| 摘要 |
Methods and systems index and retrieve pixel data. Pixel data is received, and connected pixel components are identified. The connected pixel components are associated with segments. Spatial invariant features are extracted for each of the segments, and keys are acquired for each segment. The features and keys are associated with one another in a data store. In one embodiment, a scan of a portion of printed media is received as pixel data and associated with segments having spatial invariant features and keys. The invariant features and keys are searched in a data store for a match, and a pointer to an electronic image of the entire printed media is returned along with links to additional electronic data associated with the electronic image.
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