Image Tagging

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Image Tagging

  1. 1. Photography in Education TECH2113 Dr. Alaa Sadik Department of Instructional & Learning Technologies www.alaasadik.net [email_address]
  2. 2. Part 3 Editing & Enhancing Week 9 Image Tagging
  3. 3. Image Tagging <ul><li>Image tagging is embedding information about the image into the image file itself. The image can take the information with it wherever it goes. This information is called metadata. </li></ul>
  4. 4. Image Tagging <ul><li>By tagging an image you can embed a much broader and richer range of information into the image file, which could include anything from technical details, to copyright information, keywords, dates, full description and photographer details. </li></ul>
  5. 5. Image Tagging <ul><li>Traditionally this kind of information is stored with the image in a database, enabling you to search , retrieve and use images based on its metadata. </li></ul><ul><li>Practice: Tag some of the photos you have in your computer then search for images using the tags you just used. </li></ul>
  6. 6. Image Tagging <ul><li>Some photo editing programs are not “aware” of tags and just do not support them. </li></ul><ul><li>If an image is tagged, then it is important to find out what applications support the metadata format you use. </li></ul>
  7. 7. Types of Tagging Formats <ul><li>The most common formats at present are: </li></ul><ul><li>International Press Telecommunications Council format (IPTC) </li></ul><ul><ul><li>This format is supported by Microsoft image viewers and file management system. </li></ul></ul>
  8. 8. Types of Tagging Formats
  9. 9. Types of Tagging Formats <ul><li>EXchangeable Image File format (EXIF) </li></ul><ul><ul><li>EXIF was developed to enable digital still cameras to embed a range of technical camera data within an image file (such as height, width, date, time, orientation, camera make and resolution). </li></ul></ul>
  10. 10. Types of Tagging Formats <ul><li>eXtensible Metadata Platform ( XMP) </li></ul><ul><ul><li>Designed by Joint Photographic Experts Group (JPEG) committee's JPEG2000 (JP2). </li></ul></ul><ul><ul><li>This format is used by Adobe Photoshop 7 and later versions (via the File Info option in Photoshop). </li></ul></ul>
  11. 11. Identifying Metadata Needs <ul><li>The following questions should be answered to determine what metadata you need to manage and use your photos: </li></ul><ul><li>What is the main objective behind the creation of the photo collection? </li></ul><ul><li>How is this collection will be hosted and managed? </li></ul><ul><li>What metadata do users need or expect? </li></ul>
  12. 12. Identifying Metadata Needs <ul><li>The following questions should be answered to determine what metadata you need to manage and use your photos: </li></ul><ul><li>What metadata do you need to manage the collection? </li></ul><ul><li>What are others with similar collections doing? </li></ul><ul><li>Are there any institutional, technological or legal demands I need to consider? </li></ul>
  13. 13. Identifying Metadata Needs <ul><li>The following questions should be answered to determine what metadata you need to manage and use your photos: </li></ul><ul><li>What metadata do you already have? </li></ul><ul><li>Who can contribute to the metadata? </li></ul><ul><li>How much time/money can you afford to spend on creating metadata? </li></ul>
  14. 14. Discussions & Notes for - Mid-term exam results - Uploading and sharing photos using Flick r and Photo repository.

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