fix aspect issues

app.py

@@ -121,10 +121,11 @@ def predict(pdf, confidence, generate_file):
                 os.path.join(tmp_dir, filename_without_extension, image)
             ) as img:
                 size = img.size
-                if size[0] > size[1]:
-                    pdf.add_page("L")
+                width, height = size
+                if width > height:
+                    pdf.add_page((height, width))
                 else:
-                    pdf.add_page("P")
+                    pdf.add_page((width, height))
                 pred_dict = model_type.end2end_detect(
                     img,
                     valid_tfms,