fractional max pooling

implementation of “Fractional Max-Pooling” (http://arxiv.org/abs/1412.6071) in Theano

What is done?

• disjoint pseudorandom fractional max pooling for 2D images

TODOs

• generic version
  • inputs:
    • shape numerators
    • shape denominators
  • how?
    • calculate output shape
    • calculate strides for each dim
      • eg. 1,1,1,2,2,2,2,1
    • strides determine top-left corner
    • pool size determines how much to pool
      • if None, same as strides
  • op inputs:
    • img
    • img shape
    • a
    • b
  • output:
    • new img
• ND-version