diff --git a/tf_bodypix/sink.py b/tf_bodypix/sink.py
index dd021fe..7b91c42 100644
--- a/tf_bodypix/sink.py
+++ b/tf_bodypix/sink.py
@@ -40,4 +40,7 @@ def get_image_output_sink_for_path(path: str) -> T_OutputSink:
 
 def get_show_image_output_sink() -> T_OutputSink:
     from tf_bodypix.utils.opencv import ShowImageSink
-    return ShowImageSink('image')
+    return ShowImageSink(
+        window_name='image',
+        window_title='tf-bodypix'
+    )
diff --git a/tf_bodypix/utils/opencv.py b/tf_bodypix/utils/opencv.py
index f5f1e22..3244ade 100644
--- a/tf_bodypix/utils/opencv.py
+++ b/tf_bodypix/utils/opencv.py
@@ -200,25 +200,41 @@ def get_webcam_image_source(
 
 
 class ShowImageSink:
-    def __init__(self, window_name: str):
+    def __init__(
+        self,
+        window_name: str,
+        window_title: str = ''
+    ):
         self.window_name = window_name
+        self.window_title = window_title
+        self.was_opened = False
 
     def __enter__(self):
-        cv2.namedWindow(self.window_name, cv2.WINDOW_NORMAL)
-        cv2.resizeWindow(self.window_name, 600, 600)
         return self
 
     def __exit__(self, *_, **__):
-        cv2.destroyAllWindows()
+        if self.was_opened:
+            cv2.destroyWindow(self.window_name)
 
     @property
     def is_closed(self):
+        if not self.was_opened:
+            return False
         cv2.waitKey(1)
         return cv2.getWindowProperty(self.window_name, cv2.WND_PROP_VISIBLE) <= 0
 
+    def create_window(self, image_size: ImageSize):
+        cv2.namedWindow(self.window_name, cv2.WINDOW_NORMAL)
+        cv2.resizeWindow(self.window_name, image_size.width, image_size.height)
+        if self.window_title:
+            cv2.setWindowTitle(self.window_name, self.window_title)
+        self.was_opened = True
+
     def __call__(self, image_array: np.ndarray):
         if self.is_closed:
             LOGGER.info('window closed')
             raise KeyboardInterrupt('window closed')
         image_array = np.asarray(image_array).astype(np.uint8)
+        if not self.was_opened:
+            self.create_window(get_image_size(image_array))
         cv2.imshow(self.window_name, rgb_to_bgr(image_array))