What do you understand about how each system works to index-retrieve images? Manually Index...
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![Page 1: What do you understand about how each system works to index-retrieve images? Manually Index Expensive but effective.](https://reader035.fdocuments.net/reader035/viewer/2022081603/56649f565503460f94c79aed/html5/thumbnails/1.jpg)
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![Page 5: What do you understand about how each system works to index-retrieve images? Manually Index Expensive but effective.](https://reader035.fdocuments.net/reader035/viewer/2022081603/56649f565503460f94c79aed/html5/thumbnails/5.jpg)
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![Page 7: What do you understand about how each system works to index-retrieve images? Manually Index Expensive but effective.](https://reader035.fdocuments.net/reader035/viewer/2022081603/56649f565503460f94c79aed/html5/thumbnails/7.jpg)
What do you understand about how each system works to index-retrieve images?
Manually Index
Expensive but effective
![Page 8: What do you understand about how each system works to index-retrieve images? Manually Index Expensive but effective.](https://reader035.fdocuments.net/reader035/viewer/2022081603/56649f565503460f94c79aed/html5/thumbnails/8.jpg)
What do you understand about how each system works to index-retrieve images?
Visual Similarity (QBIC / Blobworld)
User makes a visual query (i.e. “I want image(s) that look like this”) – where “look like” is defined mathematically by the system (e.g. colour histograms, texture, shape)
![Page 9: What do you understand about how each system works to index-retrieve images? Manually Index Expensive but effective.](https://reader035.fdocuments.net/reader035/viewer/2022081603/56649f565503460f94c79aed/html5/thumbnails/9.jpg)
What do you understand about how each system works to index-retrieve images?
Use keywords in HTML (search engines)
?How to select the keywords?
Take from the filename / directory names
Take them from the ALT tag
??Maybe take them from the rest of the text on the webpage??
![Page 10: What do you understand about how each system works to index-retrieve images? Manually Index Expensive but effective.](https://reader035.fdocuments.net/reader035/viewer/2022081603/56649f565503460f94c79aed/html5/thumbnails/10.jpg)
What do you think are the strengths and weaknesses of each approach / system? What kinds of information needs / queries are they good for?
Manual indexing – good when there’s a business model
Visual Similarity – match patterns like trademarks, find a painting whose name you’ve forgotten, find images to match a colour schemes
Keywords in HTML – best we’ve got for general web searches