Surfing on Wikipedia, I found this article about image moments. To be honest at the beginning it just seemed to me to be some ugly maths . But believe me or not, when I read it in more details I discovered really interesting things  .

Basically moments are often used in physic in order to describe mass repartition of a body. You can derive the “idea” in image processing in substituting mass by grey level of pixel. This can give really interesting  information about pixels repartition into an image.  Indeed, it’s possible to use them in order to find center, orientation and size of a shape into an image. To summary image moments is a way to find all my schema below parameters just with pixels information:

Let’s see how it works and how to implement it in Actionscript.

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