image set true flag

inference.py

@@ -253,6 +253,7 @@ class CustomSamPredictor(SamPredictor):
           (np.ndarray): Low resolution mask logits for subsequent iterations.
         """
         self.features = embedding
+        self.is_image_set = True
         return self.predict(
             point_coords=point_coords,
             point_labels=point_labels,