Noise is random.

来源: pieq314 于 2007-02-22 11:06:46 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (341 bytes)
回答: You need to add signals first. 由 pieq314 于 2007-02-22 10:38:53

For example, at a certain pixel, assume its signal is 100 and noise is 10 in one photo (so total value on that pixel is 110). On a second photo, the signal is still going to be 100, but noise could be -5, so that the total value for that pixel is 95.

When you add the two photos, you get the pixel value of 205 (signal 200, noise 5).

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• i see, thanks! -lilywxc- ♀ 给 lilywxc 发送悄悄话 (0 bytes) () 02/22/2007 postreply 11:08:40

• 回复：Noise is random. -Arakis- ♂ 给 Arakis 发送悄悄话 (422 bytes) () 02/22/2007 postreply 14:14:59

• Yes -pieq314- ♀ 给 pieq314 发送悄悄话 pieq314 的博客首页 (707 bytes) () 02/22/2007 postreply 14:50:01

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