About a format for storing metadata in image files information about filename and directory structures of digital cameras Design rule for Camera File system Exchangeable imagefileformat Exif is a specification for the imagefileformat used by digital camera s including smartphone s and Image scanner scanners . The specification uses the existing JPEG , TaggedImageFileFormat TIFF Rev. 6.0, and Resource Interchange FileFormat RIFF WAV file formats, with the addition of specific Metadata computing ... overlap between the tags defined in the TaggedImageFileFormat TIFF , Exif, Tag ImageFileFormat Electronic Photography TIFF EP , and Design rule for Camera File system DCF standards. For descriptive ... ImageFileFormat TIFF file structure using offset pointers in the files means that data can be spread ... Phil Harvey date 2008 01 25 accessdate 2008 01 28 ref The standard only allows TaggedImageFile ... preview image Exif audio files The Exif specification describes the Resource Interchange FileFormat ... Model Metadata Working Group Tag ImageFileFormat Electronic Photography TIFF EP References reflist ... title Exchangeable ImageFileFormat for Digital Still Cameras JEITA CP 3451 version Version ... working group Graphics file formats DEFAULTSORT Exchangeable ImageFileFormat Category Digital photography ... fileformat cs Exif da EXIF de Exchangeable ImageFileFormat es Exchangeable imagefileformat eo Exif fa fr Exchangeable imagefileformat ko id Exchangeable ImageFile it Exchangeable imagefileformat hu Exif ml nl Exchangeable imagefileformat ja Exchangeable imagefileformat pl Exchangeable ImageFileFormat pt Exif ro Exif ru EXIF sk Exchangeable imagefileformat sl Exif fi Exchangeable imagefileformat sv Exif tr De i ebilir g r nt ... TIFF file mentioned earlier , the TIFF Private Tag 0x8769 defines a sub ImageFile Directory ... support Exif data is embedded within the imagefile itself. While many recent Graphics software ... more details
Unreferenced stub auto yes date December 2009 Orphan date May 2008 Infobox fileformat name Layered ImageFileFormat extension tt .liff tt mime owner Improvision creatorcode LIFF genre Imagefile formats container for contained by extended from extended to Layered ImageFileFormat LIFF is a fileformat used in the Openlab suite for microscope image processing . It is a proprietary format, but has an open, extensible form analogous to TIFF . It was specifically designed to contain a large number of high resolution images, and also all of the meta data generated by analysis of such images. Apart from being an acronym, the name LIFF was chosen to honour Douglas Adams and John Lloyd writer John Lloyd s The Meaning of Liff , which was in turn named after Liff, Scotland Liff , a town in Scotland. Category Graphics file formats software type stub graphics software stub nn LIFF ... more details
Unreferenced stub auto yes date December 2009 Dablink This page is about the MIFF fileformat. For the film festivals, see Melbourne International Film Festival or Milano International Film Festival Not to be confused with ImageMagick The Magick ImageFileFormat , abbreviated MIFF , is an imageformat used by ImageMagick . It may be used to store bitmap images platform computing platform independently. A MIFF file consists of two sections. The header s consist of ISO 8859 1 encoded byte s, each with pairs consisting of key value . Keys include background color, depth, compression rows, units, and custom key value pairs. The latter can include things like copyright or comment. The list is terminated with a NULL character. The next section contains the binary image data. The exact format is defined by the class header. Usually it is RGBA or CMYK . External links http www.imagemagick.org script miff.php Magick ImageFileFormat specification from ImageMagick s website Category Graphics file formats Graphics file formats graphics software stub ... more details
Infobox fileformat name Camera ImageFileFormat CIFF icon logo screenshot caption extension .crw mime type code uniform type magic owner Canon company Canon released latest release version latest release date genre raw imageformat container for contained by extended from extended to standard url In digital photography , the Camera ImageFileFormat CIFF fileformat is a raw imageformat designed by Canon company Canon . Its specification was released on February 12, 1997. ref http xyrion.org ciff CIFFspecV1R04.pdf ref The last revision of the standard was revision 4, on December 24, 1997. The format is no longer used by Canon, having been superseded by the CR2 fileformat. Digital cameras The CRW format was supported by some earlier Canon digital camera s ref http lclevy.free.fr cr2 intro ref Canon EOS D30 Canon EOS D60 Canon EOS 10D Canon EOS 300D Canon Powershot Pro1 Canon Powershots G1 G6 Canon Powershots S30 S70 Software that supports CRW Besides Canon s http www.canon.co.uk For Home Product Finder Cameras Digital SLR eos30d software zoombrowser.asp ZoomBrowser and http www.canon europe.com support software dpp Digital Photo Professional , several other software programs provide read support, and sometimes write support, for CRW files including Adobe Photoshop Aperture photography software Aperture http www.racsoftware.com imageconverter.php AZImage based on libraw lite ExifTool Lightroom Adobe Lightroom Picasa dcraw http jrawio.tidalwave.it jrawio http www.libraw.org libraw Raw Therapee See also Raw imageformat Comparison of image viewers dcraw other digital negative formats References references External links http xyrion.org ciff CIFFspecV1R04.pdf CIFF specification ... canon raw.html The Canon RAW CRW FileFormat http lclevy.free.fr cr2 CR2 format http wildtramper.com sw cr2 cr2.html Canon s CR2 Raw FileFormat Specification Graphics file formats Category Graphics file formats Category Digital photography graphics software stub ... more details
Infobox fileformat name ART extension .art mime owner AOL America Online AOL creatorcode genre Imagefile formats container for extended from ART is a Proprietary software proprietary imagefileformat used mostly by the AOL America Online AOL client computing client software . The ART formatfile extension .art holds a single still image that has been highly Image compression compressed . Originally, the compression was developed by the Johnson Grace Johnson Grace Company , which was then acquired by the AOL Online service provider service . When an image is converted to the ART format, the image is analyzed and the software decides what compression technique would be best. ref http www.webreference.com dev graphics compress.html Optimizing Web Graphics Compression ref Internet Explorer used to be able to display ART images but now is no longer capable. The AOL service can automatically convert images downloading downloaded from the Internet to the compressed ART format. This conversion, which can be turned off, reduces download time for the imagefile. Image display problems with the AOL web browser are addressed at http web.archive.org web 20071026143856 http webmaster.info.aol.com faq.html graphics America Online webmaster FAQ entry . An art file opened with AOL picture viewer can be saved as another file type. ART files can be batch converted to BMP fileformat BMP , JPG , and other file formats with rare graphics programs, such as Graphic Workshop Professional http www.mindworkshop.com ... and convert ART files to BMP fileformat BMP files, through the File Save As command. http web.archive.org ... and the ART image compression. http www.webreference.com dev graphics compress.html Optimizing Web Graphics Compression A webreference.com article with technical details on the ART imageformat. http ... for image compression US patent 5892847 Method and apparatus for compressing images Graphics file formats Category Graphics file formats de ART Dateiformat software type stub ... more details
genre Imagefile formats containerfor Metadata containedby extendedfrom TaggedImageFileFormat TIFF and Exchangeable imagefileformat Exif extendedto Digital Negative Specification standard http www.iso.org ... TIFF fileformatTaggedImageFileFormat Tag ImageFileFormat Electronic Photography TIFF EP is a digital imagefileformat Open standard standard International Organization for Standardization ISO 12234 2, titled Electronic still picture imaging Removable memory Part 2 TIFF EP image data format . This is different from the TaggedImageFileFormat , which is a standard administered by Adobe ... on a subset of the Adobe Systems Adobe TaggedImageFileFormat TIFF standard, and a subset of the Japan Electronics and Information Technology Industries Association JEITA Exchangeable imagefile ... IFD and the MakerNote Tag have all been omitted. Unlike the TaggedImageFileFormat TIFF 6.0 standard ... for Standardization TaggedImageFileFormat Exchangeable imagefileformat