#
#author :Sachin Mehta
#Description : This repository contains source code for semantically segmenting WSIs; however, it could be easily
# adapted for other domains such as natural image segmentation
#File Description: This file implements the Cross entropy loss for 2D data.
#==============================================================================
import torch
import torch.nn as nn
import torch.nn.functional as F
class CrossEntropyLoss2d(nn.Module):
def __init__(self, weight=None):
super().__init__()
self.loss = nn.NLLLoss2d(weight)
def forward(self, outputs, targets):
return self.loss(F.log_softmax(outputs), targets)
