[General Issue] 样本损失权重

[chen-del]

负样本损失权重也就是背景权重，在那个地方可以设置，因为要分割的类别像素相比于背景像素要少很多，我想将负样本损失权重增大，用于减少像素误分割的，请问我需要在yml文件中的那个位置进行设置。

[haoyuying]

https://github.com/PaddlePaddle/PaddleSeg/blob/release/2.6/paddleseg/models/losses/cross_entropy_loss.py#L40 cross entropy loss中的weight参数可以设置各个类别的权重，在yml中loss设置中增加weight及设置的参数即可。

[github-actions[bot]]

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