ModuleNotFoundError: No module named 'object_detection'

[ZIKO94ZIKO]

Hi sir thank u very much for this project , i have this issue when i run VehicleMoniter.py !! any help please

(tensorflow_cpu) C:\Users\zakaria\Desktop\Traffic-Rule-Violation-Detection-System-master>python VehicleMoniter.py
Traceback (most recent call last):
  File "VehicleMoniter.py", line 42, in <module>
    from utils import visualization_utils as vis_util
  File "C:\Users\zakaria\Desktop\Traffic-Rule-Violation-Detection-System-master\utils\visualization_utils.py", line 35, in <module>
    from object_detection.core import standard_fields as fields
ModuleNotFoundError: No module named 'object_detection'