Hands-On Multimodal Recommendation Systems: Evolution Path from LightGBM to Deep Models

This article introduces the multimodal-recsys project published by yunacong on GitHub, which is based on the Amazon Reviews 2023 dataset. It demonstrates the complete technical evolution path from traditional machine learning (LightGBM) to CLIP feature fusion and then to deep models, providing a reference for learning and practicing multimodal recommendation systems.

Traditional collaborative filtering and ID models struggle to handle multimodal information such as product images and user reviews. Multimodal recommendation systems integrate multiple modalities like vision and text to build more comprehensive user interest models, which have become a key technology for improving experiences in e-commerce and other fields. This project provides a learning path from traditional to cutting-edge technologies.

The project adopts a progressive architecture:

1. LightGBM Baseline: Process structured features and provide a performance benchmark;
2. CLIP and Sentence-BERT Fusion: Use pre-trained models to extract semantic vectors from product images and text;
3. Deep Models: Include end-to-end architectures such as two-tower models, multimodal fusion networks, sequence models, and graph neural networks.

Dataset: Uses the Amazon Reviews 2023 Beauty category, including user-item interactions, product metadata, images, and review text; Experimental Results: Through comparisons of metrics like CTR and NDCG, the performance of each layer of the model gradually improves; Ablation experiments show that the visual modality is important for the beauty category, and the text modality has strong interpretability.

This project provides a complete multimodal recommendation learning case, demonstrates the technical evolution path, and offers reproducible code and experimental design for developers. It conveys systematic engineering thinking and helps understand the expansion of the boundaries of recommendation technology.

1. Use transfer learning with pre-trained models to improve performance;
2. Choose appropriate multimodal fusion strategies based on data and resources;
3. Adopt a progressive development path from baseline to complex models to reduce risks.