add GFPGAN model

lama_cleaner/plugins/gfpgan_plugin.py

@@ -0,0 +1,61 @@
+import cv2
+from loguru import logger
+
+from lama_cleaner.helper import download_model
+from lama_cleaner.plugins.base_plugin import BasePlugin
+
+
+class GFPGANPlugin(BasePlugin):
+    name = "GFPGAN"
+
+    def __init__(self, device):
+        super().__init__()
+        from .gfpganer import MyGFPGANer
+
+        url = "https://github.com/TencentARC/GFPGAN/releases/download/v1.3.0/GFPGANv1.4.pth"
+        model_md5 = "94d735072630ab734561130a47bc44f8"
+        model_path = download_model(url, model_md5)
+        logger.info(f"GFPGAN model path: {model_path}")
+
+        # Use GFPGAN for face enhancement
+        self.face_enhancer = MyGFPGANer(
+            model_path=model_path,
+            upscale=2,
+            arch="clean",
+            channel_multiplier=2,
+            device=device,
+        )
+
+    def __call__(self, rgb_np_img, files, form):
+        weight = 0.5
+        bgr_np_img = cv2.cvtColor(rgb_np_img, cv2.COLOR_RGB2BGR)
+        logger.info(f"GFPGAN input shape: {bgr_np_img.shape}")
+        _, _, bgr_output = self.face_enhancer.enhance(
+            bgr_np_img,
+            has_aligned=False,
+            only_center_face=False,
+            paste_back=True,
+            weight=weight,
+        )
+        logger.info(f"GFPGAN output shape: {bgr_output.shape}")
+
+        # try:
+        #     if scale != 2:
+        #         interpolation = cv2.INTER_AREA if scale < 2 else cv2.INTER_LANCZOS4
+        #         h, w = img.shape[0:2]
+        #         output = cv2.resize(
+        #             output,
+        #             (int(w * scale / 2), int(h * scale / 2)),
+        #             interpolation=interpolation,
+        #         )
+        # except Exception as error:
+        #     print("wrong scale input.", error)
+        return bgr_output
+
+    def check_dep(self):
+        try:
+            import gfpgan
+        except ImportError:
+            return (
+                "gfpgan is not installed, please install it first. pip install gfpgan"
+            )