Question

我目前正在使用opencv和python来运行两个网络摄像头。这些网络摄像头将分别拍照。我想在不同的线程上运行它们，以便尽可能地同步图片。我正在使用videocapture :: grab（）和videocapture :: retreive（），但我不确定我是否正确使用它们，因为当我注释掉抓取功能时，它似乎可以自行检索。以下是我的代码。

import threading
import time
import sys
import cv2
from multiprocessing.pool import ThreadPool
count = 0
video_capture1 = cv2.VideoCapture(1)
video_capture2 = cv2.VideoCapture(2)

#camera1
class myThread1(threading.Thread):
    def __init__(self, threadID, name, device):
        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
    def run(self):
        print "Starting " + self.name
        # Get lock to synchronize threads
       # threadLock.acquire()
        camCapture(self.name, 1)
        # Free lock to release next thread
       # threadLock.release()

def camCapture(threadName, device):

    if video_capture1.grab():
        print "frame grabbed1"

#camera2    
class myThread2 (threading.Thread):
    def __init__(self, threadID, name, device):
        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name

    def run(self):
        print "Starting " + self.name
        # Get lock to synchronize threads
       # threadLock.acquire()
        camCapture2(self.name, 2)
        # Free lock to release next thread
       # threadLock.release()

def camCapture2(threadName, device):
    if video_capture2.grab():
        print "frame grabbed2"



# Create new threads
thread1 = myThread1(1, "Thread-1", count)
thread2 = myThread2(2, "Thread-2", count)

# Start new Threads
thread1.start()
thread2.start()


ret, image1 = video_capture1.retrieve()
ret, image2 = video_capture2.retrieve()
cv2.imwrite("C:\Users\Me\Desktop\camOne" + str(count) + ".bmp", image1)
cv2.imwrite("C:\Users\Me\Desktop\camTwo" + str(count) + ".bmp", image2)

我是否使用抓取和检索命令的正确语法？我只想在测试这些相机之前确定一下。

我也将这些照片保存为Bitmap图像，因为我希望它们尽可能接近原始格式。这是我最好的选择吗？

如何使用抓取和检索打开的cv函数？

0 个答案: