more pixels are better!

Started Dec 14, 2008 | Discussions thread
ejmartin Veteran Member • Posts: 6,274
Re: To be more specific...

John Sheehy wrote:

ejmartin wrote:

John Sheehy wrote:

Take any noise from a camera with low MP, and upsize it to the number
of pixels of current high-MP cameras, and the noise becomes more
intense at the same resulting-pixel magnification.

I'm not sure what you mean by this. Upsampling does not make the
noise more intense at any fixed spatial frequency of the original
image.

Who is talking in that context?

Usually "the noise becomes more intense" means it becomes of higher amplitude.

I suggested that when you upsample a low-MP image to meet the
higher-MP one, its real image noise, relative to the higher one, is
now apparent, and no longer "hiding" by having a small displayed
image size.

I think perhaps you meant to say that the grain size is magnified, and so it is more visually apparent when the image is magnified, rather than the noise becoming "more intense". Just trying to preclude misinterpretation.

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