Research

E-commerce and Multimodal AI

Multimodal AI that fuses computer vision and NLP to measure item similarity the way humans do, and studies of how people shop online across devices, for smarter recommendations in tourism, e-commerce, and real estate.

Headline result: Vision + language + time for product similarity.

Papers
7
Years
2020–2026
Co-authors
3

Overview

When humans judge similarity, they consider appearance, function, atmosphere, and context simultaneously. Simple text matching or category tags miss most of this. We develop multimodal AI that fuses computer vision and NLP to measure item similarity the way people actually experience it.

The Challenge

Two hotels can look similar in photos but feel completely different in reviews. Two tourist destinations can share atmosphere despite different geographies. Traditional similarity metrics capture one dimension at a time — and fail at the nuanced comparisons that drive real user decisions.

Our Approach

  • Visual Feature Extraction — Deep convolutional networks and vision transformers extract semantic features (architectural style, landscape type, activity level, color palette) directly from images without manual annotation.
  • Textual Semantic Analysis — Large language models encode review text and descriptions to capture cultural character, climate, offerings, and subjective user sentiment as dense semantic vectors.
  • Multimodal Fusion — Cross-attention mechanisms align visual and textual embeddings into a unified similarity space, validated against human expert judgments across thousands of item pairs.

Applications

  • Tourism & Travel Recommendations — Suggesting alternative destinations when a user's top choice is unavailable, matched on experience rather than category. Validated against real booking patterns.
  • E-commerce & Real Estate — Finding visually and contextually similar products or properties at different price points, improving discovery and reducing search abandonment.
  • Shopping Across Devices — How the conversion funnel differs between mobile and desktop consumers, and what that means for online retailers (Electronic Commerce Research and Applications, 2022).
Tourism destinations
Our AI analyzes visual and textual features of destinations to build similarity judgments that match human intuition across diverse travel contexts.

In plain words

Explainers of this line's papers for readers outside the field.

People on this line

The 3 most frequent of 3 co-authors on this line since 2020.

Ranked by joint papers in this line. The bar under each name spans their years on it, 2020 to 2026. A ring marks a student of the lab (1 of 3 co-authors here). Everyone on the Lab page

Papers

7 publications, newest first.

All publications

2026

  1. Product Pricing by Multidimensional Similarity: A Multimodal Attention Framework Using Image, Text, and Temporal Representations

    Eylon Yehiel, Anat Goldstein, and Chen Hajaj

    ConferenceProceedings of the 20th ILAIS Conference Student-led

    Explainer

2024

  1. Warm Recommendation: Enhancing Cold Start Recommendations Using Multimodal Product Representations

    Anat Goldstein, Amit Alony, and Chen Hajaj

    ConferenceInternational Conference on Information Systems (ICIS)

    Explainer
  2. Selected: Measuring Flight-Destination Similarity: A Multidimensional Approach

    Anat Goldstein and Chen Hajaj

    JournalExpert Systems with Applications SJR Q1

    DOI

2023

  1. Warming Up the Cold Start: A Multimodal Approach

    Anat Goldstein and Chen Hajaj

    ConferenceSpecial Interest Group on Decision Support and Analytics (SIGDSA) Symposium

2022

  1. The Hidden Conversion Funnel of Mobile vs. Desktop Consumers

    Anat Goldstein and Chen Hajaj

    JournalElectronic Commerce Research and Applications SJR Q1

    DOI
  2. Measuring Product Similarity: A Multidimensional Approach

    Anat Goldstein and Chen Hajaj

    ConferenceStatistical Challenges in E-Commerce Research (SCECR)

2020

  1. The Different Path to Purchase of Mobile and Desktop Consumers: Analyzing Consumers’ Progress in the Conversion Funnel Using Hidden Markov Models

    Anat Goldstein and Chen Hajaj

    ConferenceStatistical Challenges in E-Commerce Research (SCECR)

Work on this

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