1 & N chairs is an autonomous system which uses an on-line cognitive computation engine, custom software, a usb camera and 2 screens each connected to a miniature Linux PC. The process starts with the camera automatically tilting, panning and zooming the image into a unique part of the physical wooden chair (see figure 4). On each cycle the camera searches for a new unique point of view of the wooden object. Once it targets its new frame, it captures a picture, during this process the spectator is able to see, in real-time, what the camera sees and targets through the camera's display (see item 2 in figure 3). The captured image is then sent to the on-line cognitive computing system which after a few seconds calls-back with a caption phrasing what it sees; a human like description of the reality encountered in the photograph. At this point of the process the textual interpretation given by the cognitive machine is used in two different forms; it is rendered as text on the right screen of the installation (see item 7 in figure 3), while in parallel, the same text is used as the query for a web-based image search. The returned image is finally displayed on the left screen mounted on the wall (see item 6 in figure 3). The process loops, each cycle starting with a different and unique image of the original chair, hence rendering each instance as a unique imagined reality based on the algorithms behind the cognitive computational model.

###Requirements

####Operating Systems

For all Raspberry Pis download and install Raspbian Jessie DOWNLOAD and SETUP GUIDE

####Rarspberry Pi CAMERA:

This part of the syste uses a raspberry pi 3 model B LINK

1. Download and install openframeworks for raspberry pi armv6 DOWNLOAD and SETUP INSTRUCTIONS
2. Download ofxLibwebsockets addon DOWNLOAD
3. Make sure you install the right version of requests for python, this project uses version 2.6.0 since it makes use of InsecureRequestWarning: sudo easy_install --upgrade pip sudo pip install requests==2.6.0

####Rarspberry Pi IMAGE:

This part of the syste uses a raspberry pi 1 model B LINK

1. Download and install openframeworks for raspberry pi armv6 DOWNLOAD and SETUP INSTRUCTIONS
2. Download ofxLibwebsockets addon DOWNLOAD

####Rarspberry Pi TEXT:

This part of the syste uses a raspberry pi 1 model B LINK

1. Download and install openframeworks for raspberry pi armv6 DOWNLOAD and SETUP INSTRUCTIONS
2. Download ofxLibwebsockets addon DOWNLOAD
3. Download ofxCenteredTrueTypeFont addon DOWNLOAD

###Setup Static IPs for all Raspberry Pis RbPi camera is 192.168.1.100 RbPi image is 192.168.1.110 RbPi text is 192.168.1.120

###Configuration

All 3 application contain a config.xml file located at /appName/bin/data

####Camera App

Located at: /1_n_chairs_camera/bind/data/config.xml

<CONFIG>
<panTopMax>0</panTopMax>
<panBotMax>0</panBotMax>
<panRightMax>0</panRightMax>
<panLeftMax>0</panLeftMax>
<zoomMax>10.0</zoomMax>
<connectionTimeout>5000</connectionTimeout>
</CONFIG>

• panLefMax: Maximum left margin to which camera can pan
• panRightMax: Maximum right margin to which camera can pan
• panTopMax: Maximum top margin to which camera can pan
• panBotMax: Maximum bottom margin to which camera can pan
• zoomMax: Maximum zoom allowed
• cycleTimeLimit: Time between cycles of the system
• port: Port to open with the websocket server
• fontSize: Font size for display messages

###Protocol Design

• server: 1_&_n_chairs_camera -> ID: $camera;
• client: 1_&_n_chairs_image -> ID: $image;
• client: 1_&_n_chairs_text -> ID: $text;

####STARTING

When the system is on, the server waits for a message from each client:

$image;ok
$text;ok

If one of the messages is not received, the system cannot will NOT start.

####SYNCHRONIZING

Every time the server broadcasts a message to the clients, whichever clients finishes processing first waits for the other to finish before displaying the result on the screen.

		SERVER
		|	 |
 CLIENT-1	 CLIENT-2

The server is the bridge between the clients. Once a client is ready to display on its screen, it first sends a message to the server. The server waits for the other client to send the READY to display message. Once the server receives both READY signals, it broadcasts back a message for displaying.

$image;ready
$text;ready
-----------
$display;

####RESTARTING A CYLCE

The server sends a reset message and a new cycle begins:

$reset;

####CLIENT LOST

If a client connection is lost, the server checks for its IP and stops the system. This is checked on the onClose() event of the ofxLibwebsocket library.

• $image; is 192.168.1.110
• $text; is 192.168.1.120

the system only runs if both state booleans are true:

if(isImageConnected && isTextConnected){
	//RUN SYSTEM
}else{
	//WAIT FOR BOTH CLIENTS TO CONNECT
}