在tkinter按钮调用的函数中使用cv2.destroyAllWindows时不起作用

时间:2019-07-10 06:30:01

标签: python opencv tkinter

我使用cv2.destroyAllWindows破坏了由Tkinter按钮调用的函数内的imshow()窗口。 但是它不起作用,imshow()窗口仍然保持打开状态

我正在制作一个运动检测器,当按下tkinter按钮时它会被激活。 如果我不使用tkinter按钮将imshow()窗口正确关闭。 但是在我将功能与tkinter按钮一起使用后,它没有

import cv2,pandas
from datetime import datetime

def motion_detection():
    CSV_path='Files\\'
    first_frame=None
    status_list=[None,None]
    times=[]
    df=pandas.DataFrame(columns=["Start","End"])

    video=cv2.VideoCapture(0)

    while True:
        check, frame = video.read()
        status=0
        gray=cv2.cvtColor(frame,cv2.COLOR_BGR2GRAY)
        gray=cv2.GaussianBlur(gray,(21,21),0)

        if first_frame is None:
            first_frame=gray
            continue

        delta_frame=cv2.absdiff(first_frame,gray)
        thresh_frame=cv2.threshold(delta_frame,30,255,cv2.THRESH_BINARY)[1]
        thresh_frame=cv2.dilate(thresh_frame,None,iterations=2)

        (cnts,_)=cv2.findContours(thresh_frame.copy(),cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)

        for contour in cnts:
            if cv2.contourArea(contour) < 3000:
               continue
            status=1

            (x,y,w,h)=cv2.boundingRect(contour)
            cv2.rectangle(frame, (x,y), (x+w,y+h), (0,255,0), 3)
        status_list.append(status)

        status_list=status_list[-2:]

        if status_list[-1]==1 and status_list[-2]==0:
            times.append(datetime.now())
        if status_list[-1]==0 and status_list[-2]==1:
            times.append(datetime.now())

        cv2.imshow("Gray Frame",gray)
        cv2.imshow("Delta Frame",delta_frame)
        cv2.imshow("Threshold Frame",thresh_frame)
        cv2.imshow("color Frame",frame)

        key=cv2.waitKey(1)

        if key==ord('q'):
            if status==1:
                times.append(datetime.now())
            break

    for i in range(0,len(times),2):
        df=df.append({"Start":times[i],"End":times[i+1]},ignore_index=True)

    df.to_csv(CSV_path+"Times.csv")

    video.release()
    cv2.destroyAllWindows

from tkinter import *
import motion_detector

main_window = Tk()

start_camera = Button(main_window, text="Start Camera", command=motion_detector.motion_detection)
start_camera.grid(row = 2, column = 0)

view_database = Button(main_window, text="View Database")
view_database.grid(row = 2, column = 2)


main_window.mainloop()

当我从键盘上按q时,我希望所有imshow()窗口都关闭,但是即使函数停止执行也不会关闭

0 个答案:

没有答案