OpenCVから Raspberry Pi専用のカメラモジュール RaspiCamを使える様にする方法

Raspberry Pi 3 Model Bに専用カメラモジュール RaspiCamを接続する方法

Raspberry Pi Zeroに専用カメラモジュール RaspiCam Zeroを接続する方法

# コマンドラインでラズパイのカメラを有効にする方法（最後の数字は 0でカメラ有効、1でカメラ無効）
sudo raspi-config nonint do_camera 0

# カメラを有効にすると自動的に gpu_memが 128になります
cat /boot/config.txt | grep gpu_mem
# gpu_mem=128

# Python 2.7
python -c "import picamera"

# Python 3
python3 -c "import picamera"

# お決まりの sudo apt-get updateで最新状態に更新する
sudo apt-get update

# picameraを apt-get installでインストールする
# Raspbian installation
sudo apt-get -y install python-picamera python3-picamera

from time import sleep
from picamera import PiCamera

camera = PiCamera()
camera.resolution = (1024, 768)
camera.start_preview()
# Camera warm-up time
sleep(2)
camera.capture('capture.jpg')

from io import BytesIO
from time import sleep
from picamera import PiCamera

# Create an in-memory stream
my_stream = BytesIO()
camera = PiCamera()
camera.start_preview()
# Camera warm-up time
sleep(2)
camera.capture(my_stream, 'jpeg')

from time import sleep
from picamera import PiCamera

# Explicitly open a new file called my_image.jpg
my_file = open('capture2.jpg', 'wb')
camera = PiCamera()
camera.start_preview()
sleep(2)
camera.capture(my_file)
# At this point my_file.flush() has been called, but the file has
# not yet been closed
my_file.close()

# Pillowで必要なのでインストールする
sudo apt-get install libjpeg-dev

# Python 2.7
sudo pip install Pillow

# Python 3
sudo pip3 install Pillow

from io import BytesIO
from time import sleep
from picamera import PiCamera
from PIL import Image

# Create the in-memory stream
stream = BytesIO()
camera = PiCamera()
camera.start_preview()
sleep(2)
camera.capture(stream, format='jpeg')
# "Rewind" the stream to the beginning so we can read its content
stream.seek(0)
image = Image.open(stream)

Update mmalobj.py
#501 opened Aug 31, 2018 by wilcovantoorn

Remove unused io import
#482 opened Apr 13, 2018 by bennuttall

enable MMALPythonSource to send MJPEG and H264 streams
#460 opened Jan 16, 2018 by barney-NG

Automatic MP4 muxing without external tools
#441 opened Sep 12, 2017 by LizardM4

Update api_mmalobj.rst
#394 opened Mar 27, 2017 by MoiCJarod

Corrected 4x4 binning for v1 camera to 2x2
#388 opened Mar 13, 2017 by kozuch

# お決まりの sudo apt-get updateで最新状態に更新する
sudo apt-get update

###Prerequisites### First make sure you have cmake and git installed:
sudo apt-get -y install cmake git

# You might also need gcc/g++ in case it's not already installed, along with some other libraries:
sudo apt-get -y install gcc g++ libx11-dev libxt-dev libxext-dev libgraphicsmagick1-dev libcv-dev libhighgui-dev

# You need the raspberry pi userland libraries:
mkdir -p ~/git/raspberrypi
cd ~/git/raspberrypi
git clone https://github.com/raspberrypi/userland.git
cd userland
./buildme
# 5分程度で完了

# Build the raspicam library
# Download Source code
mkdir -p ~/git
cd ~/git
# git clone https://github.com/robidouille/robidouille.git
# OpenCV v2 - master
git clone https://github.com/FREEWING-JP/robidouille.git -b master
# OpenCV v3 - feature/support_OpenCV_v3
# git clone https://github.com/FREEWING-JP/robidouille.git -b feature/support_OpenCV_v3
cd robidouille/raspicam_cv
mkdir objs
make
# 10秒程度で完了

ls -l
# pi@raspberrypi:~/git/robidouille/raspicam_cv $ ls -l
# -rw-r--r-- 1 pi pi 141012 Sep  2 19:20 libraspicamcv.a
# -rwxr-xr-x 1 pi pi 117264 Sep  2 19:20 libraspicamcv.so
# -rwxr-xr-x 1 pi pi 137868 Sep  2 19:20 raspicamtest


# This will create:
libraspicamcv.a: A static raspberry cam library which provides an opencv like interface
libraspicamcv.so: A shared library of the above
raspicamtest: A small test app which uses the static library. Execute with ./raspicamtest. Press Esc to exit.

./raspicamtest
　を X Windowから実行します。

# X Windowを起動
sudo systemctl start lightdm

pi@raspberrypi:~/git/robidouille/raspicam_cv $ ./raspicamtest
(RaspiCamTest:17278): Gtk-WARNING **: cannot open display:

# ImportError: No module named imutils.video
# imutils.video

pip install imutils
# Successfully installed imutils-0.5.1

from imutils.video import VideoStream

# vs = VideoStream(src=0).start()
vs = VideoStream(usePiCamera=True).start()

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BangGood通販はドローン以外にも面白い商品がまだまだ有った（電子工作編）