ʻAʻohe pane pololei i kēia nīnau
ʻO ka pixels i kēlā me kēia kenia (PPI) o ka hōʻike he mea ia i kapaʻia he pixel pika aʻo keʻano maoli o nā pixels āu e helu ai inā e heluʻoe i nā pixels, ākea a iʻole ke aniani, e noho nei i hoʻokahi'īniha ma kāu hōʻike.
Aia kekahi mau kumu no ka hoʻomaopopoʻana i ka nui o nā pika i loko o ka'īniha o kāu hōʻike, akāʻo ka mea maʻamau, he kōkua nui kēia i ka wā e ho'āʻo aiʻoe e noʻonoʻo i kahi e nānā ai ke kiʻi ma kāu pakuhi i kahiʻokoʻa'ē aʻe.
ʻO kekahi manaʻo maʻamau, he ponoʻoe eʻike i ka hōʻike a iʻole ka mea paʻi puke o PPI e hoʻomaopopo i kaʻikeʻana i kahi kiʻi nui a kiʻi liʻiliʻi paha i ka wā e paʻiʻia ai, akā,ʻaʻoleʻoe i loko o kēia hihia. Nui aʻe ma lalo.
ʻAʻohe'Ōlelo Hoʻolohe i Pixels per Inch
Inā like ka nui o nā pixeli a pau,ʻo ka pixels i loko o ka'īniha he helu iʻikeʻia e like me ka nui o hoʻokahi kenimika i hoʻokahi inisi (2.54) aʻo ka nui oʻeka i ka wāwae (12).
Eia naʻe, heʻokoʻa nā pixel ma nā hōʻike likeʻole , no laila, 58.74 pika piula ma kaʻonika ma kahi pālakile 75 "4K, no ka laʻana, a me 440.58 pixels ma ka'enehi ma kaʻikeʻoni 5" Full HD.
Ma nā hua'ē aʻe, ehia mau pika i kēlā me kēia kenia e pili ana i ka nui a me ka hoʻonāʻana o ka'ōkuhi āu e kamaʻilio nei, no laila, pono mākou e hana i kekahi math e loaʻa ai ka helu āu e hele nei no kāu.
Pehea e helu ai i nā Pixels i loko o ka Inch
Ma mua o kou komoʻana i kahi e nānā like i ka mathʻoi aʻe (ʻaʻole, hopohopoʻoe), ua hana mākou i ka hana paʻakikī noʻoe no nā hōʻike i ka Papa Pixels Per Inch ma lalo o kaʻaoʻao.
Ināʻikeʻoe i ka PPI o kāu hōʻike, e hele i kahi pehea e hoʻohana ai i kāu Pixels ma ka Inch Number , akā ināʻaʻole, e hoʻopukaʻia maʻaneʻi me kahi mau mākaukau māmā.
ʻO kāu mea e pono ai i kēlā me kēia hihia,ʻo ka nui o ka diagonal display in inches as well as the resolution of the screen . Loaʻaʻia kēia mau heluʻelua ma kaʻaoʻao kikowaena o kāu hōʻike a iʻole mea hoʻohana.
Eʻike pehea eʻike ai i kaʻike hoʻolahaʻike hana hana inā makemakeʻoe i ke noi eʻeli iho i kēia.
Eia ke ana hoʻohālike piha no nā'ōpili math savvy, akā e lele maʻamau i mua o kēlā me kēiaʻaoʻao no nā kuhikuhi step-by-step:
ppi = (√ ( w ² + h²)) d... ma kahi o ka ppi ke pixels i ka keneta e ho'āʻo neiʻoe e loaʻa, w ka haʻina ka laulā i nā pixels, h ka haʻuki kiʻekiʻe i nā pixels, aʻo d ka diagonal size o ka maka i ka'īniha.
Inā hiamoeʻoe i ka manawa o ka hana ma ka papa math, pehea kāu hanaʻana me kahi hiʻohiʻona o ke 60 "4K (3840x2160) pāʻani:
- E kau i nā pixels whānui: 3840² = 14,745,600
- Ke kū i ke kiʻekiʻe pixels: 2160² = 4,665,600
- E hoʻonui i kēlā mau huahelu: 14,745,600 + 4,665,600 = 19,411,200
- E lawe i ke kumuhāhā o kēlā helu: √ (19,411,200) = 4,405.814
- E mahele i kēlā helu ma ka helu diagonal: 4,405,814 / 60 = 73.43
I loko oʻelima mau mākoʻi pōkole,ʻike mākou i nā pixels i loko o ka'īnika ma kahi 60 "4K kelepona i 73.43 PPI.ʻO nā mea a pau e pono aiʻoe e hana i kēia manawa, e hana hou i kēlā mauʻanuʻuʻelima me kāu hōʻike, me ka hoʻonā a me ka nui o kāu pale.
