[BugFix] wandb image (#510)

* bugfix wandb image

* del judged

* use self._wandb

mmengine/visualization/vis_backend.py

@@ -411,6 +411,7 @@ class WandbVisBackend(BaseVisBackend):
             step (int): Useless parameter. Wandb does not
                 need this parameter. Default to 0.
         """
+        image = self._wandb.Image(image)
         self._wandb.log({name: image}, commit=self._commit)
 
     @force_init_env