fix(extras): fix batch image processing on 'Extras\Batch Process' tab

This change fixes an issue where an incorrect type was passed to the PIL.Image.open() function that caused the whole process to fail.

Scope of this change is limited to only batch image processing, and it shouldn't affect other functionality.

modules/postprocessing.py

 import os
+import tempfile
+from typing import List
 
 from PIL import Image
 
@@ -6,7 +8,7 @@ from modules import shared, images, devices, scripts, scripts_postprocessing, ui
 from modules.shared import opts
 
 
-def run_postprocessing(extras_mode, image, image_folder, input_dir, output_dir, show_extras_results, *args, save_output: bool = True):
+def run_postprocessing(extras_mode, image, image_folder: List[tempfile.NamedTemporaryFile], input_dir, output_dir, show_extras_results, *args, save_output: bool = True):
     devices.torch_gc()
 
     shared.state.begin()
@@ -18,7 +20,7 @@ def run_postprocessing(extras_mode, image, image_folder, input_dir, output_dir,
 
     if extras_mode == 1:
         for img in image_folder:
-            image = Image.open(img)
+            image = Image.open(os.path.abspath(img.name))
             image_data.append(image)
             image_names.append(os.path.splitext(img.orig_name)[0])
     elif extras_mode == 2:

modules/ui_postprocessing.py

@@ -13,7 +13,7 @@ def create_ui():
                     extras_image = gr.Image(label="Source", source="upload", interactive=True, type="pil", elem_id="extras_image")
 
                 with gr.TabItem('Batch Process', elem_id="extras_batch_process_tab") as tab_batch:
-                    image_batch = gr.File(label="Batch Process", file_count="multiple", interactive=True, type="file", elem_id="extras_image_batch")
+                    image_batch = gr.Files(label="Batch Process", interactive=True, elem_id="extras_image_batch")
 
                 with gr.TabItem('Batch from Directory', elem_id="extras_batch_directory_tab") as tab_batch_dir:
                     extras_batch_input_dir = gr.Textbox(label="Input directory", **shared.hide_dirs, placeholder="A directory on the same machine where the server is running.", elem_id="extras_batch_input_dir")