PlagiarismCheckerPlus
A Flutter package for detecting text similarity and potential plagiarism using Cosine Similarity and Jaccard Similarity algorithms. This package provides flexible options for algorithm selection, customizable similarity thresholds, and detailed analysis results.
Features
🔍 Multiple Algorithms: Choose between Cosine Similarity, Jaccard Similarity, or use both
🎚️ Customizable Threshold: Set your own similarity threshold for plagiarism detection
📊 Detailed Analysis: Get comprehensive similarity scores and results
🚀 Easy Integration: Simple API for quick implementation
⚡ Efficient Performance: Optimized for both small and large text comparisons
Installation
Add plagiarism_checker_plus
to your pubspec.yaml
:
dependencies:
plagiarism_checker_plus: ^1.0.3
Then, install the package:
flutter pub get
Usage
Basic Example
import 'package:plagiarism_checker_plus/plagiarism_checker_plus.dart';
void main() {
final checker = PlagiarismCheckerPlus(
algorithm: Algorithm.both, // Uses both Cosine and Jaccard Similarity
threshold: 0.5, // Default threshold for similarity
);
final text1 = "This is a sample text for testing similarity.";
final text2 = "This is another sample text used for similarity testing.";
final result = checker.check(text1, text2);
print("Similarity Score: ${result.similarityScore}");
print("Algorithm Used: ${result.algorithm}");
print("Is Plagiarized: ${result.isPlagiarized}");
}
Algorithm Selection
Using Cosine Similarity
final checker = PlagiarismCheckerPlus(
algorithm: Algorithm.cosine,
threshold: 0.5,
);
Using Jaccard Similarity
final checker = PlagiarismCheckerPlus(
algorithm: Algorithm.jaccard,
threshold: 0.4,
);
Using Both Algorithms
final checker = PlagiarismCheckerPlus(
algorithm: Algorithm.both,
threshold: 0.5,
);
API Reference
PlagiarismCheckerPlus
Main class for initializing the checker with desired settings.
Parameters
algorithm
: The algorithm to use (Algorithm.cosine
,Algorithm.jaccard
, orAlgorithm.both
)threshold
: Similarity score threshold (0.0 to 1.0) for determining plagiarism
PlagiarismResult
Result object returned by the check function.
Properties
score
: Similarity score between the two texts (0.0 to 1.0)algorithm
: Algorithm(s) used in the calculationisPlagiarized
: Boolean indicating if similarity meets/exceeds threshold
How It Works
Cosine Similarity
- Transforms text into vectors
- Calculates the cosine of the angle between vectors
- Effective for capturing semantic similarity
Jaccard Similarity
- Measures similarity based on word intersection/union
- Ideal for direct word overlap comparison
- Handles varying text lengths well
Limitations
- Currently optimized for English and Latin-alphabet languages
- Similarity scores may vary based on text complexity
- Large texts may require additional processing time
Future Plans
- Support for additional similarity algorithms
- Enhanced multilingual support
- Detailed matching report with highlighted similarities
- Performance optimizations for large texts
Contributing
Contributions are welcome! Please see our Contributing Guidelines for details.
License
This package is available under the MIT License. See the LICENSE file for more details.
Support
For bugs and feature requests, please create an issue on GitHub.
Example App
Check out the complete example app in the example
directory:
cd example
flutter run
Additional Resources
Libraries
- plagiarism_checker_plus
- A library for checking plagiarism using various similarity algorithms.