我在使用package CarouselSlider时遇到错误，它显示错误类型'Image‘不是flutter中类型'String’的子类型

import 'package:flutter/material.dart';
import 'package:carousel_slider/carousel_slider.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Carousel Slider Example'),
        ),
        body: Center(
          child: CarouselSlider(
            items: [
              Image.asset('assets/image1.jpg').toString(),
              Image.asset('assets/image2.jpg').toString(),
              Image.asset('assets/image3.jpg').toString(),
            ],
            options: CarouselOptions(
              height: 400,
              enlargeCenterPage: true,
            ),
          ),
        ),
      ),
    );
  }
}