List of ISO standards ...Infobox fileformat name Tag ImageFileFormat Electronic Photography TIFF EP icon extension .tiff, .tif ... the Exchangeable imagefileformat . However, TIFF EP provided a basis for the raw image formats of a number of cameras. One example is Nikon s NEF raw fileformat, which uses the tag TIFF EPStandardID ... EP standard does however have a few notable differences from the Exchangeable imagefileformat Exif ... from the method that is used in the Exchangeable imagefileformat Exif standard. Several tags ... imageformat . A characteristic of most digital cameras but excluding those using the Foveon X3 sensor ... color filter array CFA . Software processing a raw imageformat for such a camera needs information ... from the individual sites of the sensor. Ideally this information is held within the raw imagefile ... What is in a raw file? ref Adobe s Digital Negative fileformat DNG Digital Negative raw fileformat ... down a bit ref Several cameras use DNG as their raw fileformat, so in that limited sense they use ... more details
UDIF stands for Universal Disk ImageFormat . It is used on Mac OS X for .dmg disk image s. UDIF is a flat fileformat , and is the Native and foreign format native imageformat for Mac OS X. The format can also be opened by MagicISO and the freeware MagicDisc on Microsoft Windows Windows . External links http developer.apple.com documentation Darwin Reference ManPages man1 hdiutil.1.html tt man tt page for hdiutil http www.magiciso.com Main page for magic ISO Category Computer file formats Category Mac OS X Category Disk images Disk images mac stub it Universal Disk ImageFormat ... more details
PICtor is an graphics file formats imagefileformat developed by John Bridges , the principal author of PCPaint , the first Paintbrush program for the PC. It was also the native fileformat for Pictor Paint and GRASP multimedia authoring software also by Bridges and became the first widely accepted MS DOS DOS imaging standard. Typical fileformat The PICtor format is a device independent raster graphics raster imageformat the file header stores information about the display hardware screen resolution, color depth and palette information, bit planes and so on separately from the actual image information, allowing the image to be properly transferred and displayed on computer systems with different hardware. PIC files commonly stored palette indexed images ranging from 2 or 4 colors to 16 and 256 colors, although the format has been extended to record true color 24 bit images as well. Although it is device independent, the PIC format also contains additional information about the device ... dependent format. The encoding of a PIC file is also optimized for decoding quickly onto the native device that it was created on. PICtor image data is compressed using an advanced form of Example Pictor ... www.fileformat.info format pictor Pictor PC Paint FileFormat Summary http www.fileformat.info format grasp GRASP FileFormat Summary http netghost.narod.ru gff vendspec pictor pictor.txt PCPAINT Pictor Page Format Description . Format by John Bridges. Document by Microtex Industries, Inc. Revision Date 2 9 88 http www.martinreddy.net gfx 2d GL.txt GL &mdash Another animation format . Dr. Martin Reddy Technical Lead, R & D, Pixar Animation Studios . The Graphics File Formats Page http www.programmersheaven.com ... consecutive bytes to be included as raw data within the same parent block. As the file is processed ... Encyclopedia of Graphics File Formats, 2nd Edition author Murray, James D. , Van Ryper, William isbn ... Graphics file formats Category Graphics file formats ... more details
For the raw disk imageformat IMG fileformat Infobox fileformat name Raw imagefile extension code ... br code .bay code Casio br code Camera ImageFileFormat .crw .cr2 code Canon company Canon br code ... to create an image. Likewise, the process of converting a raw imagefile into a viewable format is sometimes ... with, the ISO standard raw imageformat ISO 12234 2, Tag ImageFileFormat Electronic Photography ... format ISO 12234 2, Tag ImageFileFormat Electronic Photography TIFF EP , often follows a common ... imagefileformat Exif format. An image thumbnail Optionally a reduced size image in JPEG format, which ... standard file header, the inclusion of additional image tags and the encryption of some of the tagged ... and is compatible with Tag ImageFileFormat Electronic Photography TIFF EP , and uses various open format s and or Open standard standards , including Exchangeable imagefileformat Exif metadata , Extensible ... raw imageformat ISO 12234 2, Tag ImageFileFormat Electronic Photography TIFF EP is not widely accepted ... 