Incubator-mxnet: How to understand terms "kNCHW", "NCW", "NCHW", "NCDHW", "kNHWC"...

[kernel8liang]

How to understand terms "kNCHW", "NCW", "NCHW", "NCDHW", "kNHWC", "kNCHW", "kNHWC".

Totally， lost.

[ZihengJiang]

The capital letter is used to specify the layout of data, which is used in convolution usually:
N: batch size
C: channel
H: height
W: width
so that "NCHW" means a data whose layout is (batch_size, channel, height, width)

and the lower case k represents a enum class, see: https://github.com/dmlc/mshadow/blob/master/mshadow/base.h#L312
https://github.com/dmlc/mxnet/blob/master/include/mxnet/operator.h#L24

[sxjscience]

We need to document the behavior of layout.

[kernel8liang]

Why "batch size" is N, and "k" represents "a enum calss" ?

[ZihengJiang]

@kernel8liang just custom, which is also common in other librarys

[ZihengJiang]

@sxjscience a pinned FAQ issue in github maybe also good

[kernel8liang]

thanks.