Unpooling in theano

[KlaymenGC]

Hello,

I'm quite new to theano and Python and now I need some help on implementing a method of unpooling like in this paper: http://www.matthewzeiler.com/pubs/iccv2011/iccv2011.pdf
The main idea is, instead of simply repeating, this method saves the location of the pooled values, then inserts the pooled values in the appropriate locations in the unpooling maps, with the remaining
elements being set to zero.

Any thoughts will be greatly appreciated!

[TiRune]

Don't know if this is a Theano library issue, but Lasagne has an inverse layer. If you google around you can probably find a few implementations of unpooling layers with Theano :)

[KlaymenGC]

@TiRune thank you for your reply, but so far I haven't found one of the method I've mentioned using Theano, I'm still trying to modify downsample.py

[TiRune]

You kinda just use the gradient for this right? Look here:
https://github.com/Lasagne/Lasagne/blob/770ff0855469a5a4a0e2b41cc5970282fc75bc9f/lasagne/layers/special.py
Think that InverseLayer is what you need? :)

[nouiz]

There is a related issue here:

#2022

On Thu, Jan 7, 2016 at 5:56 AM, TiRune notifications@github.com wrote:

You kinda just use the gradient for this right? Look here:

https://github.com/Lasagne/Lasagne/blob/770ff0855469a5a4a0e2b41cc5970282fc75bc9f/lasagne/layers/special.py
Think that InverseLayer is what you need? :)

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