deallocate images on batch

modules/postprocessing.py

@@ -76,6 +76,7 @@ def run_postprocessing(extras_mode, image, image_folder: List[tempfile.NamedTemp
             images.save_image(pp.image, path=outpath, basename=basename, seed=None, prompt=None, extension=ext or opts.samples_format, info=infotext, short_filename=True, no_prompt=True, grid=False, pnginfo_section_name="extras", existing_info=pp.image.info, forced_filename=None)
         if extras_mode != 2 or show_extras_results:
             outputs.append(pp.image)
+        image.close()
 
     devices.torch_gc()
     return outputs, infotext, params