2010 The ISO standard raw imageformat is ISO 12234 2, better known as Tag ImageFileFormat Electronic ... fileformat DNG raw imageformat in September 2004. By September 2006, several camera manufacturers ... Raw ImageFormat Category Graphics file formats Category Digital photography ca RAW cs Raw grafika ... code Digital Negative fileformat .dng code Adobe Systems Adobe br code .erf code Epson br code .fff ... genre Imagefile formats containerfor containedby extendedfrom extendedto A camera raw imagefile contains minimally processed data from the image sensor of either a digital camera , image scanner ... adjustments can be made before conversion to a positive fileformat such as TIFF or JPEG for storage ... raw fileformat. In fact there are dozens if not hundreds of such formats in use by different models ... final imageformat, and it preserves most of the information of the captured image. The purpose ... fileformat DNG format. ref This industry wide situation of inconsistent formatting has concerned ... more details
BEF is an HDR High Dynamic Range imageformat developed by Unified Color. It is supported in HDR PhotoStudio , an advanced HDR imaging application, as well as via an Adobe Photoshop imageformat plug in. The BEF format can archive image data with any dynamic range, full human color range, and a quality setting directly tied to color data precision the used techniques ties it with JND just noticeable difference parameter . The BEF compression ratios are claimed to be comparable with those achieved by JPEG compression. See also cite web url http www.unifiedcolor.com download Unified Color BEF format.pdf title BEF fileformat Graphics file formats Category Graphics file formats Category High dynamic range file formats Category Photographic techniques graphics software stub ... more details
Infobox fileformat name Radiance RGBE extension tt .hdr tt mime tt image vnd.radiance tt type code genre lossless compression lossless imageformat container for contained by extended from extended to magic tt 23 3f 52 41 44 49 41 4e 43 45 0a tt standard url http radsite.lbl.gov radiance refer filefmts.pdf RGBE is an imageformat invented by Gregory Ward Larson. It stores pixels as one byte each for RGB color model RGB red, green, and blue values with a one byte shared exponent. Thus it stores four bytes per pixel. RGBE s biggest advantage is that it allows pixels to have the extended range and precision of floating point values. Often when images are generated from light simulations, the range of pixels values is much greater than will nicely fit into the standard 0..255 range of standard 24 bit image formats. As a result the bright pixels are either clipped to 255 or end up losing all their precision in dimmer pixels. By using a shared exponent, the RGBE format gains some of the advantages of floating point values without the 12 bytes per pixel needed for single precision IEEE 754 1985 IEEE floating point values, or 6 bytes in half precision and which would cover smaller range . It can handle very bright pixels without loss of precision for darker ones. A second variant of the format uses the XYZ color model with a shared exponent. The mime type and file extension is identical, thus applications reading this fileformat need to interpret the embedded information on the color model. Greg Ward provides code to handle RGBE files in his Radiance software Radiance rendering system. See also Radiance software HDR imageformat Radiance HDR imageformat High dynamic range imaging External links http radsite.lbl.gov radiance refer filefmts.pdf Radiance file formats Graphics file formats Category High dynamic range file formats Category Graphics file formats it RGBE ... more details
