135.094 |
| Chromebook Pika | 12.9 | 2560x1700 | 238.220 |
| Chromebox 30 | 30 | 2560x1600 | 100.629 |
| Dell Venue 8 | 8.4 | 1600x2560 | 359.390 |
| Dell Venue 11 Pro | 10.8 | 1920x1080 | 203.972 |
| Waea Nui | 5.71 | 2560x1312 | 503.786 |
| Pika Google | 5 | 1080x1920 | 440.581 |
| Google Pixel XL | 5.5 | 1440x2560 | 534.038 |
| Google Pika 2 | 5 | 1920x1080 | 440.581 |
| Google Pixel 2 XL | 6 | 2880x1440 | 536.656 |
| Google Pixelbook | 12.3 | 2400x1600 | 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 | 640x960 | 329.650 |
| iPhone 5 | 4 | 640x1136 | 325.969 |
| iPhone 6 | 4.7 | 750x1334 | 325.612 |
| iPhone 6 Plus | 5.5 | 1080x1920 | 400.529 |
| iPhone 7/8 | 4.7 | 1334x750 | 325.612 |
| iPhone 7/8 Plus | 5.5 | 1920x1080 | 400.528 |
| iPhone X | 5.8 | 2436x1125 | 462.625 |
| LG G2 | 5.2 | 1080x1920 | 423.636 |
| LG G3 | 5.5 | 1440x2560 | 534.038 |
| MacBook 12 | 12 | 2304x1440 | 226.416 |
| MacBook Air 11 | 11.6 | 1366x768 | 135.094 |
| MacBook Air 13 | 13.3 | 1440x900 | 127.678 |
| MacBook Pro 13 | 13.3 | 2560x1600 | 226.983 |
| MacBook Pro 15 | 15.4 | 2880x1800 | 220.535 |
| Te nohonga 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 5T | 6.01 | 1080x2160 | 401.822 |
| Samsung Galaxy Note 4 | 5.7 | 1440x2560 | 515.300 |
| Samsung Galaxy Note 8 | 6.3 | 2960x1440 | 522.489 |
| Samsung nga tupuni S5 | 5.1 | 1080x1920 | 431.943 |
| Samsung nga tupuni S6 | 5.1 | 1440x2560 | 575.923 |
| Samsung nga tupuni S7 | 5.1 | 2560x1440 | 575.923 |
| Samsung nga tupuni S8 | 5.8 | 2960x1440 | 567.532 |
| Samsung Galaxy S8 + | 6.2 | 2960x1440 | 530.917 |
| Sony Xperia Z3 Tablet | 8 | 1920x1200 | 283.019 |
| Sony Xperia Z4 Ripanga | 10.1 | 2560x1600 | 298.898 |
| Mata | 10.6 | 1366x768 | 147.839 |
| Mata 2 | 10.6 | 1920x1080 | 207.821 |
| Mata 3 | 10.8 | 1920x1080 | 203.973 |
| Puka Puka | 13.5 | 3000x2000 | 267.078 |
| Matawai Ahu | 10.6 | 1920x1080 | 207.821 |
| Waehau 3 | 12 | 2160x1440 | 216.333 |
| Matawai 4 | 12.4 | 2736x1824 | 265.182 |
Kaua e āwangawanga mēnā kāore i kitea e koe tō whakataunga, tō taputapu rānei. Kia mahara, ka taea e koe te tatau i te maha o nga pika i roto i te inihi mo to whakaaro, ahakoa te rahi, te whakatau ranei, ma te whakamahi i te math i whakaahuatia i runga nei.