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2009-05-12 Multimedia S&R/Analysing

posted May 11, 2009, 3:14 PM by Unknown user   [ updated Jun 19, 2009, 9:51 PM by Eddie Woo ]

Class notes - 'analysing multimedia'

1. Multimedia as analysis, or multimedia being analysis?

Analysing is the process of giving meaning or purpose to data, turning it into information through analysis. Multimedia can be analysed, but multimedia can also be a type of analysis - 'graphically representing' is one of the many methods of data analysis.

This is an example of how multimedia can be the input for analysis, but how it can also be the output for analysis:

2. How can multimedia be analysed? What is actually analysed?

  • Metadata
    • Tags
      • Geotaggging
      • Face-tagging (face recognition)
      • Face detection
    • "Multimedia blogroll"
    • Tags/categories
    • Captions
    • Subtitles
    • EXIF data ("camera data")
      • ISO sensitivity
      • Aperture (f-number)
      • Shutter speed
      • Time and date
      • Camera model
  • Content
    • Bit depth
    • Palette
    • Resolution
    • Sampling rate
    • Voice recognition
    • Text-to-speech
    • Voice detection

Storing and retrieving multimedia

For further details, refer to IPT: S&R Multimedia, part 2
  1. Some services include: YouTube, iTunes, Facebook, Veoh, myspace, Bebo, Dailymotion, Google, Limewire, Flickr, deviantART, Photobucket, Picasa, Ph.Art
  2. Such services are popular because they are free, and are superior to alternative ways of network storage (such as email) which are not specialised for multimedia and hence are not ideal. For example, Picasa allows for name-tagging, viewing metadata, geo-tagging, and various other things that simple data storage sites cannot do.
  3. I select image-sharing sites deviantART, Flickr, and Picasa. deviantART is specialised for presenting artwork, which is demonstrated by the emphasis on parallel commenting and feedback communication subsystems. Flickr is specialised for categorising images, demonstrated by the emphasis on sophisticated metadata systems, hence allowing the user to quickly locate items of interest. Finally, Picasa is specialised for use with personal images, demonstrated by features such as face-tagging.
  4. The unique benefits of this type of multimedia storage is that it is cheap. All the services mentioned are free (although some provide more storage when using paid accounts). Furthermore, because it is network storage, it is inherently more accessible, as any computer with an internet connection can access the aforementioned services.

Analysing multimedia

For further details, refer to IPT: Analysing Multimedia
  1.  "Analysing multimedia" is the use of the analysing process - giving meaning or purpose to data - where multimedia is the form of data that is being analysed. This is not the same as "multimedia as analysis", where multimedia information is the product of the analysis process being carried out on other data (not necessarily multimedia data, although "analysing multimedia" and "multimedia as analysis" are certainly not mutually exclusive)
  2. Recalling that one form of analysis is "graphically representing" data, multimedia is highly suited to the form of analysis that involves the use of graphical representations such as line graphs and pie charts. Multimedia is also suited to modeling, labeling, and identifying patterns and trends in general.
  3. The MIS (Google Analytics) used to monitor the school intranet uses multimedia very effectively for the purpose of analysis. In addition to a plethora of graphs and charts, this MIS also makes use of a world map to identify where users are geographically situated (according to their internet service providers)
  4. Multimedia is a very efficient usage of information systems for data analysis, used primarily in labeling, graphically representing, and modeling data. However, it is not the most useful too by far, as there are other highly important tools for analysis, such as the query (search) and sort tools used in database systems.
  5. Geotagging involves identifying the longitude and latitude of where a multimedia file was created, and has the benefit of allowing for further analysis, e.g. sorting by location or searching by location; face-tagging involves identifying faces in image, animation, or video data, and has the benefit of allowing for further analysis involving people, e.g. counting how often certain faces appear in a set of multimedia files; captions, categories, voice recognition, metadata, EXIF data (also metadata) have similar applications and benefits
  6. Multimedia was seldom analysed in the past due to the inability for computers to handle multimedia adequately, and the relative difficulty of analysing multimedia using manual/NCB methods - however, such analysis still occured (e.g. sorting and labeling photographs in a photo album)
Eddie Woo,
Jun 19, 2009, 9:52 PM