No laila, keʻike neiʻoe i ka PPI hōʻikeʻike āu ... akā he aha ka maikaʻi? Inā 'oe makemake wale, ua hana' oe! Eia naʻe, e like me kā mākou i kuhikuhi ai i ka hoʻolauna mua,ʻo ka hapanui o ka manawa he polokalamu a he hōʻike PPI paha ka papa mua o nāʻanuʻuʻelua e hiki ai i kekahi meaʻoi aku.
Pehea e hoʻohana ai i kāu helu Pixels Per Inch
I kēia manawa uaʻikeʻoe i kāu pale a iʻole mea PPI, ua hiki i ka manawa e hoʻohana maikaʻi ai.
E hoʻoholo i kahi e nānā ai ka kiʻi nui i kekahi mea'ē aʻe
Hiki iāʻoe ke hana a hoʻoponopono i kahi kiʻi ma kāu pona 17 "me ka nānā HD (129.584 PPI) akā eʻikeʻoe e hōʻike anaʻoe ma kahi hōʻike 84" 4K UHD (52.45 PPI) ma ke keʻena i ka pule aʻe.
Pehea e hiki ai iāʻoe ke hōʻoia i ka hoʻonuiʻia o ke kiʻi a nui paha a iʻole ka kiko kiko'ī?
No ka paneʻana i kēia nīnau, ponoʻoe eʻike mua i ka PPI o ka mea hana a hōʻike paha āu eʻimi nei . Ua aʻo mākou pehea e hana ai i kēlā mahele hope, aiʻoleʻoe i loaʻa kahi helu aʻelua paha i ka papa ma lalo nei.
Ponoʻoe eʻike i nāʻano kaulike kaulike a me ke kaulike o kāu kiʻi . Ke hana a hoʻololi pahaʻoe i mea e maʻalahi ai ka huliʻana i kāu polokalamu kiʻi.
E like me ka wā ma mua, eia nā hoʻohālike piha inā makemakeʻoe, akā eia nāʻaoʻao i lalo:
hsize = w / ppi vsize = h / ppi... ma kahi o ka hzeze a me ka vsize ke kikowaena o nā kiʻi a me nā poʻomaʻu i loko o inkoki, ma kēlā me kēia hōʻike, w ka laulā o ke kiʻi ma nā pika, h ka kiʻekiʻe o ke kiʻi ma nā pixels, aʻo ka ppi ka PPI o kekahi hōʻike.
Eia keʻano āu e hana ai inā he 950x375 pixels ka nui aʻo ka hōʻike āu e hoʻolālā nei he 84 "4K (3840x2160) (52.45 PPI):
- E mahele i ka laulā ma o ka PPI: 950 / 52.45 = 18.11 "
- E mahele i ke kiʻekiʻe ma o ka PPI: 375 / 52.45 = 7.15 "
Maanei, ua hōʻike mākou i kēlā me kēia, inā paha eʻikeʻia ana ka "nui" a iʻole ka "liʻiliʻi" paha i ke kiʻi, me nā pika pika 950x375, eʻikeʻia he 18.11 "me 7.15" ma kēlā 84 "4K TV ' e hoikeia ma.
I kēia manawa, hiki iāʻoe ke hoʻohana i kēlāʻike e like me kouʻikeʻana he pono ... paha pahaʻo ia wale nō ka mea āu i hele mai ai, aʻaʻole paha i nui ka nānāʻana he 84 mau "pelekane he 73" āpau a 41 "kiʻekiʻe!
E hoʻoholo i ka nui o kahi kiʻi e paʻi ma ka hoʻopiʻi piha
Pōmaikaʻi,ʻaʻole ponoʻoe e noʻonoʻo i kāu polokalamu a iʻole hōʻike PPI no kaʻike i ka nui o ke kiʻi āu e paʻi ai ma ka pepa.
ʻO nā mea a pau e pono aiʻoe eʻike,ʻo ia kaʻike i loko o ka kiʻi pono'ī - ka pixel pika pika , ke pika pika pixel , a me ka PPI o ke kiʻi .
Loaʻa nā'āpanaʻikeʻekolu a pau ma nā kiʻi o ka kiʻi e hiki ai ke loaʻa iāʻoe ma kāu polokalamu hoʻoponopono kiʻi.
Eia nā equations:
hsize = w / ppi vsize = h / ppi... ma kahi o ka hzeze a me ka vsize o ke kiʻi o ka kiʻi me ka laulā a me ke kaulike o ke kiki, e like me ka mea e paiʻia ai,ʻo ka whānui o ke kiʻi ma nā pika, h ka kiʻekiʻe o ke kiʻi ma nā pixels, aʻo ka ppi ka ʻO ka PPI o ke kiʻi pono'ī.
