Cordova camera plugin allow user to select one picture at a time. However, we can show all pictures selected by gallery or captured by camera one by one by following code:

<div ng-controller=MultipleSelEx>
    <div class="list card">
          <div class="item item-divider" ng-click="oneImage()">Select one picture</div>
           <div class="item item-body">
                    <div ng-repeat="item in image">
                          <img ng-src="{{item}}" id="myImage" width="50" height="50" />
               </div>
          </div>
    </div>
    <div class="list card">
          <div class="item item-divider" ng-click="mulImage()">select multiple pictures</div>
          <div class="item item-body>
            <div ng-repeat="item in images">
                      <img ng-src="{{item}}" id="myImage" width="50" height="50" />
               </div>
          </div>
    </div>
</div>

JS file:

angular.module(myApp', ['ngCordova'])
.controller('MultipleSelEx', function($scope, $rootScope, $cordovaCamera ) {
    $scope.image = [];
    $scope.oneImage = function() { 
        var options = { 
            quality: 50, 
            destinationType: Camera.DestinationType.FILE_URI,
            sourceType: Camera.PictureSourceType.PHOTOLIBRARY,
            targetWidth: 200, 
             targetHeight: 200 
        };
         $cordovaCamera.getPicture(options).then(function(imageUri) {
            $scope.image.push(imageUri); 
         }, function(err) {
             // alert(err); 
         });
     }
})

Although, we have option to select multiple pictures at one time from Gallery, for that we need to first install plugin cordova-imagePicker by following cli command:

cordova plugin add https://github.com/wymsee/cordova-imagePicker.git

$scope.mulImage = function() {
    $scope.images = [];
    window.imagePicker.getPictures(
      function(results) {
        for (var i = 0; i < results.length; i++) {
          $scope.images.push(results[i]);
        }
        if(!$scope.$$phase) {
          $scope.$apply();
        }
      }, function (error) {
        console.log(error);
      }
    );
  };

I hope, it will help you..