如何在while循环中显示图像而不使openCV崩溃？

Question

我正在播放一段视频，其中我试图检测一些东西，每当我检测到我感兴趣的区域时，我想显示它几秒钟。

import cv2
capture = cv2.VideoCapture(path)
while True:
    ret,frame = capture.read(0)
    region_of_interest = detect(frame)
    if region_of_interest != 0:
        cv2.imshow('Image',region_of_interest)
        cv2.waitKey(2000)
        cv2.destroyWindow('Image')
    cv2.imshow('Normal Video',frame)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

capture.release()
cv2.destroyAllWindows()

问题是当它发现什么东西时，它会弹出很多窗口，然后它就崩溃了。

Answer 1

你正在为每一个循环创建和销毁窗口，试试这样做

import cv2
capture = cv2.VideoCapture(path)
while True:
   ret,frame = capture.read(0)
   region_of_interest = detect(frame)

    if region_of_interest != 0:
        # if you want to show somenthing better put a text
        cv2.putText(frame, data, (cord1, cord2), cv2.FONT_HERSHEY_SIMPLEX,0.5, (0, 255, 0), 2)


    cv2.imshow('Normal Video',frame)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

capture.release()
cv2.destroyAllWindows()