Eia keʻano āu e hana ai inā he 375x148 pixels ka nui a loaʻa iāʻoe he PPI o 72:
- E mahele i ka laulā ma o ka PPI: 375/72 = 5.21 "
- E mahele i ke kiʻekiʻe ma o ka PPI: 148/72 = 2.06 "
Ke manaʻo neiʻaʻoleʻoe e kau i kēia kiʻi i ka wā o ka paʻiʻiaʻana, e paʻiʻia ke kiʻi i 5.21 "ma 2.06". E hana i ka pākī a me kahi kiʻi āu a laila e paʻi - e hana mau i kēlā me kēia manawa!
Nānā: Aia ka hoʻonohonoho DPI i kāu hoʻonohonoho hoʻonohonoho, ma 300, 600, 1200, a me nā mea'ē aʻe,ʻaʻole e pili i ka nui i paʻiʻia ke kiʻi ma! Ua like loa kēia helu me PPI a ua hōʻailonaʻia ka "kūpono" i paʻiʻia ai ka kiʻi i hoʻouna i ka mea paʻi me kaʻole pono e hoʻokomoʻia ma keʻano he mahele o kāu helu helu.
Pixels Per Inch Papa
E like me ka'ōlelo i'ōleloʻia ma luna nei, eia kā mākou PPI "cheat sheet" e mālama iāʻoe i ka pākuhi maha-nui i hōʻikeʻia ma luna.
| Nui (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 |
ʻOiai,ʻaʻole nā mea a pau a iʻole ka hōʻike ma waho, aia 8K UHD , 4K UHD , a iʻole Full HD (1080p) . Eia kekahi papa'ē aʻe me nāʻano loea maikaʻi me nā kūlana kūponoʻole a me kā lākou PPI pili pono:
| Device | Nui (i) | Hoʻoholo Resolution (x / y) | PPI |
|---|---|---|---|
| Chromebook 11 | 11.6 | 1366x768 | 135.094 |
| Chromebook Pixel | 12.9 | 2560x1700 | 238.220 |
| ʻO Chromebox 30 | 30 | 2560x1600 | 100.629 |
| Dell Venue 8 | 8.4 | 1600x2560 | 359.390 |
| Naniʻo Dell 11 Pro | 10.8 | 1920x1080 | 203.972 |
| Kelepona kūpono | 5.71 | 2560x1312 | 503.786 |
| ʻO Google Pixel | 5 | 1080x1920 | 440.581 |
| ʻO Google Pixel XL | 5.5 | 1440x2560 | 534.038 |
| ʻO Google Pixel 2 | 5 | 1920x1080 | 440.581 |
| ʻO Google Pixel 2 XL | 6 | 2880x1440 | 536.656 |
| ʻO Google Pixelbook | 12.3 | 2400x1600 | 234.507 |
| Nokia Lumia 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 Mini | 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 | 400,500 |
| iPhone 7/8 | 4.7 | 1334x750 | 325.612 |
| iPhone 7/8 Plus | 5.5 | 1920x1080 | 400,500 |
| 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 |
| Kelepona 10 | 10.1 | 2560x1600 | 298.898 |
| Kelepona 6 | 6 | 1440x2560 | 489.535 |
| Helu 6P | 5.7 | 1440x2560 | 515.300 |
| ʻO ke kelepona 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 |
| Nokia Lumia | 5.1 | 1080x1920 | 431.943 |
| Nokia S6 | 5.1 | 1440x2560 | 575.923 |
| Nokia S7 | 5.1 | 2560x1440 | 575.923 |
| Samsung S8 | 5.8 | 2960x1440 | 567.532 |
| Nokia S8 + | 6.2 | 2960x1440 | 530.917 |
| Sony Xperia Z3 Papa | 8 | 1920x1200 | 283.019 |
| Nokia Xperia Z4 | 10.1 | 2560x1600 | 298.898 |
| ʻAno | 10.6 | 1366x768 | 147.839 |
| ʻAla 2 | 10.6 | 1920x1080 | 207.821 |
| ʻAla 3 | 10.8 | 1920x1080 | 203.973 |
| PukaʻIke | 13.5 | 3000x2000 | 267.078 |
| Sur Pro | 10.6 | 1920x1080 | 207.821 |
| ʻO ke kahe 3 | 12 | 2160x1440 | 216.333 |
| ʻO ke Kalana 4 | 12.4 | 2736x1824 | 265.182 |
Mai hopohopo ināʻaʻoleʻoe i loaʻa i kāu hoʻoholo a iʻole pūnaewele paha. E hoʻomanaʻo, hiki iāʻoe ke helu i ka nui o nā pixels i loko o ke inisi no kāu polokalamu, no ka nui a iʻole ka hopena, e hoʻohana ana i ka pākuhi i hōʻikeʻia ma luna nei.