Infobox fileformat name Apple Icon Image icon File icns.png 128px ICNS icon. extension tt .icns tt mime type code tt icns tt uniform type com.apple.icns owner Apple Inc. genre icon computing icon graphics fileformatfileformat container for contained by extended from extended to The Apple Icon Imageformat is the icon computing icon format used in Apple Inc. s Mac OS X . It supports icons of 16 16, 32 32, 48 48, 128 128, 256 256 and 512 512 pixels, with both bit 1 and 8 bit Alpha compositing alpha channel s and multiple image states example open and closed folders . The fixed size icons can be scaled by the operating system and displayed at any intermediate size. File structure The fileformat consists of an 8 byte header, followed by any number of icons. Header class wikitable Offset Size Purpose 0 4 Magic literal, must be icns 0x69, 0x63, 0x6e, 0x73 4 4 Length of file, in bytes Icon data class wikitable Offset Size Purpose 0 4 Icon type, see OSType below. 4 4 Length of data, in bytes including type and length 8 Variable Icon data Icon Data OStype is32 il32 ih32 it32 can be compressed or uncompressed both are supported by the os. br Compressed the pixel data is compressed using the PackBits algorithm. br uncompressed 4 byte 32 bit per pixel. br br Icon Data OStype s8mk l8mk h8mk t8mk seems to be uncompressed. Icon types class wikitable sortable OSType Length bytes Size pixels class unsortable Description tt ICON tt 128 32 32 32 1 bit mono icon tt ICN tt 256 32 32 32 1 bit ... ICO icon imagefileformat External links http ezix.org project wiki MacOSXIcons Mac OS X Graphics file formats Category Graphics file formats Category Mac OS X Category Computer icons Category Graphical user interfaces mac stub it Apple Icon Image ... 128 8 bit mask tt ic08 tt varies 256 256 256 icon in JPEG 2000 format tt ic09 tt varies 512 512 512 icon in JPEG 2000 format See also Apple Developer Tools Icon Composer Icon Composer Apple Developer ... more details
Graphics were generally all that was used. Typical fileformat The BSAVED format is a device dependent raster graphics raster imageformat the file header stores information about the display hardware ... above. Fileformat The size of a HIRES Monochrome BSAVE image without the two byte header was 8000 ... aka BSAVED Image as it is referenced in a graphics program is an graphics file formats imagefile ... as raw data in the format of the native adapter s addressable memory. There is no file compression ... as a named file referred to as an Image . ref name QB BSAVE This Image of saved memory could then be reloaded ... added image height and width to the BSAVE format, and were later carried over into the C programming ... program VGACAD which saved the MCGA display to a BSAVED fileformat called BLD BLoaDablepicture , and by beginning ... source lang c a Microsoft compatible bsaved memory text imageformat descriptor unsigned char BSV header ... a smaller BSaved fileformat that does not load the unused memory after the second interleaf, nor ... graphics image source lang c a Microsoft compatible bsaved memory imageformat descriptor unsigned ... to emerge with file compression and color palettes. MCGA specification Image ERINLOGV.png thumb 320px ... an MCGA image viewer revised to use VGACad file extensions 2007 CALL ABSOLUTE Statement Programming ... I The MCGA Image and the Palette were saved outside of here Both are in BSAVED format PCOLOR PROOT ... saving measure Fileformat The 8 kB hi res frame buffer like all 8 bit Apple II video modes , due to another ... at the beginning of the imagefile, scanlines are arranged in 128 byte blocks beginning with scanlines ... Graphics Screen in HIRES 320 x 200 x 2 color cell format br Image ERINLOGKOA.png thumb 320px center ... graphics imageformat because the Commodore stored all binary files including Graphics with a two ... that the BSAVE and BLOAD commands and the BSAVE graphics imageformat came into existence on the C128 ... included .HIR and .HBM, if a file extension was used at all. The size of a HIRES Color BSAVE image ... more details
of Pixels or the Mess of Pixels? at 6mpixel.org DEFAULTSORT Image Sensor Format Category Digital photography Category Image sensors ca Format del sensor d imatge es Formato del sensor de imagen ...Image Sensor sizes overlaid inside.svg thumb 300px right Comparison of different image sensor sizes In digital photography , the image sensor format is the shape and size of the image sensor . The image sensor format of a digital camera determines the angle of view of a particular lens when used with a particular camera. In particular, image sensor s in digital SLR cameras tend to be smaller than the 24 mm x 36 mm image area of Full frame digital SLR full frame 35mm 35 mm ... reflex camera cameras may mount well on the digital bodies, but the larger image circle of the 35 mm system lens allows unwanted light into