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發表於 2012-12-18 01:12:55
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回復 chnplayer #1 的帖子
When we using Manual lens in NEX body, we also use "Focus peaking" function to assist.
'Focus Peaking' is a real time facility of current Sony mirrorless NEX cameras that shows the user the areas in focus in the scene currently being displayed. To illustrate how 'Focus Peaking' works I tried to reproduce the process in Photoshop. It is quite simple, so I see no reason why any mirrorless camera could not implement it.
To detect in-focus areas in an image is just a matter of detecting microcontrast (i.e. fine detail), something these cameras already need to do in their AF system.
Starting from any real time capture:
The simplest way to detect microcontrast is through a high pass filter (HPF). In the areas in focus, the detail will trigger a threshold set in the HPF, while out of focus areas wont's do so for being totally blurred in terms of high spatial frequencies.
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樓主: Keroro88
在線雷達
發表於 2012-12-17 00:38:58
都影得好清
發表於 2012-12-17 00:43:23
Very nice photos ...CONTAX一向低玩
有個幾凸下
鏡頭影出黎好細緻, 呢個二手價抵玩喎~
在下買唔起是也！
