| 摘要 |
New metadata may be created based on data associated with a digital image file. A digital image file may include a digital image as well as metadata, which may be descriptive of the digital image. An application executing on a processing device may define a policy specifying the new metadata to be created, methods for creating the new metadata, and data sources of information used to derive the new metadata, as well as other information. Harvesters may harvest data according to the defined policy. A harvest manager may load and invoke harvesters, as requested by the application. The harvest manager may further determine whether the loaded harvesters are to use input provided by other unloaded harvesters and may automatically load the other unloaded harvesters, accordingly. The newly created metadata may be stored in the digital image file, a data set associated with the digital image file, and/or another location.
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