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Photography in Education
TECH2113Dr. Alaa SadikDepartment of Instructional & Learning Technologies
Part 3
Editing & Enhancing
Week 9
Image Tagging
Image Tagging
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.
Image Tagging
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.
Image Tagging
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.
Practice: Tag some of the photos you have in your computer then search for images using the tags you just used.
Image Tagging
Some photo editing programs are not “aware” of tags and just do not support them.
If an image is tagged, then it is important to find out what applications support the metadata format you use.
Types of Tagging Formats
The most common formats at present are:
International Press Telecommunications Council format (IPTC)
This format is supported by Microsoft image viewers and file management system.
Types of Tagging Formats
Types of Tagging Formats
EXchangeable Image File format (EXIF)
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).
Types of Tagging Formats
eXtensible Metadata Platform (XMP)
Designed by Joint Photographic Experts Group (JPEG) committee's JPEG2000 (JP2).
This format is used by Adobe Photoshop 7 and later versions (via the File Info option in Photoshop).
Identifying Metadata Needs
The following questions should be answered to determine what metadata you need to manage and use your photos:
1. What is the main objective behind the creation of the photo collection?
2. How is this collection will be hosted and managed?
3. What metadata do users need or expect?
Identifying Metadata Needs
The following questions should be answered to determine what metadata you need to manage and use your photos:
4. What metadata do you need to manage the collection?
5. What are others with similar collections doing?
6. Are there any institutional, technological or legal demands I need to consider?
Identifying Metadata Needs
The following questions should be answered to determine what metadata you need to manage and use your photos:
7. What metadata do you already have?
8. Who can contribute to the metadata?
9. How much time/money can you afford to spend on creating metadata?
Discussions &Notes for
- Mid-term exam results- Uploading and sharing photos using Flickr and Photo repository.
