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What does zero padding mean?

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Neo
Neo 2015-12-30
评论： Neo 2015-12-30
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
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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Image Analyst
Image Analyst 2015-12-30
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.
Neo
Neo 2015-12-30
Crystal. Cheers, mate.

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