Opencv Raspberry Python3 [英] Opencv Raspberry python3

问题描述

我想将Opencv3与raspberryPi一起使用，但是当我打开相机并对其进行测试时，没错，

I want to use Opencv3 with my raspberryPi, but when I open the camera, and I test it, it's right that, don't work

import cv2
cap = cv2.VideoCapture(0)
while 1:
    if cap.isOpened():
        print("Work")
    else:
        print("Don't work)

推荐答案

通常，如果要在Raspberry Pi上使用相机，则应该执行以下操作:

In general, if you want to use the camera on a Raspberry Pi, you should probably do the following:

步骤1-在raspi-config中启用摄像头

从raspi-config开始:

sudo raspi-config

并找到启用摄像头的命令-每个版本都不相同.启用相机并允许重新启动.

and find the command to enable the camera - it differs from version to version. Enable the camera and allow the reboot.

第2步-更新Raspberry Pi固件

通常，最好确保固件为最新版本，以便最新，最强大的内核和驱动程序正常工作.

It's generally a good idea to ensure that the firmware is up-to-date so the latest, greatest kernel and drivers work.

sudo rpi-update

此后需要重新启动.

步骤3-检查相机是否可以拍摄静止图像

您可以使用raspistill进行检查，以进行如下拍照:

You can check this with raspistill to take a photo as follows:

raspistill -o picture.jpg

---

第4步-配置v4l2

如果您还想使用 OpenCV 并拍摄视频，则需要确保已安装v4l2 "Linux视频" 模块.您可以执行以下操作:

If you additionally want to use OpenCV and shoot video, you will need to ensure that the v4l2 "Video for Linux" module is installed. You can do that with:

sudo modprobe bcm2835-v4l2

如果正确加载，则您应该能够从OpenCV中的摄像机访问视频.您可以在/etc/modules的底部添加一行，而不是在每次引导后都重复该命令，就像这样:

If that loads correctly, your should be able to access video from the camera in OpenCV. Rather than repeating the command after every boot, you can add a single line to the bottom of /etc/modules so it looks like this:

# /etc/modules: kernel modules to load at boot time.
#
# This file contains the names of kernel modules that should be loaded
# at boot time, one per line. Lines beginning with "#" are ignored.


# SETCHELL v4l2 added for OpenCV video capture
bcm2835-v4l2

我通常将我的姓氏放在我编辑的任何系统文件中，然后如果我弄乱了，我可以很容易地找到与之相关的任何文件，也可以备份它们，还可以告诉任何我在StackOverflow上提供帮助的人我所做的任何系统更改-是的，我有点强迫症！

I generally put my surname in any system files I edit then I can easily find any files I have dinked around with if I make a mess, and I can also back them up, and also tell anyone I help out on StackOverflow of any system changes I have made - yes, I am a bit OCD!

如果仍然无法正常工作，请检查电缆是否正确-银色连接器必须朝向HDMI端口.

If it still doesn't work, check your cable is correct - the silver connector must face the HDMI port.

关键字:Raspberry Pi，raspi，RPi，相机，相机电缆，静止图像，照片，视频，OpenCV，v4l，v4l2，Linux视频，raspi-config，raspistill，rpi-update， bcm2835，bcm2835-v4l2，模块，modprobe

Keywords: Raspberry Pi, raspi, RPi, camera, camera cable, still, photo, video, OpenCV, v4l, v4l2, Video for Linux, raspi-config, raspistill, rpi-update, bcm2835, bcm2835-v4l2, modules, modprobe

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