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Google Images is a search service owned by Google and introduced in July 2001, that allows users to search the Web for image content.〔Zipern, Andrew. "(A Quick Way to Search For Images on the Web )." ''New York Times.'' 12 July 2001. Retrieved 13 September 2009.〕 The keywords for the image search are based on the filename of the image, the link text pointing to the image, and text adjacent to the image. When searching for an image, a thumbnail of each matching image is displayed. When the user clicks on a thumbnail, the image is displayed in a box over the website that it came from. The user can then close the box and browse the website, or view the full-sized image. ==Expansion and user interface (2001-2011)== The Google President, Eric Schmidt, stated that Google Images search was created because of the desire to view Jennifer Lopez in her exotic green Versace dress. In 2000, Google Search results were limited to simple pages of text with links, but the developers worked on developing this further, realising that an image search was required to answer "the most popular search query" they had seen to date: Jennifer Lopez's green dress.〔 As a result of this, Google Image Search was born.〔 In 2001, 250 million images were indexed. In 2005, this grew to 1 billion. By 2010, the index reached 10 billion images. As of July 2010, the service receives over one billion views a day. Google introduced a sort by subject feature for a visual category scheme overview of a search query in May 2011. In early 2007 Google implemented an updated user interface for the image search, where information about the image, such as resolution and URL, was hidden until the user moved the mouse over the thumbnail.〔(Updated Google Images UI )〕 This was discontinued after a few weeks. On October 27, 2009, Google Images added a feature to its image search that can be used to find similar images.〔(Similar Images graduates from Google Labs )〕〔(A new feature in Google image search for searching similar images )〕 On July 20, 2010, Google updated the user interface again, hiding image details until mouse over, like before.〔(Google Image Search Gets an Overhaul )〕 This feature can be disabled by pressing "Ctrl + End" on one's keyboard and clicking "Switch to basic version". In June 2011, Google Images began to allow for reverse image searches directly in the image search-bar (that is, without a third-party add on, such as the one previously available for Mozilla Firefox). This feature allows users to search by dragging and dropping an image into the search-bar, uploading an image, selecting a URL, or 'right-clicking' on an image.〔(【引用サイトリンク】title=Search by Image · Inside Google Search )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Google Images」の詳細全文を読む スポンサード リンク
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