walking average help!

[Mikinka]

Hi there,

I've tried the plugin walking average to smooth the sequence of images. I set 3 frames to average for my 31 images and then got 28 images (RollAverage0 to 27).
I thought I'd get 29 images because it would be the projection of the images 1-3,2-4,3-5,...and 29-31.
My understanding would be incorrect.

Any explanations for this and help would be really appreciated!

Mikinka