Pooling

Pooling(
    pre,
    post,
    target,
    psp='pre.r',
    operation='max',
    name=None,
    copied=False,
    net_id=0,
)

Performs a pooling operation (e.g. max.pooling) on the pre-synaptic population.

Each post-synaptic neuron covers a specific region (extent) of the pre-synaptic population, over which the result of the operation on firing rates will be assigned to sum(target).

The extent is automatically computed using the geometry of the populations, but can be specified in the `pooling()`` methods.

Example:

import ANNarchy as ann
from ANNarchy.extensions.convolution import Pooling

net = ann.Network()
inp = net.create(geometry=(100, 100), neuron=ann.Neuron(parameters="r = 0.0"))
pop = net.create(geometry=(50, 50), neuron=ann.Neuron(equations="r = sum(exc)"))

proj = net.connect(Pooling(inp, pop, 'exc', operation='max')) # max-pooling
proj.pooling() # extent=(2, 2) is implicit

Parameters

Name	Description	Default
pre	pre-synaptic population (either its name or a `Population` object).	required
post	post-synaptic population (either its name or a `Population` object).	required
target	type of the connection	required
operation	pooling function to be applied (“max”, “min”, “mean”)	`'max'`

Methods

Name	Description
pooling	Connects the `Pooling` projection.
save_connectivity	Not available.
save	Not available.
load	Not available.
receptive_fields	Not available.
connectivity_matrix	Not available.

pooling

pooling(extent=None, delays=0.0)

Connects the Pooling projection.

Parameters

Name	Type	Description	Default
extent	tuple	extent of the pooling area expressed in the geometry of the pre-synaptic population (e.g `(2, 2)`). In each dimension, the product of this extent with the number of neurons in the post-synaptic population must be equal to the number of pre-synaptic neurons. Default: None.	`None`
delays	float	synaptic delay in ms	`0.0`

save_connectivity

save_connectivity(filename)

Not available.

save

save(filename)

Not available.

load

load(filename)

Not available.

receptive_fields

receptive_fields(variable='w', in_post_geometry=True)

Not available.

connectivity_matrix

connectivity_matrix(fill=0.0)

Not available.