code: def test2d_uniform(self):
      set_determinism(0)
      preds = torch.abs(torch.randn(2, 3, 16, 16))
      target = torch.abs(torch.randn(2, 3, 16, 16))
      preds = preds / preds.max()
      target = target / target.max()
  
      metric = SSIMMetric(
          spatial_dims=2, data_range=1.0, kernel_type="uniform"
      )
      metric(preds, target)
      result = metric.aggregate()
      expected_value = 0.050103
      self.assertTrue(expected_value - result.item() < 0.000001)
  
file_path: MONAI/tests/test_ssim_metric.py
imports: from __future__ import annotations
  import unittest
  import torch
  from monai.metrics.regression import SSIMMetric, compute_ssim_and_cs
  from monai.utils import set_determinism
label_desc: Use image node_id 2 for calling the TestSSIMMetric obj's underlying member method code with example usage: obj.test2d_uniform() without return types