Exploration of Multimodal Deep Learning Application in Commodity Price Prediction

This article introduces a commodity price prediction project combining text and image data. The core idea is to integrate DistilBERT text encoding and CNN image features for multimodal modeling, aiming to provide technical references for intelligent pricing in e-commerce scenarios. The project adopts a progressive development strategy: the text baseline model has been completed, and the image model and multimodal fusion stages will be advanced next. It has a solid engineering practice foundation and is of reference value for beginners in multimodal learning.

In today's booming e-commerce era, commodity pricing strategies directly affect merchants' competitiveness and profit margins. Traditional pricing relies on manual experience or simple statistical analysis, which struggles to capture semantic information from product descriptions and visual features from images. With the maturity of deep learning technology, using multimodal data for price prediction has become feasible. This project is a degree thesis-level research project, aiming to integrate commodity text descriptions (title, details, quantity) and images to build an end-to-end multimodal price prediction model, which has important application value for e-commerce platforms, second-hand trading markets, and dynamic pricing systems.

Technical Architecture

The project adopts progressive development, divided into three stages:

1. Text Baseline Model: DistilBERT (a distilled version of BERT, retaining 97% performance, reducing parameter count by 40%, and increasing inference speed by 60%) is selected to extract text semantic features and output price predictions. It can understand subtle differences like "brand new unopened" and "90% new".
2. Image Model: Plan to introduce CNN to process commodity images, extract visual clues such as appearance, brand, and condition, supplementing information hard to express in text (e.g., mobile phone condition, accessory completeness).
3. Multimodal Fusion: The goal is to fuse text and image features, which requires solving the modal alignment problem. Fusion strategies to be selected include early, late, or middle fusion.

Engineering Practice

• Project Structure: Modular design, the src directory includes data (data processing), models (model definition), training (training scripts), and utils (auxiliary functions), ensuring strong maintainability.
• Experiment Management: Hyperparameters (learning rate, maximum sequence length, training epochs, etc.) are managed via the Experiments.txt configuration file. It supports command-line configuration specification, and results are saved to outputs/models/.
• Technical Dependencies: Based on the PyTorch ecosystem, including PyTorch, Hugging Face Transformers, pandas&numpy, scikit-learn, etc.

Multimodal price prediction technology has broad application prospects:

1. Second-hand Trading Platforms: Automatically evaluate commodity value, provide pricing suggestions for sellers, and price references for buyers.
2. E-commerce Dynamic Pricing: Adjust pricing strategies in real time based on product descriptions and image quality.
3. Inventory Management Systems: Predict price elasticity of slow-moving goods and optimize clearance strategies.
4. Auction Auxiliary Systems: Provide data-driven bidding suggestions for auction participants.

Challenges

• Data Scarcity: Multimodal commodity datasets with accurate price labels are relatively scarce.
• Modal Imbalance: The contribution weights of text and images to price may vary by commodity category.
• Market Volatility: Prices are affected by factors like supply and demand, seasons, so the model needs time generalization ability.

Future Directions

• Introduce more modalities (e.g., user reviews, sales history).
• Explore the application of attention mechanisms in cross-modal alignment.
• Deploy the model as a real-time API service.

This project demonstrates complete machine learning engineering practice: from problem definition, technology selection, architecture design to experiment management, it reflects solid engineering literacy. Currently, only the text baseline model has been completed, but the clear phase planning and modular code structure lay a good foundation for subsequent development. For developers wanting to get started with multimodal learning, this is a reference project worth attention.