erikborra/lightbooth

A photobooth with a button, a relay, and a really long exposure

Raspberry Pi LightBooth

Lightbooth in a box

Lightbooth with all peripherals visible:

Usage

Connecting the peripherals

• Connect camera via USB to RPI. The camera should be set to M or P (preferably). Make sure the camera has sleep mode and/or battery saver disabled.
• Connect button and relay to RPI, see picture of breakout board
• Connect screen to RPI via HDMI
• Put the socket in the wall, connect a light to the socket
• Connect 5v USB adapter to RPI. Make sure it has enough Ampere for the number of lights connected to the relay

Connections of relay (black, red, orange wires with blue tape) and button (black, red, red wires):

Running lightbooth

cd lightbooth;
sudo python lightbooth.py

What happens?

• When lightbooth is running, the green led on the breakout board will be on.
• Once lightbooth is ready to take pictures it will display "ready for action" on the command line, and "Push the button" on the screen connected via HDMI.
• When the button is clicked, the screen connected to HDMI will count down from count_down_seconds to 0, display 'smile :)', and take a picture.
• When a picture is being taken, the lights connected to the wall socket will switch off and the red led on the breakout board will turn on.
• Once the picture has been taken, the lights connected to the wall socket will switch back on, and the red led on the breakout board will turn off.
• The screen connected to HDMI will display 'transferring picture' until the picture is loaded on screen.
• You can now click the button again to take a new picture.

Slideshow

• To view the captured images as a slideshow, use a computer which is on the same network as lightbooth. Open your browser and specify the following address: http://IP_ADDRESS/slideshow.
• The slideshow continually loops over all the captured images, in the order with which they were captured.
• When a new image is taken with lightbooth, the slideshow will show this picture and then continue its normal routine again.

Good to know

• The high-res version of the picture is stored in /home/pi/lightbooth/images
• A center square, lower res, version of the picture is stored in /home/pi/lightbooth/images/instagram. This picture also has the anomaly_img embedded.
• A samba share called 'lightbooth' has been set up on the same dir. Connect with raspberry pi credentials to be able to modify the contents of this dir; default is view only.
• If you see "command given gphoto2 ..." on the command line, but don't hear the camera click, restart lightbooth.

Config

General config

• show_hashtag can be set to true to watermark all images at the bottom middle
• hashtag can be set to any alphanumeric string to watermark all images
• do_count_down can be set to true to show a count down on screen before before an image is taken
• count_down_seconds determines the number of seconds to count down on screen before an image is taken
• upload_to_instagram can be set to true to automatically upload images to instagram. Make sure to set $username, $password, and $caption to the desired values in instagram.php.
• anomaly_img is used to water mark the images (bottom right). Values can be anomaly_transparent_white.png or anomaly_transparent_black.png (or any other image in /home/pi/lightbooth)

Note: if the image falls off screen, edit /boot/config.php and set disable_overscan=0

Gphoto

Gphoto2 is used to remote control the camera via USB. Before starting up lightbooth, you'll first need to make sure gphoto2 is configured properly.

For a Canon D6, a good configuration for light painting is as follows: aperture 22, iso 800, shutter speed 10, imageformat jpeg. This amounts to the following gphotos settings, to be set via the command line before you start lightbooth:

sudo gphoto2 --set-config /main/capturesettings/shutterspeed=15
sudo gphoto2 --set-config /main/imgsettings/iso=4
sudo gphoto2 --set-config /main/capturesettings/aperture=15
sudo gphoto2 --set-config /main/imgsettings/imageformat=1

For a Canon 550D, the following should be set via the command line before you start lightbooth::

sudo gphoto2 --set-config /main/capturesettings/shutterspeed=6
sudo gphoto2 --set-config /main/imgsettings/iso=4
sudo gphoto2 --set-config /main/capturesettings/aperture=22
sudo gphoto2 --set-config /main/imgsettings/imageformat=1

To experiment with other values, use the following on the command line:

sudo gphoto2 --list-config # for an overview of all configurable parameters
sudo gphoto2 --get-config /main/capturesettings/shutterspeed # for an overview of all shutter speed values
sudo gphoto2 --get-config /main/imgsettings/iso # for an overview of all iso values
sudo gphoto2 --get-config /main/capturesettings/aperture # for an overview of all aperture values

Wifi

Keep in mind, wired is always more reliable on pi. Nevertheless:

• sudo nano /etc/wpa_supplicant/wpa_supplicant.conf
• Go to the bottom of the file and add the following:

network={
    ssid="The_network_name"
    psk="Your_wifi_password"
}

• see here for more elaborate instructions

Example config for a static IP address

• sudo nano /etc/network/interfaces

auto wlan0
allow-hotplug wlan0
iface wlan0 inet static
address 192.168.1.111
gateway 192.168.1.1
dns-nameservers 8.8.8.8
netmask 255.255.255.0
wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

Clean install

Download and install Raspian.

Update Raspian

sudo apt-get update
sudo apt-get upgrade

Install newest version of gphoto from source (takes a while) wget https://raw.githubusercontent.com/gonzalo/gphoto2-updater/master/gphoto2-updater.sh && chmod +x gphoto2-updater.sh && sudo ./gphoto2-updater.sh

Install Adafruit GPIO Library git clone http://github.com/adafruit/Adafruit-Raspberry-Pi-Python-Code.git

Install the Python GPIO libraries for accessing the pins in python + install pygame which will be used as display + install php5 things for uploading to instagram sudo apt-get install python-dev python-rpi.gpio python-pygame python-setuptools php5-cli php5-curl

If screen has black borders, do the following sudo nano /boot/config.txt Set disable_overscan=1

Git clone this repo: git clone [email protected]:ErikBorra/lightbooth.git

To enable the slideshow:

sudo apt-get install apache2 php5 libapache2-mod-php5 -y
cd /var/www; sudo ln -s /home/pi/lightbooth/www slideshow