fix error path_input

app.py

@@ -36,9 +36,9 @@ if not os.path.exists(path_img_input_folder):
 
 def do_process(img):
     img_name = 'tmp.jpg'
-    img.save(path_input)
     path_input = os.path.join(path_img_input_folder, img_name)
     path_output = os.path.join(path_img_output_folder, 'vis',img_name)
+    img.save(path_input)
     result = ocr(path_input, out_dir=path_img_output_folder, save_vis=True)
     img_res = Image(filename=path_output)
     return img_res