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3D Histogram/Plot from Matrix?

3D Histogram/Plot from Matrix?

3D Histogram/Plot from Matrix?

(OP)
I have a couple questions--

First, I have a large number of images that I'd like to read in quickly and simply.  Beyond this, I'd like to sum together the matrices created by imread.  Is there a convenient way to read in large numbers of images?

Secondly, I have a matrix of values, each element corresponding to a pixel position on an image.  I'd like to create a 3D surface of this and color code it according to the value of each element.  That is, I'd essentially like a color-coded, 3D histogram.  How might I go about doing this?

Thanks a bunch for your time!

Most Gratefully,
a.

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