the camera body, and the smaller size of the image sensor compared to 35 mm format results in cropping of the image compared to the results produced on the film camera. This latter effect is known as field of view crop the format size ratio is known ... approx sqrt 15 approx 3.9 math Common image sensor formats Image SensorSizes.svg thumb 300px right Sizes ... Full frame digital SLR format, with sensor dimensions nearly equal to those of 135 film 35 mm film 36 24 mm Canon company Canon s APS H format for high speed pro level DSLRs crop factor ... of similarly sized formats, including Nikon DX format , Pentax , Konica Minolta Sony &alpha , Fuji crop factor 1.5 Canon company Canon entry level DSLR formats crop factor 1.6 Foveon X3 format used in Sigma Corporation Sigma SD series DSLRs crop factor 1.7 Four Thirds System format crop factor 2.0 Production ... uploadedimages FCK Image White 20Papers Canon CMOS WP.pdf title Canon s Full Frame ... to vary slightly within the same nominal format. For example, the Nikon Nikon D3 D3 and Nikon D700 ... Samsung measures 23.4 15.6 mm. Most DSLR image sensor formats approximate the 3 2 aspect ratio ... more details
Summary logo fur REQUIRED Article Tagged Use Infobox HIGHLY RECOMMENDED Source Copied from the VentureBeat website, http venturebeat.com 2009 07 10 new york sues social network tagged for deceptive marketing and privacy violations on December 10, 2010. The article containing this logo is dated July 10, 2009 ADDITIONAL INFORMATION Used for the website www.tagged.com Owner Tagged Inc. Website History Commentary OVERRIDE FIELDS Description Portion Low resolution Purpose Replaceability other information Licensing Non free logo ... more details
logo FileTagged logo.jpg url http www.tagged.com tagged.com location city San Francisco, California ... site registration Required owner Tagged Inc. author Greg Tseng , Johann Schleier Smith launch date ... , Malay language Bahasa Melayu revenue alexa 227 as of December 2010 ref name alexa Tagged is a social ... 1, 2010 accessdate 2010 06 14 ref and share tags and virtual gifts. Tagged has 100 million registered ... a social network dark horse tagged has 100m 23709.html work The New York Times first Anthony last Ha title A Social Network Dark Horse? Tagged Has 100M Registered Users date January 28, 2011 ref Quantcast reports Tagged has 6.2 million monthly unique U.S. visits and 21.1 million globally. ref name quantcast br In 2009, Tagged was criticized for sending deceptive bulk mail ref name Symantec ref name ...&art searched tagged 20lawsuit&page number 0 ref The company has since adopted ... Attorney General Office of New York State Attorney General Cuomo has also criticized Tagged for its ... archiveurl http www.webcitation.org 5xbdHrSTU archivedate March 31, 2011 ref Tagged is an Inc. 500 ... inc5000 profile tagged ref Company history Tagged Inc. was co founded in mid 2004 by entrepreneurs ... networking sites Tagged, Facebook , LinkedIn , Bebo , and hi5 website hi5 regarding email contacts ... Embracing Data Portability? Partnerships With Facebook, Bebo, Hi5, LinkedIn and Tagged publisher ... release razz inc partners major social networking site tagged title Press Release Razz, Inc. Partners With Major Social Networking Site, Tagged publisher FierceWireless date July 26, 2007 accessdate ... 23 daily41.html?jst s cn hl title Jangl launches service with Tagged publisher San Francisco Business ... 2009, following complaints from the public Tagged was internet censorship blocked in Qatar by the only ... , Tagged announced that it was donating 50,000 to the Wyclef Jean Y le Haiti Y le Haiti Earthquake Fund , partly stemming from user donations. ref cite news title Tagged Donates 50,000 to Yele Haiti Earthquake ... more details
format alone, but also real metadata about the file and its contents. For example most imagefile formats store information about image size, resolution, colour space format and optionally other ... image s, OLE documents and TIFF images. See also Audio fileformat Chemical fileformat Container ...morefootnotes date October 2008 A fileformat is a particular way that information is encoded for storage ... with each other. File formats are divided into Proprietary format proprietary and open format s. Generality ... PNG files, for example, store Raster graphics bitmapped Graphics fileformat images using lossless data ... or not a particular computer program program