Add resolution field in BiRefNet extras tab section

scripts/postprocessing_rembg.py

@@ -37,7 +37,8 @@ class ScriptPostprocessingUpscale(scripts_postprocessing.ScriptPostprocessing):
     def ui(self):
         with ui_components.InputAccordion(False, label="Remove background with BiRefNet") as enable:
             with FormRow():
-                model = gr.Dropdown(label="Remove background", choices=models, value="None")
+                model = gr.Dropdown(label="Remove background model", choices=models, value="None", info="Choose a BiRefNet model. Each model gives a different result.")
+                resolution = gr.Textbox(label="Resolution", value="", placeholder="1024x1024", info="If left empty, it will take image size rounded to the nearest multiple of 32")
                 return_foreground = gr.Checkbox(label="Return foreground", value=False)
                 return_edge_mask = gr.Checkbox(label="Return edge mask", value=False)
 
@@ -53,12 +54,13 @@ def ui(self):
         return {
             "enable": enable,
             "model": model,
+            "resolution": resolution,
             "return_foreground": return_foreground,
             "return_edge_mask": return_edge_mask,
             "edge_mask_width": edge_mask_width,
         }
 
-    def process(self, pp: scripts_postprocessing.PostprocessedImage, enable, model, return_foreground, return_edge_mask, edge_mask_width):
+    def process(self, pp: scripts_postprocessing.PostprocessedImage, enable, model, resolution, return_foreground, return_edge_mask, edge_mask_width):
         if not enable:
             return
 
@@ -69,7 +71,7 @@ def process(self, pp: scripts_postprocessing.PostprocessedImage, enable, model,
 
         mask, output_image, edge_mask = birefnet.process(
             pp.image.convert("RGB"),
-            resolution='',
+            resolution=resolution,
             return_foreground=return_foreground,
             return_edge_mask=return_edge_mask,
             edge_mask_width=edge_mask_width