Is there any plan to support 3D conv?

[MichaelXin]

The Blob have height and width, but in some use cases it also need another dimention (e.g. frames, or time).
So I just want to know whether Caffe will support 3D (height, width and frame) convolution?

[ducha-aiki]

It already supports - by channels.

[shelhamer]

@MichaelXin sure -- with #1486 one could add a vol2col analogue of im2col for convolution or add explicit 3D convolution. cuDNN is likewise adding 3D conv and Caffe will integrate it.

As @ducha-aiki noted, the standard definition of convolution in conv. nets is actually 3D since it is across the spatial and channel dimensions.

[MichaelXin]

@shelhamer @ducha-aiki Thank you very much! It`s really helpful !

[svanschalkwyk]

How would one go about 3D convoluting over something like a CAT scan or MRI?

[shelhamer]

N-D convolution -- including 3-D -- is done in #2049.

[wolfbill]

@shelhamer Do you use c3d of facebook ?

[wolfbill]

@svanschalkwyk I am woking on it.Do you have any progress on it ?

[xjtuljy]

Have the PRs of N-D or 3-D been merged into caffe-master?