• Format used in ViPER suite
• Originally defined for evaluation purposes
• First uses include:
  • Text detection
  • Face detection
  • Person detection

• It is a record describing some element of the video.
• It is an object that conforms to a user defined schema.
• It is composed of several named, typed attributes.
• Has a unique id and an associated span in which it is valid.
• One of three types: File, Content, or Object

  File

  Refers to data that reflects the video as a whole, or other metadata about the video, such as file format and frame rate.

  Content

  Instances of this type may only occur one at a time, and any given instance may not change over the course of its life. Each instance has a time span and a set of attributes.

  Object

  Refers to an object that may have many instances at any given time, and whose instances may change over time.

• Each descriptor has several attributes.
• An attribute can be one of several data types:

  svalue

  strings of characters

  lvalue

  enumerated value: one of several user defined words

  bbox, polygon, etc.

  one of several different shapes

  reference

  reference to another descriptor

• Simple XML based format.
• The config section defines the descriptors
• The data section instantiates descriptors for one or more media files

example one

example two

example three

viper structure

data types

1. viper
   1. config
      • descriptor definition
      • descriptor definition
   2. data
      • sourcefile
        • descriptor
      • sourcefile
        • descriptor