How to set previewMaxWidth and previewMaxHeight of jquery file upload (blueimp) - AngularJS

In app.js, I added "previewMaxWidth" and "previewMaxHeight" in the section as below but still not working.

(function () {
    'use strict';

       var url = 'server/php/';

    angular.module('demo', [
        'blueimp.fileupload'
    ])

        .controller('DemoFileUploadController', [
            '$scope', '$http', '$filter', '$window',
            function ($scope, $http) {
                $scope.options = {
                    url: url,
                    autoUpload: true,
                    dropZone: $('.dropzone'),  
                    previewMaxWidth: 150,
                    previewMaxHeight: 110,
                    disableImageResize: false,
                    imageMaxWidth: 800,
                    imageMaxHeight: 800,
                    acceptFileTypes: /(\.|\/)(gif|jpe?g|png)$/i

                };

Any suggestion on how/where to change the previewMaxWidth and previewMaxHeight?