Storing Image Information

eVe stores two types of information about an image: its visual signature, and any textual metadata associated with the image. Together, this information constitutes a MediaObject.

  Mediaobjects. A MediaObject contains a single image and all the information related to that image. This information includes:

• image properties such as height, width, size, etc
   

• signatures that capture the visual content (color, texture, shape, object)
   

• segmentation map
   

• thumbnail of the original image (original image itself if it is smaller than 128x128)
  
• path to the location of the original image
  
• date and time when the image was analyzed
  
• statistics related to the analysis process

MediaObjects can be stored as EDF (Eve Data Format: eVe’s representation of an image, already broken down into signatures) files on disk or in a database.

  MediaCollections. The sample UI included with the eVe SDK refers to MediaCollections as Categories. A MediaCollection is a container for multiple MediaObjects. Searching operates on individual MediaCollections. MediaCollections are stored in either a database or in a filesystem. MediaCollections contain four types of information:

• Indexes are always stored on disk.
   

• MediaCollection properties are always stored on disk. Currently, the only property is the collection name, but a property can be any serializable object.
   

• MediaObjects can be stored on disk or in the database, but you cannot “mix and match” the locations: all MediaObjects in the MediaCollection must be either in the database or on disk.
   

• MediaObject metadata can be file-based or contained in the database, but as with MediaObjects, you cannot “mix and match” the locations.