treats a particular fileformat correctly. There are, however, two reasons why this is not always the case. First, some fileformat developers view their specification ..., some fileformat developers never spend time writing a separate specification document rather, the format ... file formats without a publicly available specification can be costly. Learning how the format works ... to protect a fileformat. Although patents for file formats are not directly permitted under US law ... with the GIF fileformat requires the use of a patented algorithm, and although initially the patent ... accessdate 2007 01 07 ref Identifying the type of a file A method is required to determine the format ... Windows , Mac OS X , CP M , DOS , VMS , and VM CMS , is to determine the format of a file based on the section ... a file as a different format simply by renaming it&mdash an HTML file can, for instance ... and users may depend on them when looking for a file s format. By having file extensions hidden .... Internal metadata A second way to identify a fileformat is to store information regarding the format inside the file itself. Usually, such information is written in one or more binary string s , tagged or raw texts placed in fixed, specific locations within the file. Since the easiest place ... be present in other areas too, often including the end of the file that depends on the fileformat ... more details
to this tree center Imagetagged union tree.svg The tree produced by the above constructors ...unreferenced date August 2009 In computer science , a tagged union , also called a variant type variant ... ordinary Union computer science unions , tagged unions can save storage by overlapping storage areas for each type, since only one is in use at a time. Tagged unions are most important in functional ... datatypes see algebraic data type and the compiler is able to verify that all cases of a tagged ... in use. Tagged unions are often accompanied by the concept of a constructor , which is similar ... a tagged union value, given the initial tag value and a value of the corresponding type. Mathematically, tagged unions correspond to disjoint union disjoint or discriminated unions , usually written ... , one from A and one from B . In type theory , a tagged union is called a sum type . Notations vary ... under the Curry Howard correspondence. An enumerated type can be seen as a degenerate case a tagged ... The primary advantage of a tagged union over an untagged union is that all accesses are safe ... to find bugs if that logic fails. The primary advantage of a tagged union over a simple record ... dynamically adjust the size of a tagged union value as needed. When the value is Immutable object immutable , it is simple to allocate just as much storage as is needed. The main disadvantage of tagged ... may return 1 to indicate failure, and sentinel value s, most often used in tagged pointer s. Sometimes ... in C . Tagged unions are not intended for this purpose typically a new value is assigned whenever ... data types are comparable to tagged unions in their formal definition, typical tagged unions include ... possible case of a tagged union will be dealt with when it is used. The values of a universal ... handling , tagged unions are sometimes used to handle the occurrence of exceptional results ... checked this is a fairly common source of programming errors. This use of tagged unions can ... more details
In computer science , a tagged architecture ref http www.memorymanagement.org glossary t.html tagged.architecture The Memory Management Glossary Tagged architecture ref is a particular type of computer architecture where every word computing word of memory constitutes a tagged union , being divided into a number of bits of data, and a tag section that describes the type of the data how it is to be interpreted, and, if it is a reference, the type of the object that it points to. Two notable series of tagged architectures were the Lisp machine s, which had tagged pointer support at the hardware and opcode level, and the Burroughs large systems which had a data driven tagged and descriptor based architecture. References references comp sci stub Category Computer architecture pt Arquitectura etiquetada ... more details
