According to Techcrunch, Google Lodges Patent For Reading Text In Images And Video. The extension of the application would be that images and video indexed by Google would be searchable by the text located within the image or video itself, a big step forward in indexing that has not previously been available. Google has figured out how to ‘read’ non-text images. This could be included in the algorithm.
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Google Lodges Patent For Reading Text In Images And Video