diff --git a/app/service/design/items/pipelines/split.py b/app/service/design/items/pipelines/split.py
index 62e61f9..5fb568e 100644
--- a/app/service/design/items/pipelines/split.py
+++ b/app/service/design/items/pipelines/split.py
@@ -1,3 +1,4 @@
+import io
 import logging
 
 import cv2
@@ -37,8 +38,8 @@ class Split(object):
                 result['front_image'], result["front_image_url"], _ = upload_png_mask(result_front_image_pil, f'{generate_uuid()}', mask=None)
 
                 height, width = front_mask.shape
-                mask_image = np.zeros((height, width, 4), dtype=np.uint8)
-                mask_image[front_mask != 0] = [0, 0, 255, 255]
+                mask_image = np.zeros((height, width, 3))
+                mask_image[front_mask != 0] = [0, 0, 255]
 
                 if result["name"] in ('blouse', 'dress', 'outwear', 'tops'):
                     result_back_image = np.zeros_like(rgba_image)
@@ -46,14 +47,24 @@ class Split(object):
                     result_back_image[back_mask != 0] = rgba_image[back_mask != 0]
                     result_back_image_pil = Image.fromarray(cvtColor(result_back_image, COLOR_BGR2RGBA))
                     result['back_image'], result["back_image_url"], _ = upload_png_mask(result_back_image_pil, f'{generate_uuid()}', mask=None)
-                    mask_image[back_mask != 0] = [0, 255, 0, 255]
+                    mask_image[back_mask != 0] = [0, 255, 0]
 
-                    image_bytes = cv2.imencode(".png", mask_image)[1].tobytes()
-                    req = oss_upload_image(bucket=AIDA_CLOTHING, object_name=f"mask/mask_{generate_uuid()}.png", image_bytes=image_bytes)
+                    rbga_mask = rgb_to_rgba(mask_image, front_mask + back_mask)
+                    mask_pil = Image.fromarray(cvtColor(rbga_mask.astype(np.uint8), COLOR_BGR2RGBA))
+                    image_data = io.BytesIO()
+                    mask_pil.save(image_data, format='PNG')
+                    image_data.seek(0)
+                    image_bytes = image_data.read()
+                    req = oss_upload_image(bucket=AIDA_CLOTHING, object_name=f"mask/mask_{generate_uuid()}.jpg", image_bytes=image_bytes)
                     result['mask_url'] = req.bucket_name + "/" + req.object_name
                 else:
-                    image_bytes = cv2.imencode(".png", mask_image)[1].tobytes()
-                    req = oss_upload_image(bucket=AIDA_CLOTHING, object_name=f"mask/mask_{generate_uuid()}.png", image_bytes=image_bytes)
+                    rbga_mask = rgb_to_rgba(mask_image, front_mask)
+                    mask_pil = Image.fromarray(cvtColor(rbga_mask.astype(np.uint8), COLOR_BGR2RGBA))
+                    image_data = io.BytesIO()
+                    mask_pil.save(image_data, format='PNG')
+                    image_data.seek(0)
+                    image_bytes = image_data.read()
+                    req = oss_upload_image(bucket=AIDA_CLOTHING, object_name=f"mask/mask_{generate_uuid()}.jpg", image_bytes=image_bytes)
                     result['mask_url'] = req.bucket_name + "/" + req.object_name
                     result['back_image'] = None
                     result["back_image_url"] = None