[Fix] Fix bug cannot use both '--tta' and '--out' while testing. (#3067)

## Motivation

Fix bug cannot use both '--tta' and '--out' while testing.
For details, please refer to #3064 .

## Modification

Add 'img_path' in TTA predictions.

---------

Co-authored-by: xiexinch <xiexinch@outlook.com>

mmseg/models/segmentors/seg_tta.py

@@ -44,5 +44,6 @@ class SegTTAModel(BaseTTAModel):
                     'pred_sem_seg': PixelData(data=seg_pred),
                     'gt_sem_seg': data_samples[0].gt_sem_seg
                 })
+            data_sample.set_metainfo({'img_path': data_samples[0].img_path})
             predictions.append(data_sample)
         return predictions

tests/test_models/test_segmentors/test_seg_tta_model.py

@@ -1,4 +1,6 @@
 # Copyright (c) OpenMMLab. All rights reserved.
+import tempfile
+
 import torch
 from mmengine import ConfigDict
 from mmengine.model import BaseTTAModel
@@ -37,7 +39,8 @@ def test_encoder_decoder_tta():
                     ori_shape=(10, 10),
                     img_shape=(10 + i, 10 + i),
                     flip=(i % 2 == 0),
-                    flip_direction=flip_direction),
+                    flip_direction=flip_direction,
+                    img_path=tempfile.mktemp()),
                 gt_sem_seg=PixelData(data=torch.randint(0, 19, (1, 10, 10))))
         ])