Global and local statistics

Hello

I am working on a project that deals with image processing. My question is what are the global and local image statistics ?

Thanks in advance.

Answer 1

[David Young]

A global statistic is one which describes the whole image - e.g. the mean grey level of all the pixels of the image.

A local statistic one which describes a neighbourhood within the image - e.g. the mean grey level of a given pixel and its 8 nearest neighbours. Local statistics are often computed for many neighbourhoods ("patches") within an image, sometimes for a neighbourhood centred on every pixel.

[Ynne]

Thanks a lot