python opencv cv2 imshow threading 多线程

除了线程同步，还需要注意的是「窗口处理」要放在主线程

#!/usr/bin/env python3

# -*- coding: utf-8 -*-

import sys

import threading

from time import sleep

from queue import Queue

import cv2

import numpy as np

from functools import reduce

print(sys.version)

q = Queue()

def run(n):

    thread = threading.current_thread()

    thread.setName('thread-fuck')

    print('tid is: {0}'.format(thread.ident))

    print('thread name is: {0}'.format(thread.getName()))

    for i in range(100):

        img = np.random.randint(0,255,(200,300)).astype(np.uint8)

        q.put(img)

        sleep(0.1)

    q.put(0)

if __name__ == '__main__':

    thread = threading.Thread(target=run, args=(6,))

    thread.start()

    while True:

        try:

            item = q.get(block=False)

        except Exception as e:

            keycode = cv2.waitKey(20)

            if keycode & 0xFF == ord('q'):

                break

            continue

        if type(item) == int:

            break

        if type(item) == type(0):

            break

        cv2.imshow('fuck', item)

    thread.join()

    cv2.waitKey(0)

    cv2.destroyAllWindows()

    print('done!')

巴特西

python opencv cv2 imshow threading 多线程

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