问个关于GH4的4K视频问题,怎么凑出来的800w的视频像素?
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[1 楼] 抓拍狂人
[泡菜]
14-2-7 20:54
4k约等于800w像素,但是传感器只有1600w,如果超采样,1600w像素不够,如果不超采样,那必然有一半的像素是闲置的,只用一半像素,根据使用的像素点之间距离应该相等的原则,可以断定gh4只用中间那800w像素?这样的话,拍4k的时候,相场还没有4/3寸大?是这样的么?或者如果不损失相场,用整片cmos录视频,难道松下是将1.414个像素合成一个像素?求解。
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[10 楼] ganzibang
[禁言中]
14-2-8 12:04
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[9 楼] Pillar1984
[泡菜]
14-2-7 23:55
兄弟,可能松下的官网弄错了,burst mode达不到40fps,raw输出下还是最快只有12fps。给个链接你看啊http://www.julur.com/forum/thread-292446-1-1.html |
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[8 楼] 虎落评阳
[资深泡菜]
14-2-7 22:16
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[7 楼] 抓拍狂人
[泡菜]
14-2-7 22:14
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[6 楼] Pillar1984
[泡菜]
14-2-7 21:52
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[5 楼] 抓拍狂人
[泡菜]
14-2-7 21:37
Pillar1984 发表于 2014-2-7 21:35 谢了,跟我想的一样。跟我的note3情况一模一样,用4k录得时候视角会比拍照小。 |
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[4 楼] Pillar1984
[泡菜]
14-2-7 21:36
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[3 楼] Pillar1984
[泡菜]
14-2-7 21:35
In order to get down to the 8.847MP of cinema 4K from the 4.6K full sensor (12MP in 16:9, 16MP in 4:3) the camera has to crop.
Cinema 4K mode video at 4096 x 2160 (1.85:1) is cut out of a 4680 x 2592 16:9 recording area (the full width of the sensor). The crop factor in 4K mode therefore is not 2x as is standard for Micro Four Thirds but approximately 2.3x (similar to the Blackmagic Cinema Camera). 系数约为2.3X,广角有损失,跟佳能1DC类似,没有全像素采样然后downscale,那样画质会变差 |
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[2 楼] Pillar1984
[泡菜]
14-2-7 21:33
EOS HD论坛有讲解
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