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Visual Search

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Amit Prabhudesai
Amit Prabhudesai

Visual search, also known as content-based image retrieval (CBIR), allows users to search for images using visual queries rather than text. The document outlines the basic components of a CBIR system, including image descriptors that extract features like color, shape, and texture, similarity measures to compare images, and indexing schemes to efficiently search large databases. It also discusses use cases for visual search in applications like product catalogs, engineering design, and law enforcement investigations. Performance is evaluated using precision and recall metrics to balance relevant results returned against total results retrieved.

Technologie
1 von 27
Visual Search A behind-the-scenes look at image retrieval Amit Prabhudesai SAIT-India
Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Why do we need visual search? How do I find what I’m looking for?!
What is visual search? Text query, textual results Text query, visual results Visual query, visual results 
 a.k.a. Visual Search
Visual search – use-cases ,[object Object],[object Object],[object Object],[object Object],Search by browsing 
 a.k.a. “show me similar content”
Uses-cases of visual search ,[object Object],[object Object],[object Object],[object Object],Search by example 
 a.k.a. “Show me all red-cars!”
Uses-cases (contd.) 
 ,[object Object],[object Object],[object Object],[object Object],Search by drawing 

Use-cases (contd.) 
 ,[object Object],[object Object],[object Object],[object Object],Search by category 

Applications of visual search ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Visual search a.k.a. Content Based Image Retrieval (CBIR) Block-diagram of a typical content-based image retrieval system Comparison Query Index Query Index Result Image database
Components of a CBIR system ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Image content descriptors ,[object Object],[object Object],[object Object],[object Object],[object Object]
Image content descriptors – Color ,[object Object],[object Object],[object Object],[object Object],[object Object]
Image descriptors – Color Apples are red 
 
 But tomatoes are too!!!
Image descriptors – Color ,[object Object],[object Object],[object Object],[object Object],[object Object]
Image descriptors - shape ,[object Object],[object Object],[object Object],[object Object]
Image descriptors – shape ,[object Object],[object Object],[object Object],[object Object],[object Object]
Image descriptors – Texture ,[object Object],[object Object]
Image descriptors – Texture Texture differentiates between a Lawn and a Forest
Image descriptors – Texture ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Image descriptors – spatial information ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The whole is greater than the sum of the parts!! ,[object Object],[object Object]
Similarity/distance measures ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Indexing scheme ,[object Object],[object Object],[object Object],[object Object]
Performance Evaluation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
What is out there? ,[object Object],[object Object],[object Object],[object Object]
Thank You

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Visual Search

  • 1. Visual Search A behind-the-scenes look at image retrieval Amit Prabhudesai SAIT-India
  • 2.
  • 3. Why do we need visual search? How do I find what I’m looking for?!
  • 4. What is visual search? Text query, textual results Text query, visual results Visual query, visual results 
 a.k.a. Visual Search
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  • 10. Visual search a.k.a. Content Based Image Retrieval (CBIR) Block-diagram of a typical content-based image retrieval system Comparison Query Index Query Index Result Image database
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  • 14. Image descriptors – Color Apples are red 
 
 But tomatoes are too!!!
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  • 19. Image descriptors – Texture Texture differentiates between a Lawn and a Forest
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