diff --git a/modules/core.py b/modules/core.py
index ba45a929..1e5e2b8c 100644
--- a/modules/core.py
+++ b/modules/core.py
@@ -82,9 +82,9 @@ def get_previewer(device, latent_format):
             x_sample = x_sample.cpu().numpy().clip(0, 255).astype(np.uint8)
             for i, s in enumerate(x_sample):
                 if i > 0:
-                    show_preview(f'OpenCV Diffusion Preview {i}', s, title=f'Preview Image {i} [{step}/{total_steps}]')
+                    show_preview(s, title=f'Preview Image {i}, step = [{step}/{total_steps}')
                 else:
-                    show_preview(f'OpenCV Diffusion Preview {i}', s, title=f'Preview Image [{step}/{total_steps}]')
+                    show_preview(s, title=f'Preview Image, step =  {step}/{total_steps}')
 
     taesd.preview = preview_function
 
diff --git a/modules/cv2win32.py b/modules/cv2win32.py
index a235fd78..66eabddd 100644
--- a/modules/cv2win32.py
+++ b/modules/cv2win32.py
@@ -1,14 +1,36 @@
+import threading
 import cv2
 
 
-def show_preview(flag, img, title=None):
-    if title is None:
-        title = flag
-    cv2.imshow(flag, img[:, :, ::-1].copy())
-    cv2.setWindowTitle(flag, title)
-    cv2.setWindowProperty(flag, cv2.WND_PROP_TOPMOST, 1)
-    cv2.waitKey(1)
+flag = 'fooocus_cv2win32'
+buffer = []
+
+
+def worker():
+    global buffer, flag
+    while True:
+        cv2.waitKey(50)
+        try:
+            if len(buffer) > 0:
+                task = buffer.pop(0)
+                if task is None:
+                    cv2.destroyAllWindows()
+                else:
+                    img, title = task
+                    cv2.imshow(flag, img)
+                    cv2.setWindowTitle(flag, title)
+                    cv2.setWindowProperty(flag, cv2.WND_PROP_TOPMOST, 1)
+        except Exception as e:
+            print(e)
+    pass
+
+
+def show_preview(img, title='preview'):
+    buffer.append((img, title))
 
 
 def close_all_preview():
-    cv2.destroyAllWindows()
+    buffer.append(None)
+
+
+threading.Thread(target=worker, daemon=True).start()