個人認為: vw
q Y;7 TV distortion一般會小於2%且屬於負畸變,那光學畸變當然有正有負,以照相機來說2~3%人眼還可以接受,如果超過5%人眼就會察覺~~~一點淺見
文天祥
2005-09-15 00:49
再補充說明: g|3FJA/ 在規格書上看到的TV distortion是傳送到螢幕的變形量。
xiaoniu
2005-09-15 17:19
distortion与TV distortion有一定的关联吧!?
puxinghai
2005-11-07 15:08
应该是畸变的一种,只是专门针对TV的,对TV有一个指标而已
puxinghai
2005-11-07 15:09
也就是说你要将畸变控制在一个范围以内
davidchao61
2005-11-30 18:09
Optical distortion是所計算絕對的值, T xwZ3E TV distortion是在sreen上所的得到的相對值,只care max 及 min的差異, *}i.,4+y 因為數碼容易調整。 78+PG(Q_M TV distortion與optical distortion會依不同視場定義不同。
转一个光学设计论坛里的帖子 tcf>9YsOr Bq]eNq 在光学设计中有人经常碰到这样的问题,光学镜头的指标中有两项对于畸变的要求 uD''0G\ %<8lLRl 一个是DISTORTION,另一个是TV DISTORTION l;SqjkN uN1O(s 其中的TV 畸变很多人不知道它的含义,再此给大家提供以下信息供参考,看了之后TV 畸变的概念就很清楚了 V}kZowWD .qCD(XZ+ xeX Pc7JG y++[:M What is distortion? XaV h. Distortion is the ratio of the change between the center and edge areas of a captured image. Due to the aberration of the lens, the distortion is more noticeable at the edges of a captured image. There are two types of distortion: barrel distortion and pincushion distortion. The general rule is that when the absolute value of the distortion value is smaller, the lens offers higher accuracy. 5[Yzi> o[ Q=%1@ ,x" Calculating formula *.J)7~(P TV distortion (Dtv) = Δh/2h x 100 (%) PSQ5/l?\> A positive value of TV distortion indicates b}9Ry" pincushion distortion and a negative value _$?SK id|o indicates barrel distortion. n
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