getting correct params for rails to process

app.js

'use strict';

angular.module('offcampustest', ['ngRoute', 'ngResource', 'angularFileUpload'])
    .config(function($routeProvider, $locationProvider) {
      $routeProvider
      .when('/', {
          templateUrl:'/templates/rentals.html',
          controller: 'RentalsCtrl'
       }
      )
      .when('/newRental', {
              templateUrl: '/templates/newRental.html',
              controller: 'newRentalCtrl'
          })
      .otherwise({redirectTo: '/'});
      $locationProvider.html5Mode(true);
    })
    .factory('ImagesService', function($resource) {
        return $resource('/api/images/:id', {id: "@id"},
            {   'get':    {method:'GET'},
                'save':   {method:'POST'},
                'query':  {method:'GET', isArray:false},
                'remove': {method:'DELETE'},
                'delete': {method:'DELETE'} });
    })
    .controller('RentalsCtrl', function($scope, $upload, RentalService, ImagesService) {
        $scope.rental = new RentalService();

        $scope.newRental = function() {
            $scope.rental.$save();
        };

        RentalService.query(function(data) {
            $scope.rentals = data.rentals;
        });

        $scope.onFileSelect = function($files) {
            //$files: an array of files selected, each file has name, size, and type.
            for (var i = 0; i < $files.length; i++) {
                var file = $files[i];
                var image = {
                    url: file.filename,
                    rental_id: 1,
                    description: "Something in here"
                };
                $scope.upload = $upload.upload({
                    url: '/api/images', //upload.php script, node.js route, or servlet url
                    method: 'POST',
                    //headers: {'header-key': 'header-value'},
                    //withCredentials: true,
                    data: 'test image',//{myObj: $scope.myModelObj},
                    file: file, // or list of files ($files) for html5 only
                    //fileName: 'doc.jpg' // to modify the name of the file(s)
                    // customize file formData name ('Content-Desposition'), server side file variable name.
                    fileFormDataName: 'image[image]' //or a list of names for multiple files (html5). Default is 'file'
                    // customize how data is added to formData. See #40#issuecomment-28612000 for sample code
                    //formDataAppender: function(formData, key, val){}
                }).progress(function(evt) {
                        console.log('percent: ' + parseInt(100.0 * evt.loaded / evt.total));
                    }).success(function(data, status, headers, config) {
                        // file is uploaded successfully
                        console.log(data);
                    });
                //.error(...)
                //.then(success, error, progress);
                // access or attach event listeners to the underlying XMLHttpRequest.
                //.xhr(function(xhr){xhr.upload.addEventListener(...)})
            }
            /* alternative way of uploading, send the file binary with the file's content-type.
             Could be used to upload files to CouchDB, imgur, etc... html5 FileReader is needed.
             It could also be used to monitor the progress of a normal http post/put request with large data*/
            // $scope.upload = $upload.http({...})  see 88#issuecomment-31366487 for sample code.
        };

    });

images_controller.rb

# /api/images

module Api
  class ImagesController < ApplicationController
    before_action :set_image, only: [:show, :edit, :update, :destroy]

    def create
      @image = Image.new(image_params)

      if @image.save
        render json: @image, status: :created, root: false
      else
        render json: @image.errors
      end
    end

    def show
      render json: @image
    end

    private
    def set_image
      @rental = Rental.find(params[:id])
    end

    def image_params
      params.require(:image).permit(:url, :rental_id, :description)
    end
  end
end

logger

response from server after upload submit

{"id":3,"url":{"url":null},"rental_id":null,"description":null,"created_at":"2014-07-24T14:29:24.675Z","updated_at":"2014-07-24T14:29:24.675Z"}

rails log

Started POST "/api/images" for 127.0.0.1 at 2014-07-24 10:28:35 -0400
Processing by Api::ImagesController#create as HTML
  Parameters: {"url"=>"undefined", "rental_id"=>"1", "description"=>"Something in here", "image"=>{"image"=>#<ActionDispatch::Http::UploadedFile:0x3948ea0 @tempfile=#<Tempfile:C:/Users/lyonsn1/AppData/Local/Temp/RackMultipart20140724-9772-19ftmfb>, @original_filename="http300.PNG", @content_type="image/png", @headers="Content-Disposition: form-data; name=\"image[image]\"; filename=\"http300.PNG\"\r\nContent-Type: image/png\r\n">}}
Can't verify CSRF token authenticity
Unpermitted parameters: image
   (0.0ms)  begin transaction
  SQL (3.0ms)  INSERT INTO "images" ("created_at", "updated_at") VALUES (?, ?)  [["created_at", Thu, 24 Jul 2014 14:28:35 UTC +00:00], ["updated_at", Thu, 24 Jul 2014 14:28:35 UTC +00:00]]
   (6.0ms)  commit transaction
Completed 201 Created in 18ms (Views: 2.0ms | ActiveRecord: 9.0ms)

rentals.html

<h1>Working</h1>

<form ng-submit="newRental()">

    <input type="text" ng-model="rental.address" />
    <input type="submit" value="Submit" />

</form>
<input type="text" ng-model="myModelObj">
<input type="file" ng-file-select="onFileSelect($files)" >
<input type="file" ng-file-select="onFileSelect($files)" multiple>
<div class="button" ng-file-select="onFileSelect($files)" data-multiple="true"></div>
<div ng-file-drop="onFileSelect($files)" ng-file-drag-over-class="optional-css-class-name-or-function"
     ng-show="dropSupported">drop files here</div>
<div ng-file-drop-available="dropSupported=true"
     ng-show="!dropSupported">HTML5 Drop File is not supported!</div>
<button ng-click="upload.abort()">Cancel Upload</button>

<ul ng-repeat="rental in rentals">
    <li>{{rental.address}}</li>
</ul>