[Fix] Fix seg eval test (#2264)

* fix seg_eval

* add test for the bug

* update

* update

* update

* fix test bug

tests/test_evaluation/test_functional/test_seg_eval.py

@@ -32,8 +32,8 @@ def test_indoor_eval():
     assert np.isclose(ret_value['car'], 0.428571429)
     assert np.isclose(ret_value['bicycle'], 0.428571429)
     assert np.isclose(ret_value['motorcycle'], 0.6666667)
-    assert np.isclose(ret_value['truck'], 0.6666667)
+    assert np.isclose(ret_value['truck'], 0.5)
 
-    assert np.isclose(ret_value['acc'], 0.7)
-    assert np.isclose(ret_value['acc_cls'], 0.7)
-    assert np.isclose(ret_value['miou'], 0.547619048)
+    assert np.isclose(ret_value['acc'], 0.65)
+    assert np.isclose(ret_value['acc_cls'], 0.65)
+    assert np.isclose(ret_value['miou'], 0.50595238)