# LRN¶

## Description¶

Info

Parent class: Module

Parent classes: CrossMapLRN, MapLRN, LCN

This module does not implement any operations, but setves as the basis for local response normalization modules.

There are two types of local normalization layers:

• inter-channel normalization;
• intra-channel normalization.

The only difference between them is the area of normalization. In the intra-channel LRN, a 2D neighborhood is determined within one channel, whereas in the inter-channel LRN, the spatial neighborhood is limited to one element, while normalization occurs along a certain neighborhood of the channels.

This normalization technique in general practically does not affect the final result, therefore it is considered obsolete.

## Initializing¶

def __init__(self, N=5, alpha=1e-4, beta=0.75, K=2.0, name=None):


Parameters

Parameter Allowed types Description Default
N int Number of elements to normalize 5
alpha float Bias 1e-4
beta float Scale parameter 0.75
K float Incremental coefficient 2.0
name str Layer name None

Explanations

See descendant classes.