[to #42322933]cv/cvdet_fix_outputs->master fix outputs

Link: https://code.alibaba-inc.com/Ali-MaaS/MaaS-lib/codereview/10421413

    * fix outputs

modelscope/pipelines/cv/image_detection_pipeline.py

@@ -43,11 +43,15 @@ class ImageDetectionPipeline(Pipeline):
 
         bboxes, scores, labels = self.model.postprocess(inputs['data'])
         if bboxes is None:
-            return None
+            outputs = {
+                OutputKeys.SCORES: [],
+                OutputKeys.LABELS: [],
+                OutputKeys.BOXES: []
+            }
+            return outputs
         outputs = {
             OutputKeys.SCORES: scores,
             OutputKeys.LABELS: labels,
             OutputKeys.BOXES: bboxes
         }
-
         return outputs

tests/pipelines/test_object_detection.py

@@ -19,20 +19,14 @@ class ObjectDetectionTest(unittest.TestCase, DemoCompatibilityCheck):
         model_id = 'damo/cv_vit_object-detection_coco'
         object_detect = pipeline(Tasks.image_object_detection, model=model_id)
         result = object_detect(input_location)
-        if result:
-            print(result)
-        else:
-            raise ValueError('process error')
+        print(result)
 
     @unittest.skipUnless(test_level() >= 2, 'skip test in current test level')
     def test_object_detection_with_default_task(self):
         input_location = 'data/test/images/image_detection.jpg'
         object_detect = pipeline(Tasks.image_object_detection)
         result = object_detect(input_location)
-        if result:
-            print(result)
-        else:
-            raise ValueError('process error')
+        print(result)
 
     @unittest.skipUnless(test_level() >= 0, 'skip test in current test level')
     def test_human_detection(self):
@@ -40,20 +34,14 @@ class ObjectDetectionTest(unittest.TestCase, DemoCompatibilityCheck):
         model_id = 'damo/cv_resnet18_human-detection'
         human_detect = pipeline(Tasks.human_detection, model=model_id)
         result = human_detect(input_location)
-        if result:
-            print(result)
-        else:
-            raise ValueError('process error')
+        print(result)
 
     @unittest.skipUnless(test_level() >= 2, 'skip test in current test level')
     def test_human_detection_with_default_task(self):
         input_location = 'data/test/images/image_detection.jpg'
         human_detect = pipeline(Tasks.human_detection)
         result = human_detect(input_location)
-        if result:
-            print(result)
-        else:
-            raise ValueError('process error')
+        print(result)
 
     @unittest.skip('demo compatibility test is only enabled on a needed-basis')
     def test_demo_compatibility(self):