MINI PROJECT 2023 deepfake detection.pptx

Deepfake detection is a critical and evolving field aimed at identifying and mitigating the risks associated with manipulated multimedia content created using artificial intelligence (AI) techniques. Deepfakes involve the use of advanced machine learning algorithms, particularly generative models like Generative Adversarial Networks (GANs), to create highly convincing fake videos, audio recordings, or images that can deceive viewers into believing they are genuine.

One prevalent approach to deepfake detection involves leveraging advancements in computer vision and pattern recognition. Researchers and developers employ sophisticated algorithms to analyze various visual and auditory cues that may indicate the presence of deepfake manipulation. For instance, anomalies in facial expressions, inconsistent lighting and shadows, or unnatural lip sync in videos can be indicative of deepfake content. Additionally, deepfake detectors may examine metadata, such as inconsistencies in timestamps or editing artifacts, to identify alterations in the content's authenticity.

Machine learning plays a central role in deepfake detection, with models being trained on diverse datasets that include both authentic and manipulated content. Supervised learning techniques involve training models on labeled datasets, enabling them to recognize patterns associated with deepfake manipulation. Researchers also explore unsupervised and semi-supervised learning methods, allowing detectors to identify anomalies without explicit labels for every training instance.

As the field progresses, deepfake detectors are increasingly adopting advanced neural network architectures to enhance their accuracy. Ensembling multiple models, each specialized in detecting specific types of manipulations, is another strategy employed to improve overall detection performance. Furthermore, the integration of explainable AI techniques enables better understanding of the detection process and provides insights into the features contributing to the decision-making process of the models.

Despite these advancements, deepfake detection remains a challenging task due to the constant evolution of deepfake generation techniques. Adversarial training, where detectors are trained on data that includes adversarial examples, is one method to improve robustness against sophisticated manipulation attempts. Continuous research efforts are required to stay ahead of emerging deepfake technologies and to develop detectors capable of identifying novel manipulation methods.

In conclusion, deepfake detection is a multidimensional challenge that requires a combination of computer vision, machine learning, and data analysis techniques. Researchers and practitioners are actively developing and refining methods to detect manipulated content by examining visual and auditory cues, leveraging machine learning models, and staying vigilant against evolving deepfake technologies. As the threat landscape evolves, ongoing innovati

1. Introduction Deep fake videos are realistic manipulated media created using advanced artificial intelligence techniques like deep learning. They pose a significant threat as they can spread misinformation and manipulate public opinion. The goal of this project is to develop an effective deep fake video detection system to identify and combat the spread of deep fake content. The detection of deep fake videos has become a critical need in the current digital age, where misinformation can have severe real-world consequences.

2. What are deepfake videos? A deepfake video is a type of manipulated media that uses artificial intelligence (AI) and deep learning techniques to alter or replace the original content in a video. The term "deepfake" is derived from "deep learning" and "fake," signifying the use of deep neural networks to create convincingly realistic but fabricated videos. Deepfake technology has gained significant attention due to its potential to create highly deceptive and sophisticated fake videos that appear genuine.

3. Dataset For making the model efficient for real time prediction. We have gathered the data from different available data-sets like FaceForensics ++ and Celeb-DF. To avoid the training bias of the model we have considered 50% Real and 50% fake videos. We have taken 500 Real and 500 Fake videos from the FaceForensics ++ dataset and 500 Real and 500 Fake videos from the Celeb- DF dataset. Which makes our total dataset consisting 1000 Real, 1000 fake videos and 2000 videos in total.

4. Preprocessing The first steps in the preprocessing of the video is to split the video into frames. After splitting the video into frames the face is detected in each of the frame and the frame is cropped along the face. The frame that does not contain the face is ignored while preprocessing. • Using glob we imported all the videos in the directory in a python list. • cv2.VideoCapture is used to read the videos and get the mean number of frames in each video.

5. Data Flow Diagram

6. Use Case Diagram

7. Architecture of the system

8. Working Our model is a combination of CNN and RNN. We have used the ResNext CNN model to extract the features at frame level and based on the extracted features a LSTM network is trained to classify the video as deepfake or pristine. ResNext is Residual CNN network optimized for high performance on deeper neural networks. LSTM is used to process the frames in a sequential manner so that the temporal analysis of the video can be made, by comparing the frame at ‘t’ second with the frame of ‘t-n’ seconds. Where n can be any number of frames before t.

9. Working The User Interface for the application is developed using the integration of Flask with front end ReactJS. Flask is a popular Python web framework that is widely used for developing web applications. The first page of the User interface contains a tab to browse and upload the video. The uploaded video is then passed to the model and prediction is made by the model. The model returns the output whether the video is real or fake along with the confidence of the model.

10. Technologies Used Python & Google Colab – Model Building Frontend - ReactJS Backend server – Flask Libraries – torch, face_recognition , cv2, numpy , pandas, matplotlib etc.

11. Results - Snapshots

12. Confusion Matrix

13. Server terminal

14. Client terminal

15. Applications Media Integrity: Maintains the credibility of media content and prevents the dissemination of false information. Fake News Prevention: Helps counter the propagation of misinformation in news articles and social media. Content Verification: Authenticates video content, vital for legal, investigative, and sensitive contexts. Security and Fraud Prevention: Identifies unauthorized impersonation, thwarting security breaches and fraud. Election Integrity: Ensures elections remain unaffected by manipulated videos that could influence voters. Entertainment Safeguard: Protects celebrities' reputation and prevents illicit use of their likeness. Social Media Safety: Enhances user safety by removing harmful or deceptive deepfake content. Forensic Analysis: Verifies video evidence for use in criminal investigations.

16. Future Enhancements Real-time Detection: Optimize the model for real-time detection scenarios, enabling swift identification of deepfake content in live streams. Multimodal Analysis: Extend the detection to multimodal data, such as audio and metadata, to create a more comprehensive deepfake detection system. Dataset Expansion: Continuously update and expand the training dataset to encompass emerging deepfake techniques and variations.

17. THANK YOU