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Visual Search

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Amit Prabhudesai
Amit Prabhudesai

Look at basics of image retrieval, some existing solutions and technology and challenges.

Technologie
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Visual Search aka Content-based Image Retrieval Amit Prabhudesai, SISO
Outline ,[object Object],[object Object],[object Object],[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?!
Some telling numbers … ,[object Object],[object Object],[object Object],[object Object],Source: http://www.facebook.com/note.php?note_id=76191543919
Searching Images is like …
What is visual search? Text query, textual results Text query, visual results Visual query, visual results … a.k.a. Visual Search
A Picture speaks better than … Visual search – why type when you can see it : http://bit.ly/3WMh6D
Visual search – specifying queries
Visual search – specifying queries
Visual search – specifying queries Snap a picture of something you like & upload it!
Visual search – use-cases ,[object Object],[object Object],[object Object],[object Object],Search by browsing … a.k.a. “show me similar content”
Visual search – use-cases ,[object Object],[object Object],[object Object],[object Object],Search by drawing … Searching for LOVE ? ;)
Uses-cases … ,[object Object],[object Object],[object Object],[object Object],Search by example … a.k.a. “Show me all red-cars!”
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]
Applications of Visual Search … for the art collector & museum curator
Product catalogs … … searching product catalogs
GIS systems … … searching GIS data/maps
Searching picture archives … personal image collections, online databases (Google, Creative Commons)
Law Enforcement … … searching faces/fingerprints/crime-scene photos
Applications in the mobile space … ,[object Object],[object Object],[object Object],[object Object]
Visual search – Players in the mobile space An Overview: http://bit.ly/zolGg
Challenge – Sensory gap Limitation imposed by the sensor – not all information captured!
Challenge – Semantic Gap Difference between user-interpretation and machine-computed features
Visual search a.k.a. Content Based Image Retrieval (CBIR) Block-diagram of a typical content-based image retrieval system Comparison Query Index Index File 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
Image content descriptors – Color
Image content descriptors – Color ,[object Object],[object Object],[object Object],[object Object],[object Object]
Image descriptors – Color ,[object Object],[object Object],[object Object],[object Object],[object Object]
Problem with color descriptors …
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 - shape ,[object Object],[object Object],[object Object],[object Object]
Image descriptors – shape ,[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]
Similarity/distance metrics No one-size-fits-all!! Target application decides the metric to be used!
Indexing scheme ,[object Object],[object Object],[object Object],[object Object]
Performance Evaluation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Performance Evaluation
Gazopa – A Visual Search Engine A ‘colorful’ example ;)
Gazopa – apples are red … Or are they?
Man’s best friend …
The sky is the limit …
iLike… searching products
The right descriptor is important! This guy’s not going to be happy! OMG!!!
Bing Image Search Am I looking for motorcycles, logos, Company?!
Thank You

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Visual Search

Hinweis der Redaktion

  1. TODO: Update this slide
  2. Searching for the right image can be like searching for a needle in a haystack! Picture speaks better than thousand words, but how do you find the right pictures in the thousands (hundreds of thousands!) of pictures?!
  3. Growth of digital content is exponential; we need a way to index and search this content.
  4. Doing it well, and doing it fast is the challenge!
  5. Where does the search query come from?
  6. Mobile phone + internet access + search databases = Awesomeness!
  7. Include something on mobile space, this is esp. relevant to Samsung
  8. Mobile visual search: http://bit.ly/zolGg SnapTell: enhanced print-advertising; index covers books, CDs/DVDs, games Kooabs: Spin-off from ETH, Zurich (Luc Van Gool is one of the founders!) Idee: TinEye Mobile app for the iPhone Evolution robotics: primary licensee of D. Lowe’s SIFT patent