在 python 3 和 windows 中拍摄网络摄像头照片

Question

我希望能够在 python 3 和 Windows 中从网络摄像头拍照。有支持的模块吗？我尝试过pygame，但它只是linux和python 2，而VideoCapture只是python 2。

Answer 1

我一直在寻找同样的东西，但到目前为止我却发现了一个空白。这是我到目前为止所拥有的：

 2.7 3.2 3.3 3.4 Linux WIN32
-------------------------------------------------- -----
OpenCV 是 - - - 是 是
PyGame 是是是是是是是是是
SimpleCV 是 - - - 是 是
视频捕捉 是 - - - - 是

资源

• opencv.org/downloads.html
• pygame.info/downloads/
• simplecv.org/download
• videocapture.sourceforge.net/

Answer 2

14年7月8日

Pygame 3.4 版本。已发布

http://www.youtube.com/watch?v=SqmSpJfN7OE
http://www.lfd.uci.edu/~gohlke/pythonlibs/

您可以下载“pygame-1.9.2a0.win32-py3.4.exe”

在 python 3.4 中从网络摄像头拍照（在 Windows 7 上测试）代码 [1]

import pygame
import pygame.camera

pygame.camera.init()
cam = pygame.camera.Camera(0,(640,480))
cam.start()
img = cam.get_image()
pygame.image.save(img,"filename.jpg")

参考 [1] 使用 Java 或 Python 从网络摄像头捕获单个图像

Answer 3

import cv2

# Open the device at the ID 0 
cap = cv2.VideoCapture(0)

 #Check whether user selected camera is opened successfully.

if not (cap.isOpened()):

    print("Could not open video device")

#To set the resolution 
    cap.set(cv2.cv.CV_CAP_PROP_FRAME_WIDTH, 640)

    cap.set(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT, 480)

while(True): 
# Capture frame-by-frame

    ret, frame = cap.read()

# Display the resulting frame

    cv2.imshow('preview',frame)

#Waits for a user input to quit the application

if cv2.waitKey(1) & 0xFF == ord('q'):
     #break

# When everything done, release the capture 
    cap.release()

    cv2.destroyAllWindows() 

Answer 4

这是 Pygame 代码，它将使用 Pygame 从网络摄像头拍摄照片。截至 2023 年，Pygame 同时支持 Windows 和 Python 3。

一个缺点是，调用

start()

方法后，网络摄像头可能需要大约 0.6 或 0.7 秒才能准备就绪。在此之前，它只返回全黑图像而不是照片。您可以在调用

get_image()

拍照之前添加 1 秒暂停，或者运行代码来检查返回的图像是否为全黑（我的示例中有此代码，但已注释掉。）

import pygame.camera, pygame.image, time
pygame.camera.init()

all_webcams = pygame.camera.list_cameras()
webcam = pygame.camera.Camera(all_webcams[0])  # Use the first found webcam.
webcam.start()  # Initialize the webcam.

time.sleep(1)  # Wait for the camera to get ready.
photo = webcam.get_image()  # Take a photo from the webcam.

# Uncomment the following and remove the previous two lines to have
# the webcam keep taking photos until it finds one that isn't all black.
#while True:
#    photo = webcam.get_image()  # Take a photo from the webcam.
#
#    # Check if the photo is all black because the webcam wasn't ready:
#    all_black = True
#    for x in range(photo.get_width()):
#        for y in range(photo.get_height()):
#            if photo.get_at((x, y)) != (0, 0, 0, 255):
#                all_black = False
#                break
#    if not all_black:
#        break  # The webcam was ready and took a real photo.
#    else:
#        time.sleep(0.1)  # Wait before trying to take another photo.

pygame.image.save(photo, "photo.png")  # You can also use .jpg or .bmp.
pygame.camera.quit()