add remove bg model selection

iopaint/plugins/remove_bg.py

@@ -1,10 +1,11 @@
 import os
 import cv2
 import numpy as np
+from loguru import logger
 from torch.hub import get_dir
 
 from iopaint.plugins.base_plugin import BasePlugin
-from iopaint.schema import RunPluginRequest
+from iopaint.schema import RunPluginRequest, RemoveBGModel
 
 
 class RemoveBG(BasePlugin):
@@ -12,32 +13,53 @@ class RemoveBG(BasePlugin):
     support_gen_mask = True
     support_gen_image = True
 
-    def __init__(self):
+    def __init__(self, model_name):
         super().__init__()
-        from rembg import new_session
+        self.model_name = model_name
 
         hub_dir = get_dir()
         model_dir = os.path.join(hub_dir, "checkpoints")
         os.environ["U2NET_HOME"] = model_dir
 
-        self.session = new_session(model_name="u2net")
+        self._init_session(model_name)
+
+    def _init_session(self, model_name: str):
+        if model_name == RemoveBGModel.briaai_rmbg_1_4:
+            from iopaint.plugins.briarmbg import (
+                create_briarmbg_session,
+                briarmbg_process,
+            )
+
+            self.session = create_briarmbg_session()
+            self.remove = briarmbg_process
+        else:
+            from rembg import new_session, remove
+
+            self.session = new_session(model_name=model_name)
+            self.remove = remove
+
+    def switch_model(self, new_model_name):
+        if self.model_name == new_model_name:
+            return
+
+        logger.info(
+            f"Switching removebg model from {self.model_name} to {new_model_name}"
+        )
+        self._init_session(new_model_name)
+        self.model_name = new_model_name
 
     def gen_image(self, rgb_np_img, req: RunPluginRequest) -> np.ndarray:
-        from rembg import remove
-
         bgr_np_img = cv2.cvtColor(rgb_np_img, cv2.COLOR_RGB2BGR)
 
         # return BGRA image
-        output = remove(bgr_np_img, session=self.session)
+        output = self.remove(bgr_np_img, session=self.session)
         return cv2.cvtColor(output, cv2.COLOR_BGRA2RGBA)
 
     def gen_mask(self, rgb_np_img, req: RunPluginRequest) -> np.ndarray:
-        from rembg import remove
-
         bgr_np_img = cv2.cvtColor(rgb_np_img, cv2.COLOR_RGB2BGR)
 
         # return BGR image, 255 means foreground, 0 means background
-        output = remove(bgr_np_img, session=self.session, only_mask=True)
+        output = self.remove(bgr_np_img, session=self.session, only_mask=True)
         return output
 
     def check_dep(self):