OpenCV Python视频没有响应

Question

我编写了以下代码，以过滤来自摄像机的视频馈送，从而仅显示光线或反射中的亮点。 当我运行它时，窗口打开，但是它没有响应，什么也没显示。

import cv2
import numpy as np
import keyboard

#Starts capturing video in a VideoCapture object called cap
cap = cv2.VideoCapture(0)

#While the q button is  not pressed, the while loop runs
while not keyboard.is_pressed('q'):
    #ret is a placeholder (not used)
    ret, frame = cap.read()

    #Sets the range of acepted colors in HSV
    whiteRange = np.array([[0, 0, 200], [255, 40, 255]])

    #Blurs the image to remove noise and smooth the details
    gaussianBlur = cv2.GaussianBlur(frame, (5,5), 0)
    #Converts from BGR to HSV to filter colors in the next step
    hsvFrame = cv2.cvtColor(gaussianBlur, cv2.COLOR_BGR2HSV)
    #Filters for white only and turns other colors black
    whiteFilter = cv2.inRange(hsvFrame, whiteRange[0], whiteRange[1])

    #Display the final image
    cv2.imshow('Tape-Detection', whiteFilter)

#Ends the capture and destroys the windows
cap.release()
cv2.destroyAllWindows()

任何建议也都很好，我是OpenCV Python的新手。

Answer 1

没有cv2.imshow()不能使用cv2.waitKey() 。 等待期间的备用循环用于更新显示。