Labkit remote drawing app

This a a nodejs app to draw labkit labels in the browser. It synchronizes the labels in case multiple devices access the labeling page.

Installation

• install nodejs and npm
• open terminal and navigate to this directory
• run npm install

Adjust URL

• in order to run it on a mobile device, you either need to run this on a server or use the IP of your computer in a local network (ifconfig)
• replace localhost with your IP / URL in public/js/script.js, line 2:

var url = 'http://localhost:8080/';

Run

• open terminal and navigate to this directory
• run node app.js
• open http://YOURDEVICEIP:8080/ with your phone or tablet
  • replace YOURDEVICEIP with the IP of your device
• use your fingers to draw labels
• use the buttons to change between background and foreground
• one can use multiple devices, the labels will be synchronized (I hope)
• to clear all labels, press clear all

Preparation

• the input image for the labkit segmentation has to be saved to /public/img/segmentationinput.png
• labkit needs to access / listen to file changes of /public/img/labeling.png and load the file as a labeling

Restrictions

• 2D only
• fixed labels, background and foreground
• fixed stroke with
• no undo
• no partial clearing