A Multimodal Approach for Measuring Item Similarity
An innovative method for measuring similarity between items using concepts from image recognition and NLP, applied to e-tourism destinations
Teaching AI to Think Like a Travel Expert
Have you ever wondered how travel websites know that if you’re interested in Paris, you might also love Rome? Or why flight booking sites suggest destinations that perfectly match your travel style? The secret lies in similarity algorithms – the invisible matchmakers of the digital world.
But here’s the problem: traditional similarity methods are broken. They either need armies of experts to manually tag destinations or require massive amounts of user data that many companies don’t have. What if we could teach AI to understand destination similarity just like humans do – by looking at pictures and reading descriptions?
The Challenge: Beyond Simple Comparisons
Travel is personal. When you’re choosing between Bali and the Maldives, you’re not just comparing flight prices – you’re comparing vibes, experiences, cultural richness, and countless intangible factors that make each destination unique.
Current travel recommendation systems often fail because they rely on:
- ❌ Expert knowledge that’s expensive and limited
- ❌ User behavior data that many companies lack
- ❌ Simple categories that miss nuanced similarities
- ❌ Single-method approaches that ignore the complexity of human preferences
Our Revolutionary Solution: Multimodal AI
We’ve cracked the code by combining computer vision and natural language processing – teaching AI to “see” destinations through photos and “understand” them through descriptions, just like humans do.
🖼️ Visual Intelligence
Our AI analyzes destination images to understand:
- Architectural styles and cultural aesthetics
- Natural landscapes and environmental features
- Activity types and tourism infrastructure
- Atmosphere and mood captured in photographs
📝 Language Understanding
Simultaneously, our system processes text descriptions to extract:
- Cultural characteristics and local experiences
- Activity offerings and adventure types
- Climate patterns and seasonal attractions
- Travel styles and visitor demographics
🧠 Human-AI Collaboration
The magic happens when we combine these insights and compare them against real human judgments, creating a similarity system that thinks like a travel expert but scales like a computer.

Why This Matters: Real-World Impact
🌍 For Travelers
Imagine getting destination recommendations that truly understand your travel personality:
- Discover hidden gems that match your preferred style
- Find alternatives when your dream destination is too expensive or crowded
- Explore confidently knowing recommendations align with your interests
- Save time with intelligent filtering that gets smarter with each search
✈️ For Travel Companies
Our technology transforms how travel businesses connect with customers:
- No expert setup required – works with any destination database
- Instant deployment using only photos and descriptions
- Better conversion rates through personalized recommendations
- Competitive advantage with AI-powered customer insights
🔬 Beyond Tourism
The implications extend far beyond travel:
- E-commerce platforms can recommend products based on visual similarity
- Real estate websites can suggest properties with similar aesthetic appeal
- Entertainment services can match content based on visual and textual cues
- Any industry dealing with complex, multi-faceted similarity can benefit
The Technical Breakthrough
🎯 No Single Winner, So We Combined Them All
Our research revealed a crucial insight: no single AI method captures the full complexity of human similarity judgments. So we created a hybrid approach that:
- Combines visual analysis with natural language processing
- Balances multiple similarity dimensions automatically
- Adapts to different types of destinations and preferences
- Learns from human feedback to continuously improve
📊 Validated Against Human Experts
We didn’t just build another algorithm – we tested it against real human similarity judgments to ensure our AI truly thinks like people do.
🚀 Ready for Real-World Deployment
Unlike research that stays in labs, our method is:
- Scalable to millions of destinations
- Fast enough for real-time recommendations
- Flexible enough to work across different domains
- Practical enough for immediate commercial use
Related Publications
2024
- Warm Recommendation: Enhancing Cold Start Recommendations Using Multimodal Product Representations2024International Conference on Information Systems (ICIS)
- Measuring Flight-Destination Similarity: A Multidimensional Approach2024Expert Systems with Applications