Multimedia Content Audit and Consistency Verification System Based on Multimodal AI

This project builds a web system integrating multimodal AI technologies such as BLIP, CLIP, and OCR to verify the consistency between multimedia files (images, videos, PDFs, etc.) and user descriptions. The system adopts a front-end and back-end separation architecture, solving the problems of low efficiency in traditional manual audits and the inability of pure text matching to handle rich media content. It can be applied to multiple scenarios such as e-commerce, content platforms, and enterprise document management, greatly improving content management efficiency.

In the era of digital content explosion, content platforms face the challenge of ensuring that user-uploaded multimedia files match their descriptions: traditional manual audits are low-efficiency and high-cost; pure text matching cannot handle rich media such as images and videos. This project is positioned as a complete web application, with the core function of evaluating the fit between uploaded files and user descriptions (outputting a 0-100% matching score). It is suitable for scenarios such as e-commerce to verify the consistency of product images and text, content platforms to audit compliance, and enterprise document management to ensure annotation accuracy.

Front-end Tech Stack

Built with React ecosystem + Vite, the component-based architecture is clear and maintainable, and Vite's hot reload accelerates development iteration.

Back-end Tech Stack

Developed based on the Python FastAPI framework, combined with the Uvicorn ASGI server, it provides high-performance asynchronous support for handling I/O-intensive tasks such as file uploads and efficiently responds to concurrent requests.

Image Understanding

Use the BLIP model to generate image descriptions and capture key information such as objects and scenes; combine the CLIP model to calculate the semantic similarity between images and text; extract text from images via EasyOCR for keyword matching.

PDF Processing

Extract text with PyMuPDF, encode it into vectors via the Sentence-Transformers model to calculate semantic similarity.

Video Analysis

Extract key frames using an intelligent frame sampling strategy, process them according to the image flow, and take the highest matching score as the video score.

Hardware Optimization

Supports acceleration on NVIDIA GPU (CUDA) and Apple Silicon (MPS); automatically switches to CPU mode when no dedicated accelerator is available. Models are loaded locally after the first download from the Hugging Face Hub to avoid repeated overhead.

1. Request Reception: The front-end packages the file and description into multipart/form-data and sends it to the FastAPI back-end.
2. Type Recognition: The back-end identifies the file's MIME type and determines the processing branch.
3. Content Analysis: Call the corresponding model combination according to the file type (each of image/video/PDF has its own process).
4. Score Calculation: Generate a 0-100% matching score by synthesizing the results of various models.
5. Result Return: The score and visual feedback are returned to the front-end for display.

Existing Application Scenarios

• E-commerce platforms: Verify the consistency between product images and descriptions to reduce disputes over mismatched goods.
• Content audit: Automatically identify non-compliant content (e.g., inconsistent text and images, false advertising).
• Document management: Ensure accurate metadata annotation of archived files to improve retrieval efficiency.
• Educational assessment: Verify whether students' assignment materials meet the requirements of the topic.

Future Expansion Directions

Introduce audio analysis support, add fine-grained content classification tags, and integrate user feedback mechanisms to optimize model performance.

Local Deployment

Requires Python 3.10+ and Node.js 18+ environments. It is recommended to use a Python virtual environment to manage dependencies for easy maintenance and version control.

Production Environment

Consider model memory usage and GPU resource scheduling; for high-concurrency scenarios, it is recommended to deploy models as services, decouple web services from AI inference, and implement load balancing via message queues or RPC.

The maturity of multimodal AI technology is changing the way content is audited. This project integrates cutting-edge models such as BLIP, CLIP, and OCR to build a practical multimedia consistency verification system. With the development of multimodal large language models, the accuracy and versatility of the system will be further improved, providing stronger technical support for digital content governance.