He aha te kiko o te pika
Ko nga Pika mo ia inihi (PPI) he inenga o te pika pika (taumira) o nga taputapu i roto i nga momo horopaki: te nuinga o nga whakaaturanga rorohiko, matawai whakaahua, me nga whakaahua a te kaamera a tihi.
Ko te PPI o te whakaaturanga rorohiko e pa ana ki te rahi o te whakaaturanga inihi me te tapeke o nga pika i nga tohu whakapae me te poutū.
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He maha atu ano mo te pika pika
Mena kei te hiahia koe ki te tatau i te pika pika o to mata, me mohio koe: tatau pika whakapae me te poutū me to rahinga mata hauroki. Whakamahia tenei tauira, whakamahia ranei to taatau;)
\(
d_p = \sqrt{w^2 + h^2}
\)
\(
PPI = \dfrac{d_p}{d_i} \ \
\)
where
Mena kei te hiahia koe ki te mohio atu, tirohia tenei riipene ataata Awhina o te Rongo Ranga Rua i raro iho.
Te whakapainga hitori o te PPI (raarangi o nga taputapu)
Waea pukoro
Ingoa Pūrere |
Tika pika (PPI) |
Whakaaturanga taumira |
Rahi whakaatu (inihi) |
Tau i whakauruhia |
Hononga |
Motorola Razr V3 |
128 |
176 x 220 |
2.2 |
2004 |
|
iPhone (first gen.) |
128 |
320 x 480 |
3.5 |
2007 |
|
iPhone 4 |
326 |
960 x 640 |
3.5 |
2010 |
|
Samsung Galaxy S4 |
441 |
1080 x 1920 |
5 |
2013 |
|
HTC One |
486 |
1080 x 1920 |
4.7 |
2013 |
|
LG G3 |
534 |
1140 x 2560 |
5.5 |
2014 |
|
Papa
Ingoa Pūrere |
Tika pika (PPI) |
Whakaaturanga taumira |
Rahi whakaatu (inihi) |
Tau i whakauruhia |
Hononga |
iPad (first gen.) |
132 |
1024 x 768 |
9.7 |
2010 |
|
iPad Air (also 3rd & 4th gen.) |
264 |
2048 x 1536 |
9.7 |
2012 |
|
Samsung Galaxy Tab S |
288 |
2560 x 1600 |
10.5 |
2014 |
|
iPad mini 2 |
326 |
2048 x 1536 |
7.9 |
2013 |
|
Samsung Galaxy Tab S 8.4 |
359 |
1600 x 2560 |
8.4 |
2014 |
|
Whakaaturanga rorohiko
Ingoa Pūrere |
Tika pika (PPI) |
Whakaaturanga taumira |
Rahi whakaatu (inihi) |
Tau i whakauruhia |
Hononga |
Commodore 1936 ARL |
91 |
1024 x 768 |
14 |
1990 |
|
Dell E773C |
96 |
1280 x 1024 |
17 |
1999 |
|
Dell U2412M |
94 |
1920 x 1200 |
24 |
2011 |
|
Asus VE228DE |
100 |
1920 x 1080 |
27 |
2011 |
|
Apple Thunderbolt Display |
108 |
2560 x 1440 |
27 |
2011 |
|
Dell UP2414Q UltraSharp 4K |
183 |
3840 x 2160 |
24 |
2014 |
|