Update app.py

app.py

@@ -21,6 +21,8 @@ def anonymize(im: Image, truncation_value: float):
     else:
         detections: List[ImageAnnotation]  = anonymizer.detector.get_detections([im])
         cached_detections[md5_] = detections
+    if len(detections) == 0:
+        return Image.fromarray(im)
     im = anonymizer.anonymize_images([im], detections)[0]
     im = Image.fromarray(im)
     return im