The summer is usually a good time to take pictures in the home. With or without a vacation, take advantage of any trip, meeting, festival .... to make some shots. Some of them will go to a network, and the vast majority to a folder identified in the best, with the date and name of the event.
From the digital revolution photo of 90 of the last century there has been a before and after, with the photograph. The digital age changed analog picture, and a photo in seconds is published by mass media, blog or photoblog, permitting access and consultation to millions of people. Many individuals, including professional photographers have increased their production, and now it's easy to return this summer with over 400 photographs in one or more external storage cards.
This huge number of testimonials received individual is metadata that display much more information than that offered by the image itself. Metadata is embedded in the photograph as if it were a fingerprint from the moment that is taxed in the digital format.
MetadataBut seeking help in the management and further processing of the photographs are immersed in a constant process of change, offering new structures and models that may hinder their recovery. What good is " mark" with a photo metadata if the reader is not available or appropriate decoder to your question?
Non-depth look at some metadata and tagging options offered by the photographs taken with digital cameras.
Some of the data provided are the metadata that the camera embedded in the image at the instant the picture is stored, called this set of metadata such as Exif .
With Exif metadata we can obtain physical characteristics of photography, technical data collection, information about the device, coordinates of the point of capture, MakerNote .... data vary with the photographic equipment we use.
Exif Data , Ubuntu image properties.
addition to these metadata to the default, you can add other parameters to set Exif, if we use a photo editing software. You can take a Title , add Author , establishing rights, and you can also add as many tags as we see fit based on free text and controlled languages. And so, if we add Exif data provided by the camera and that we have added valuable information describing the image.
Exif data added, Windows image properties.
The set Exif is metadata that can be used in very different ways, especially knowing that the image process has continued, and even the author's style in terms of focus, lighting .... Also the author can provide an explanation in this metadata if a photograph has been retouched.
In the mass media and news agencies to manage your photos using three kinds of metadata the IPTC, XMP , and for some years IPTC Core. The set of metadata
IPTC , created in the 90 by the association of media with the same name International Press Telecommunications Council IPTC , was born to manage and share the growing number of digital photos between various communications centers members of this body. IPTC assign a different set of descriptive metadata different Exif to manage photos.
IPTC metadata model using DigiKam
Other group metadata is XMP ( Extensible Metadata Platform ) . XMP is a standard used by Adobe products since 2001, it defines a metadata model that can be used in PDF documents, photos (JPEG, TIFF, RAW, RAW XMP metadata stored in sidecar file -....), and edit PSD files, among others.
XMP was popularized by the widespread use of one of the flagship software of Adobe : the Photoshop. But this does not mean XMP can only be edited and viewed using Adobe software, others have used many programs, becoming a very popular set of metadata in graphical editing environments.
XMP metadata model using DigiKam
Following the success of XMP the International Press Telecommunications Council launched in 2005, the "IPTC Core " surrendered to the metadata standard technical framework Adobe XMP .
Adobe Photoshop CS4 still using XMP for your photographs, using elements of the metadata sets IPTC, Exif , and other less common.
Source some XMP metadata extracted by Adobe Photoshop, previously assigned DigiKam
text fragment extracted from the picture, open a text file.
After seeing some metadata models the question is: What happens to these descriptive metadata and markup languages \u200b\u200bthat are not widespread in our information centers? How can you live with Dublin Core, EAD , Marc-21, RDF .... that more and more likely to accompany the items as an embedded metadata? "Back to the production-management dichotomy differentiating between metadata creators and managers?
And these issues do not only occur in the photographs, the XMP also used for the description of PDF documents. Some records managers as Alfresco, EMC Documentum or , seeing the many possibilities offered by this set of metadata can retrieve XMP structure of documents (and pictures!). Just as some programs of digital repositories, nor obviate this reality.
Also on the photo description and use of metadata, it is interesting to know some of the different and numerous standardized forms which could describe a picture (also collecting metadata systems) reflected in the article The Archival Photograph and Its Meaning: Formalisms for Modeling Images Allen C. BENSON , the article analyzes the problems, or say possibilities, it touches face.
And finally, by way of conclusion, in any case information center digital photographic materials should be available from different publishers of metadata (Exif, XMP, ITCP ....), ITPC core to obtain more information photographs can run, and avoid losing important data descriptive.
Trying to find a single solution to apply models and metadata descriptive standards in the picture can be a long way. And it is clear that currently there are numerous models of description of pictures in response to metadata standards, and regulations whose objectives are the same: to describe and identify to recover.
know which will be the most appropriate will depend on our assessment, taking into account the objectives, environment, needs and possibilities of the workplace.
Some links:
- About metadata, Adobe.
- IPTC Core Structure in English, IPTC
Supporting Software - IPTC photo metadata standards IIM and "IPTC Core", IPTC
- EXIF, IPTC, XMP Software - Metadata Readers, Editors, Extraction Tools, About.com
- Web C. Allen Benson
- What do you know?
- Most popular software XMP, XMP software
- ufraw
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