Raspberry Pi: Camera

Camera setup

Setup

Permissions

Create a group with permission tu use the camera, and add the user that will be using it:

# echo 'SUBSYSTEM=="vchiq",GROUP="video",MODE="0660"' \
>  > /etc/udev/rules.d/10-vchiq-permissions.rules
# usermod -a -G video pi

Reboot.

Set paths: edit $HOME/.bashrc, add:

add:

export PATH=$PATH:/opt/vc/bin
export LD_LIBRARY_PATH=$LD_LIBRARYPATH:/opt/vc/lib

Bash

Command	Action
raspistill	Capturing still photographs with the camera module
raspivid	Capturing video with the camera module
Time-lapse	Taking pictures at regular intervals and stitching them together in to a video
raspiyuv	Capturing still photographs and generating raw unprocessed image files

Python

First install the python-picamera

sudo apt-get update
sudo apt-get install python-picamera

Usage

# Import module
import picamera

# Create an instance
camera = picamera.PiCamera()

# Take a picture
camera.capture('image.jpg')

# Horizontal/Vertical flip
camera.hflip = True
camera.vflip = True

# Start/Stop preview
camera.start_preview()
camera.stop_preview()

# Camera Settings
camera.brightness = 70 #Defoult is 50

# Other settings default values:
camera.sharpness = 0
camera.contrast = 0
camera.brightness = 50
camera.saturation = 0
camera.ISO = 0
camera.video_stabilization = False
camera.exposure_compensation = 0
camera.exposure_mode = 'auto'
camera.meter_mode = 'average'
camera.awb_mode = 'auto'
camera.image_effect = 'none'
camera.color_effects = None
camera.rotation = 0
camera.hflip = False
camera.vflip = False
camera.crop = (0.0, 0.0, 1.0, 1.0)


# Video recording
camera.start_recording('video.h264')
sleep(5)
camera.stop_recording()

python-picamera documentation