import cv2 # 引入opencv库函数 ## VideCapture里面的序号 # 0 : 默认为笔记本上的摄像头(如果有的话) / USB摄像头 webcam # 1 : USB摄像头2 # 2 :USB摄像头3 以此类推 # -1:代表最新插入的USB设备 # 创建一个video capture的实例 cap = cv2.VideoCapture(0) # 查看Video Capture是否已经打开 pri...
2、从动态图片获取图像 在来看看怎么用OpenCV解构Twitter大牛jagarikin的视觉错觉图一文中我们看到gif格式图片可以看成视频文件,也可以用VideoCapture(文件名)方法打开gif格式的图片,操作过程和上述普通的视频文件类似。 3、从相机获取图像 打开相机需要用相机的设备编号(数值型整数)作为入参传入VideoCapture(相机编号),比如...
import cv2 def captureVideoFromCamera(): cap = cv2.VideoCapture(0,cv2.CAP_DSHOW) WIDTH = 1920 HEIGHT = 1920 FILENAME = r'f:\video\myvideo.avi' FPS = 24 cap.set(cv2.CAP_PROP_FPS, 24) # 建议使用XVID编码,图像质量和文件大小比较都兼顾的方案 fourcc = cv2.VideoWriter_fourcc(*'XVID') o...
print("Error: Could not open camera.") return # 创建捕获和显示视频的线程 capture_thread = threading.Thread(target=capture_video, args=(cap, q)) show_thread = threading.Thread(target=show_video, args=(q,)) # 启动线程 capture_thread.start() show_thread.start() # 等待线程结束 capture_thr...
这是在Python中使用cv2绑定的代码,我可以确认它可以运行:import cv2#capture from camera at location 0cap = cv2.VideoCapture(0)#set the width and height, and UNSUCCESSFULLY set the exposure timecap.set(3,1280)cap.set(4,1024)cap.set(15, 0.1)while True: ret, img = cap.read() cv2.imshow("...
importcv2importnumpyasnpimportmathtry:cap=cv2.VideoCapture(0)#from camera#cap = cv2.VideoCapture('./cvtest.mp4') #from video fileexcept:exit()NoneType=None#variable for comparisonRotateAngle=0#the angle needs to be rotate (the nearest ball)halfWidth=0#half of the image's widthStdDiameter=6....
camera.capture(stream, format='rgb')#format类型:bgr\rgb\h264 # 此时就可以获取到bgr的数据流了 image = stream.array import matplotlib.pyplot as plt image_resize = cv2.resize(image,(320, 240)) #opencv改变分辨率 plt.imshow(image_resize) ...
capture=cv.CaptureFromCAM(0)whileTrue:"""capture image from camera"""img=cv.QueryFrame(capture)"""convert color image to grey"""#img = binaryThreshold(img, threshold)"""Get the width and height of the image"""(width, height)=cv.GetSize(img)"""put text id and name in image"""text...
imshow('Capture Live Video Stream', frame) if cv.waitKey(1) == ord('q'): break # 线程结束,释放所有资源 cap.release() out.release() cv.destroyAllWindows() 参考 [1] OpenCV-Python Tutorials [2] Capture Video from Camera 坚持写专栏不易,如果觉得本文对你有帮助,记得点个赞。感谢支持!
{ cout << "Video camera is disconnected" << endl; break; } //连续帧之间等待20毫秒,如果按下q键就中断循环 int key = waitKey(20); if (key == 'q') { cout << "q key is pressed by the user. Stopping the video" << endl; break; } } // 释放视频捕获对象 vid_capture.release()...