Python说；TrackerMediaFlow“u create（）”；不再是cv2的属性，库是否已更新？

Python说trackerDianflow_create（）不再是cv2的属性

我在这里看过，但不一样： 我在几个discord服务器上询问过，但没有成功。 我用ctrl+c直接从教科书中复制了这段代码，所以应该是准确的

import cv2
import numpy as np

cap = cv2.VideoCapture("../data/traffic.mp4")
_, frame = cap.read()

bbox = cv2.selectROI(frame, False, True)

cv2.destroyAllWindows()

tracker = cv2.TrackerMedianFlow_create()
status_tracker = tracker.init(frame, bbox)
fps = 0

while True:
    status_cap, frame = cap.read()
    if not status_cap:
        break

    if status_tracker:
        timer = cv2.getTickCount()
        status_tracker, bbox = tracker.update(frame)

    if status_tracker:
        x, y, w, h = [int(i) for i in bbox]
        cv2.rectangle(frame, (x, y), (x + w, y + h), (0, 255, 0), 15)
        fps = cv2.getTickFrequency() / (cv2.getTickCount() - timer);
        cv2.putText(frame, "FPS: %.0f" % fps, (0, 80), cv2.FONT_HERSHEY_SIMPLEX, 3.5, (0, 0, 0), 8);
    else:
        cv2.putText(frame, "Tracking failure detected", (0, 80), cv2.FONT_HERSHEY_SIMPLEX, 3.5, (0,0,255), 8)

    cv2.imshow("MedianFlow tracker", frame)

    k = cv2.waitKey(1)

    if k == 27: 
        break

cv2.destroyAllWindows()

导致问题的原因是：

tracker = cv2.TrackerMedianFlow_create()

直到代码运行为止

Traceback (most recent call last):
  File "D:/Documents/E-Books/Comp Vision/opencv3computervisionwithpythoncookbook_ebook/OpenCV3ComputerVisionwithPythonCookbook_Code/Chapter04/myPart5.py", line 11, in <module>
    tracker = cv2.TrackerMedianFlow_create()
AttributeError: module 'cv2.cv2' has no attribute 'TrackerMedianFlow_create'

回溯（最近一次呼叫最后一次）：
文件“D:/Documents/E-Books/Comp-Vision/opencv3computervisionwhithpythoncookbook\u ebook/opencv3computervisionwhithpythoncookbook\u Code/Chapter04/myPart5.py”，第11行
tracker=cv2.TrackerMedianFlow_create（）
AttributeError:模块“cv2.cv2”没有属性“TrackerDianflow\u create”

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我希望它能正常工作。

trackerDianflow

是一个标准版本，并不是官方OpenCV发行版的标准版本。您需要安装opencv contrib软件包才能访问

trackerDianflow\u create（）

根据，您应该卸载不带附加模块的软件包，然后继续使用所需的附加模块重新安装opencv

pip uninstall opencv-python
pip install opencv-contrib-python

对于opencv 4.5.1用户

opencv contrib python

import cv2
cv2.legacy_TrackerMedianFlow()

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从4.5.1开始，它们被放在遗留中