diff --git a/deploy_api.py b/deploy_api.py
index 7b03d28..92b9cbf 100644
--- a/deploy_api.py
+++ b/deploy_api.py
@@ -10,7 +10,6 @@ from hivision.utils import add_background, resize_image_to_kb_base64, hex_to_rgb
 import base64
 import numpy as np
 import cv2
-import os
 
 app = FastAPI()
 creator = IDCreator()
@@ -65,8 +64,13 @@ async def idphoto_inference(
 # 透明图像添加纯色背景接口
 @app.post("/add_background")
 async def photo_add_background(
-    input_image: UploadFile, color: str = Form(...), kb: str = Form(None)
+    input_image: UploadFile,
+    color: str = Form(...),
+    kb: str = Form(None),
+    render: int = Form(0),
 ):
+    render_choice = ["pure_color", "updown_gradient", "center_gradient"]
+
     image_bytes = await input_image.read()
     nparr = np.frombuffer(image_bytes, np.uint8)
     img = cv2.imdecode(nparr, cv2.IMREAD_UNCHANGED)
@@ -74,7 +78,11 @@ async def photo_add_background(
     color = hex_to_rgb(color)
     color = (color[2], color[1], color[0])
 
-    result_image = add_background(img, bgr=color).astype(np.uint8)
+    result_image = add_background(
+        img,
+        bgr=color,
+        mode=render_choice[render],
+    ).astype(np.uint8)
 
     if kb:
         result_image = cv2.cvtColor(result_image, cv2.COLOR_RGB2BGR)
@@ -83,7 +91,6 @@ async def photo_add_background(
         result_image_base64 = numpy_2_base64(result_image)
 
     # try:
-
     result_messgae = {
         "status": True,
         "image_base64": result_image_base64,
diff --git a/inference.py b/inference.py
index 5656928..e2a04e4 100644
--- a/inference.py
+++ b/inference.py
@@ -25,7 +25,11 @@ INFERENCE_TYPE = [
     "add_background",
     "generate_layout_photos",
 ]
-MATTING_MODEL = ["hivision_modnet", "modnet_photographic_portrait_matting", "mnn_hivision_modnet"]
+MATTING_MODEL = [
+    "hivision_modnet",
+    "modnet_photographic_portrait_matting",
+    "mnn_hivision_modnet",
+]
 RENDER = [0, 1, 2]
 
 parser.add_argument(
diff --git a/requests_api.py b/requests_api.py
index ac3f8de..bf35b15 100644
--- a/requests_api.py
+++ b/requests_api.py
@@ -3,6 +3,19 @@ import base64
 import argparse
 import os
 
+INFERENCE_TYPE = [
+    "idphoto",
+    "human_matting",
+    "add_background",
+    "generate_layout_photos",
+]
+MATTING_MODEL = [
+    "hivision_modnet",
+    "modnet_photographic_portrait_matting",
+    "mnn_hivision_modnet",
+]
+RENDER = [0, 1, 2]
+
 
 def base64_save(_base64_image_data, save_path):
     # 解码 Base64 数据并保存为 PNG 文件
@@ -66,16 +79,21 @@ if __name__ == "__main__":
     parser.add_argument(
         "-k", "--kb", help="输出照片的 KB 值，仅对换底和制作排版照生效", default=None
     )
+    parser.add_argument(
+        "-r",
+        "--render",
+        type=int,
+        help="底色合成的模式，有 0:纯色、1:上下渐变、2:中心渐变 可选",
+        choices=RENDER,
+        default=0,
+    )
     args = parser.parse_args()
-
     url = f"{args.url}/{args.type}"  # 替换为实际的接口 URL
-    # color = hex_to_rgb(args.color)
-    # color = (color[2], color[1], color[0])
 
     if args.type == "idphoto":
         # 调用 /idphoto 接口
         idphoto_response = request_idphoto(
-            args.input_image_dir, int(args.height), int(args.width)
+            args.input_image_dir, int(args.height), int(args.width), args.render
         )
 
         if idphoto_response["status"]: