Hi,
I have a std vector of several 2D Mat `std::vector matList`, and instead of accessing the pixel values in the third dimension by using, e.g., `matList.at(k).at(i, j)`, i'd like to have a 3D mat so that I would access that same pixel using `mat3D.at(i, j, k)`. k can be up to several hundreds.
What would be the most efficient way to make this conversion, apart from assigning each pixel explicitly?
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