a.rb

.controller('SelectPicCtrl', function($scope, PetService) {
  $scope.pets = PetService.all();

  $scope.launchPhotoLibrary = function() {
    navigator.camera.getPicture( cameraSuccess, cameraError,
                                { sourceType: navigator.camera.PictureSourceType.PHOTOLIBRARY } );
  };
  function cameraSuccess(imageURI) {
    $scope.image = document.getElementById('myImage');
    $scope.image.src = imageURI;
  }
  function cameraError(message) {
    alert('Failed because: ' + message);
  }
})