def normalize_bbox(coords, ymax, scaler=<NUM_LIT:2>):
return [<EOL>coords[<NUM_LIT:0>] * scaler,<EOL>ymax - (coords[<NUM_LIT:3>] * scaler),<EOL>coords[<NUM_LIT:2>] * scaler,<EOL>ymax - (coords[<NUM_LIT:1>] * scaler),<EOL>]<EOL>
scales all coordinates and flip y axis due to different
origin coordinates (top left vs. bottom left)