Editing Image sharing (section)

== Technologies ==

===Web photo album generators===
{{see also|Comparison of photo gallery software}}
Software can be found on the Internet to generate digital photo albums, usually to share photos on the web, using a home web server. In general, this is for advanced users that want to have better control over the appearance of their web albums and the actual servers they are going to run on.

===Image classification===
Image sharing sites usually propose several ways to classify images.<ref>Brown, F. (2007). "[http://www.allegrotechindexing.com/metadata.pdf Metadata Goes Mainstream] {{Webarchive|url=https://web.archive.org/web/20070616124934/http://www.allegrotechindexing.com/metadata.pdf |date=2007-06-16 }}—about online photo galleries and the lessons we can learn."</ref> Most sites propose at least a [[Taxonomy (general)|taxonomy]] where images can be grouped within a directory-like structure in so-called "galleries". Some sites also allow users to classify images using tags to build a [[folksonomy]]. Depending on the restrictions on the set of users allowed to tag a single document and the set of tags available to describe the document, one speaks about narrow and broad folksonomies.<ref>Vanderwal, T. (2005). "[http://www.vanderwal.net/random/entrysel.php?blog=1635 Explaining and Showing Broad and Narrow Folksonomies] {{Webarchive|url=https://web.archive.org/web/20210610144214/https://www.vanderwal.net/random/entrysel.php?blog=1635 |date=2021-06-10 }}."</ref> A folksonomy is broad when there is no restriction on the set of taggers and available tags. When there are limitations, the folksonomy is called narrow. Another mechanism is coupling taxonomy and folksonomy, where tags associated to galleries and artists are cascaded to the galleries and artist's pictures. Broad taxonomies have interesting properties like the [[power law]].<ref>Speroni, Pietro. (2005-05-25). "[http://blog.pietrosperoni.it/2005/05/25/tag-clouds-metric/ On Tag Clouds, Metric, Tag Sets and Power Laws] {{Webarchive|url=https://web.archive.org/web/20061011212324/http://blog.pietrosperoni.it/2005/05/25/tag-clouds-metric/ |date=2006-10-11 }}." Retrieved 2016-10-23.</ref>

===Photo tagging===
{{See also|Social bookmarking}}
Photo tagging is the process that allows users to tag and group photos of an individual or individuals.<ref>{{Cite news|url=http://www.makeuseof.com/tag/3-things-you-need-to-know-about-photo-tagging-in-facebook/|title=3 Things You Need To Know About Photo Tagging In Facebook|last=Sieber|first=Tina|date=2012-06-13|newspaper=MakeUseOf|access-date=2016-10-22}}</ref> With facial recognition software tagging photos can become quicker and easier; the more tagging done of an individual the more accurate the software can be. This type of software is currently in use on Facebook.<ref name=":0">{{Cite web|url=https://www.facebook.com/help/122175507864081|title=How does Facebook suggest tags? {{!}} Facebook Help Center {{!}} Facebook|website=www.facebook.com|access-date=2016-10-22}}</ref> Photo tagging is a way of labeling photos so that viewers can know who is who in the picture. On most online photo sharing sites such as [[Facebook]], a tag can also be used as a link that when clicked will take you to the person's profile that was tagged. Most of the time photos can only be tagged by the user to uploads the photo but on some sites photos can be tagged by other users as well. These tags can be searched for across the entire Internet, on separate websites or in private data bases. They can be used for [[crowdsourced]] classification (see the section on [[#Image classification|image classification]]) but can also play a socio-cultural role in that they can establish [[neologism]]s, [[Internet meme]]s, [[snowclone]]s, [[slogan]]s, [[catch phrase]]s, shared vocabularies and categorizations as well as producing comedic twists, [[Contextualization (sociolinguistics)|context]]s and [[Point of view (philosophy)|perspectives]] of the presented images, and hence often play a significant role in the [[community building]] and [[identity formation]] of and the [[entertainment]] in [[online communities]] that allow the creation of broad folksonomies.

===Geotagging===
{{Main article|Geotagging}}
Geotagging a photo is the process in which a photo is marked with the geographical identification of the place it was taken. Most technology with photo taking capabilities are equipped with GPS system sensors that routinely geotag photos and videos. Crowdsourced data available from photo-sharing services have the potentiality of tracking places. Geotagging can reveal the footprints and behaviors of travelers by utilizing spatial proximity of geo-tagged photos that are shared online, making it possible to extract travel information relating to a particular location.<ref>Kou, N. M., U, L. H., Yang, Y., & Gong, Z. (October 01, 2015). Travel topic analysis: a mutually reinforcing method for geo-tagged photos. Geoinformatica : an International Journal on Advances of Computer Science for Geographic Information Systems, 19, 4, 693–721</ref><ref>Xu, Z., Chen, L., & Chen, G. (May 01, 2015). Topic based context-aware travel recommendation method exploiting geotagged photos. Neurocomputing, 155, 99–107.</ref> Instagram, Flickr, and Panoramio are a few services that provide the option of geotagging images. Flickr has over 40 million geotagged photos uploaded by 400 thousand users, and still growing at a rapid pace.<ref>García-Palomares, J. C., Gutiérrez, J., & Mínguez, C. (January 01, 2015). Identification of tourist hot spots based on social networks: A comparative analysis of European metropolises using photo-sharing services and GIS. Applied Geography, 63, 408–417.</ref> Some sites including [[Panoramio]] and [[Wikimedia Commons]] show their [[geocoded photograph]]s on a map, helping the user find pictures of the same or nearby objects from different directions.