Vision API
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Based On:
https://github.com/EN10/CanvasToPNG

Front End UI:
https://github.com/EN10/App-Engine-Hosting/blob/master/vision-123/www/index.html

Open Image FileReader:
https://developer.mozilla.org/en-US/docs/Web/API/FileReader/readAsDataURL

AJAX reader.readAsDataURL:
https://www.w3schools.com/xml/tryit.asp?filename=tryajax_first

Google Cloud Vision API:
https://cloud.google.com/vision/docs/reference/libraries#client-libraries-install-nodejs

Install
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curl -sL https://deb.nodesource.com/setup_6.x | sudo -E bash -
sudo apt-get install -y nodejs

sudo apt install npm
npm install --save @google-cloud/vision
gcloud auth application-default login
npm install express

Error: Cannot find module
‘/home/user/node_modules/grpc/src/node/extension_binary/grpc_node.node’

npm install grpc

Run
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Start VM instance and copy External IP.

screen sudo node ~/VisionAPI/detect.js