What does zero padding mean?

Integral image zero-pads the top and left side of the output integral image, by this do they mean, are they referring to the padsize vector which is a vector of nonnegative integers that specifies the amount of padding to add to the dimension and the dimension along which to add it to?
Cheers, Neo Cornel

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Image Analyst
Image Analyst 2015-12-30

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It means you add a layer of pixels all the way around the image that have value 0. This is done by padarray() in the Image Processing Toolbox.

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Neo
Neo 2015-12-30
编辑:Neo 2015-12-30
Thank you, do you mean add a layer of pixels around the image where the image has the value 0? Cheers,
Neo
No. It means to enlarge the image by adding rectangular strips of zeros outside the rectangular edge of the image, so that you have a new larger rectangular image with a black frame around it.
Crystal. Cheers, mate.

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