add focal length as output

app.py

@@ -138,7 +138,7 @@ def inference(img, model_type):
             pred['pred_rel_cx'].cpu().item(),
             pred['pred_rel_cy'].cpu().item(),
         ]
-        param = f"roll {pred['pred_roll'].cpu().item() :.2f}\npitch {pred['pred_pitch'].cpu().item() :.2f}\nfov {pred['pred_general_vfov'].cpu().item() :.2f}\n"
+        param = f"roll {pred['pred_roll'].cpu().item() :.2f}\npitch {pred['pred_pitch'].cpu().item() :.2f}\nvfov {pred['pred_general_vfov'].cpu().item() :.2f}\nfocal_length {pred['pred_rel_focal'].cpu().item()*img.shape[0] :.2f}\n"
         param += f"principal point {pred['pred_rel_cx'].cpu().item() :.2f} {pred['pred_rel_cy'].cpu().item() :.2f}"
         pred_vis = draw_from_r_p_f_cx_cy(
             img[:,:,::-1],