Cannot read property 'getPicture' of undefined - ionic camera

Your code is correct, just add an html button with ng-click="takePicture()".

There is no problem here, It's sure that the browser "cannot read property 'getPicture' of undefined" because it has no configuration for a mobile camera that you defined, which means you should test your application on a real device using:

> ionic run android.

Notice that the new update of Google Chrome has a new feature which helps your test your device on the browser if it is connected to the PC/laptop, for testing go to chrome's navigation panel >> More tools >> Inspect devices or just go to this link:

chrome://inspect/#devices

I'm sure your camera will function normally if you have the plugin cordova plugin add org.apache.cordova.camera installed in the app,
I hope this helps you.