cos1 = torch.abs(torch.sum(v1_out * normal_gt, 1, keepdim=True))
时间: 2024-05-26 12:12:43 浏览: 93
lbcnn.torch-master.zip_..累lbcnn;x3_LBCNN_lbp_lbp 神经网络_torch
This line of code calculates the cosine similarity between two vectors - `v1_out` and `normal_gt`.
`torch.sum(v1_out * normal_gt, 1)` performs element-wise multiplication between `v1_out` and `normal_gt`, and then sums the result along the second dimension. This results in a tensor of shape `(batch_size,)` where each element contains the dot product of the corresponding pair of vectors in the batch.
`torch.abs` takes the absolute value of the resulting tensor, which is necessary since cosine similarity can be negative if the angle between the vectors is greater than 90 degrees.
`keepdim=True` ensures that the resulting tensor has the same number of dimensions as the input tensor, with the second dimension reduced to size 1. This is necessary for later computations that require broadcasting.
阅读全文