|
TIFF is a computer file format for storing raster graphics images, popular among graphic artists, the publishing industry, and photographers. The TIFF format is widely supported by image-manipulation applications, by publishing and page layout applications, and by scanning, faxing, word processing, optical character recognition and other applications.〔TIFF was chosen as the native format for raster graphics in the NeXTstep operating system; this TIFF support carried over into Mac OS X.〕 The format was created by Aldus Corporation for use in desktop publishing. It published the latest version 6.0 in 1992, subsequently updated with an Adobe Systems copyright after the latter acquired Aldus in 1994. Several Aldus/Adobe technical notes have been published with minor extensions to the format, and several specifications have been based on TIFF 6.0, including TIFF/EP (ISO 12234-2), TIFF/IT (ISO 12639),〔(【引用サイトリンク】publisher=ISO )〕〔(【引用サイトリンク】publisher=The National Digital Information Infrastructure and Preservation Program at the Library of Congress )〕〔(【引用サイトリンク】title=The TIFF/IT file format )〕 TIFF-F (RFC 2306) and TIFF-FX (RFC 3949). ==History== TIFF was created as an attempt to get desktop scanner vendors of the mid-1980s to agree on a common scanned image file format, in place of a multitude of proprietary formats. In the beginning, TIFF was only a binary image format (only two possible values for each pixel), because that was all that desktop scanners could handle. As scanners became more powerful, and as desktop computer disk space became more plentiful, TIFF grew to accommodate grayscale images, then color images. Today, TIFF, along with JPEG and PNG, is a popular format for high color-depth images. The first version of the TIFF specification was published by Aldus Corporation in the autumn of 1986 after two major earlier draft releases. It can be labeled as Revision 3.0. It was published after a series of meetings with various scanner manufacturers and software developers. In April 1987 Revision 4.0 was released and it contained mostly minor enhancements. In October 1988 Revision 5.0 was released and it added support for palette color images and LZW compression.〔(TIFF Revision 6.0 Final — June 3, 1992 ), Retrieved on 2009-07-10〕 The specification originally used the names ''Tagged Image File Format'' and ''Tag Image File Format'' (Revision 4.0) as well as their acronym TIFF, but later dropped all references to the full name (Revision 5.0, 6.0). More recent ISO publications again refer to the full name ''Tag Image File Format'' (see references elsewhere in this article). Still, the version ''Tagged Image File Format'' seems to be several times more prevalent in non-official usage, even by Adobe. 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「Tagged Image File Format」の詳細全文を読む スポンサード リンク
|