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Friday, March 30, 2007 

Nokia Search Engine?

With the rumors about Google phone running wild, what is poor Nokia to do? Well, mobile search is in pretty embryonic stage right now. So if Google want’s it’s own smartphone, we want our own search engine says Nokia.

That’s right, Nokia seems to be working on it’s own visual search engine. At least that’s what its patent application called “Semantic visual search engine” is telling us.

nokia-visual-search-engine.jpg

Nokia Visual Search Engine comprises three related processes: learning, categorizing and searching:

When analyzing the images, at first they are converted into a plurality of candidate low-level features (like shape, color and texture strength) and these features are extracted locally around salient points of the image.

Then a supervised learning approach is used to select prominent low-level features from the plurality of candidate low-level features. The prominent low-level features are associated with predefined object categories, that describe generic objects (e.g., cars, planes, etc.); parts of a person’s body (e.g., faces), geographical landmarks (e.g., mountains, trees. etc.), or other items.

When a new item is to be categorized, the target item is converted into a plurality of multi-scale local features and then each local feature is matched with the prominent low-level features using a probabilistic model. So, if the target item has a face, then this feature will be matched accordingly to the other items having a face and the item will be categorized.

The user can search for images by entering keywords, keywords and template images or just image templates without keywords. Items that are similar to the input item are then provided to the user in response to the inquiry.

I am no visual search engine algorithm expert, so I’m not sure if the claims in the patent are new, unique or very useful. But the fact, that Nokia is working in this direction at all, sounds pretty interesting.

nokia-visual-search-engine-image-feature-extraction.jpg

And some quips in the patent provide hints that Nokia may have much bigger ambitions for it’s search engine, then just searching for images inside of your cellphone

“…it should be noted that, although “images” are explicitly discussed herein, the present invention can also be applied to non-image content such as audio files...” - general media search engine for audio and video files as well?

“…it should be noted that the search results can also comprise results of a search performed locally and/or at a remote location, and the items being searched can be located locally and/or remotely…This invention can also be implemented in hardware and used in consumer devices….” - sounds like a general Web visual search engine for mobile devices.

Are we looking at the great Google vs Nokia showdown somewhere in 2010?

source: Unwired View

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Pedro "K2" Macêdo

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