Update app.py

app.py

@@ -35,8 +35,12 @@ def segment_and_count(image):
     cell_count = len(np.unique(masks)) - 1  # subtract 1 for background
 
     # Overlay mask for display
+
     overlay = image_np.copy()
-    overlay[masks > 0] = [255, 0, 0]  # red overlay for segmented cells
+    alpha = 0.3  # Transparency factor (0.0 - 1.0, where 1.0 is fully opaque)
+
+    # Blend the red color with the original image where mask > 0
+    overlay[masks > 0] = (1 - alpha) * overlay[masks > 0] + alpha * np.array([255, 0, 0])
 
     # Convert result to PIL Image for output
     overlay_image = Image.fromarray(overlay)