PerceptualHash algorithm does not work and give me Invalid value: Valid value range is empty

[mohShahbal]

The Error:

E/flutter ( 6730): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: RangeError (index): Invalid value: Valid value range is empty: 0
E/flutter ( 6730): #0 List.[] (dart:core-patch/growable_array.dart:264:36)
E/flutter ( 6730): #1 PerceptualHash.calcPhash (package:image_compare_2/src/algorithms.dart:400:28)
E/flutter ( 6730): #2 PerceptualHash.compare (package:image_compare_2/src/algorithms.dart:382:17)
E/flutter ( 6730): #3 compareImages (package:image_compare_2/src/functions.dart:26:26)
E/flutter ( 6730):
E/flutter ( 6730): #4 _ImageCompareState.compare (package:flutter_application_1/main.dart:95:9)
E/flutter ( 6730):
E/flutter ( 6730):

my code;

import 'dart:developer';
import 'dart:io';

import 'package:flutter/material.dart';
import 'package:image_compare_2/image_compare_2.dart';
import 'package:image_picker/image_picker.dart';
import 'package:wakelock_plus/wakelock_plus.dart';

void main() {
WidgetsFlutterBinding.ensureInitialized();
WakelockPlus.enable();
runApp(const MyApp());
}

class MyApp extends StatelessWidget {
const MyApp({super.key});

@OverRide
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
useMaterial3: true,
),
home: const ImageCompare(),
);
}
}

class ImageCompare extends StatefulWidget {
const ImageCompare({super.key});

@OverRide
State createState() => _ImageCompareState();
}

class _ImageCompareState extends State {
File? image1;
File? image2;
double diff = 0.0;
@OverRide
Widget build(BuildContext context) {
return Scaffold(
floatingActionButton: FloatingActionButton(
onPressed: () => compare(image1!, image2!),
),
body: SafeArea(
child: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
TextButton(
onPressed: () async {
image1 = await pickImage();
},
child: const Text('image 1'),
),
const SizedBox(height: 20),
TextButton(
onPressed: () async {
image2 = await pickImage();
},
child: const Text('image 2'),
),
const SizedBox(height: 20),
Text("Difference: ${diff.toStringAsFixed(0)}%")
],
),
),
),
);
}

Future<File?> pickImage() async {
final ImagePicker picker = ImagePicker();
final XFile? image = await picker.pickImage(
source: ImageSource.camera,
imageQuality: 10,
maxHeight: 400,
maxWidth: 400);
if (image != null) {
log(image.path);
return File(image.path);
} else {
return null;
}
}

void compare(File file1, File file2) async {
log(file1.path);
log(file2.path);

var networkResult =
    await compareImages(src1: file1, src2: file2, algorithm: PerceptualHash());

// ignore: avoid_function_literals_in_foreach_calls
setState(() => diff = networkResult * 100);
log('Difference: ${(networkResult * 100)}%');

}
}