作者: Lightersiu 時間: 2020-6-2 13:34 標題: Aspect ratio疑問
小弟好奇一問點解 21:9 會係 3440x1440 / 2560x1080 明明除出嚟唔係依個數
16:9 1440p 係 2560
32:9 1440p 係 5120
就係21:9個數唔啱
1440p 3360
作者: Archvictoros 時間: 2020-6-2 13:47
本帖最後由 Archvictoros 於 2020-6-2 13:59 編輯
回覆 1# Lightersiu
上網google你就明，超寬2K=準4K=3440x1440 3440x1440= marketing term= 營銷名字 你計算的是對的，只不過冇人會介意多de像素點。
Mathematically, 43:18 is correct. However, all monitors that resemble an ultrawide format are categorized as 21:9.
Btw, you can easily calculate the aspect ratio yourself:
All you need to do is to divide your horizontal and vertical resolution by the greatest common divisor (gcd) of your horizontal and vertical values.
E.g.:
1920x1080
gcd(1920,1080) = 120
1920 / 120 = 16
1080 / 120 = 9
=> 16:9
3440x1440
gcd(3440,1440) = 80
3440 / 80 = 43
1440 / 80 = 18
=> 43:18 (or in other words 21,5:9)
A true 21:9 1440p screen would be 3360x1440.
No idea why they don't just all use an aspect ratio of 21:9 tho - but oh well, as long as I get more pixels ;)
Source：https://en.wikipedia.org/wiki/21:9_aspect_ratio
https://www.reddit.com/r/ultrawi ... 0x1440_219_or_4318/
作者: Lightersiu 時間: 2020-6-2 15:38
回覆 2# Archvictoros
thx 好清晰，確實唔介意多啲pixel反正無蝕底，同埋視覺效果上影響好似都不大長啲短啲都未必分到
作者: ccchhhuuunnn 時間: 2020-6-3 12:21
因為實際係2.39:1
via HKEPC IR Pro 3.6.1 - iOS(3.0.0)