In computer science , a tagged pointer is a common example of a tagged union , where the primary type of data to be stored in the union is a Pointer computing pointer . Often, the tag in a tagged pointer will be folded into the data representing the pointer, taking advantage of one of the following properties of pointers Pointers to certain types of data will often be Data Structure Alignment aligned to the size of the data 4 bytes, 8 bytes, etc. , which leaves a few bits of the pointer unused. As long as code that uses the pointer properly Bit mask masks out these bits, the pointer can be tagged with extra information. The virtual memory system in most modern operating system s reserves a block of logical memory around address 0 as unusable. This means that, for example, a pointer to 0 is never a valid pointer and can be used as a special null pointer value. Use of 0 to represent a null pointer is extremely common, with many programming languages such as Ada programming language Ada explicitly ... pointers to be tagged with information about the type of data pointed to, conditions under ... number of tagged values distinct from valid pointers. In a tagged architecture , a number of bits in every word of memory are reserved to act as a tag. Tagged architectures, such as the Lisp machine s, often have hardware support for interpreting and processing tagged pointers. GNU C Library GNU ... to a dirty code table entry code at address code 0xf470 code Advantages The major advantage of tagged ... Tagged pointers have some of the same difficulties as xor linked list s, although to a lesser extent. For example, not all debugger s will be able to properly follow tagged pointers however, this is not an issue for a debugger that is designed with tagged pointers in mind. The use of 0 to represent ... treat 0 as a special null value. It has thoroughly proven its robustness. Usually when tagged pointers are spoken of, this common use is excluded. References Reflist 2 DEFAULTSORT Tagged Pointer ... more details
Orphan date February 2009 Tagged queuing is a method for allowing a Computer hardware hardware device or Controller computing controller to process commands received from a device driver out of order. It requires that the device driver attaches a tag to each command which the controller or device can later use to identify the response to the command. Tagged queueing can speed up processing considerably if a controller serves devices of very different speeds, such as an SCSI controller serving a mix of CD ROM drives and high speed Disk storage disks . In such cases if a request to fetch data from the CD ROM is shortly followed by a request to read from the disk, the controller doesn t have to wait for the CD ROM to fetch the data, it can instead instruct the disk to fetch the data and return the value to the device driver, while the CD ROM is probably still seeking. FOLDOC Category Computer peripherals ... more details
Extended RMID FileFormat RMI Windows RIFF MIDIfile CorelDRAW CDR CorelDRAW vector graphics file ANI fileformat ANI Animated Windows cursors DLS format DLS Downloadable Sounds WebP A lossy image ...The Resource Interchange FileFormat RIFF is a generic file container format digital container format ... files. It is based on Electronic Arts Interchange FileFormat , introduced in 1985 on the Amiga ... like Audio Video Interleave AVI , ANI animation fileformat ANI and WAV , which use RIFF as their basis ... fileformat chunk s . The overall format is identical to Interchange FileFormat IFF , except for the endianness ... file will spell out R , I , F , F . More information about the RIFF format can be found in the Interchange FileFormat article. RF64 is a multichannel fileformat based on RIFF specification, developed by the European Broadcasting Union . It is Broadcast Wave Format BWF compatible and allows file sizes ... of the fileformat is unrecognised. The standard also allows the use of user defined fields. Programmers ... Windows 3.1 multimedia files, Microsoft introduced a new variant on the existing MIDI fileformat used ... fileformat consisted of a standard MIDI file enclosed in a RIFF wrapper , and had the file extension Musical Instrument Digital Interface RIFF RMID .RMI . Since the existing MIDI fileformat already .... The MIDI Manufacturers Association have since embraced the RIFF based MIDI fileformat, and used ... Format IFF AIFF FourCC Broadcast Wave Format BWF Broadcast Wave Format Some common RIFF file types ...?url library en us multimed htm win32 resource interchange fileformat services.asp Resource Interchange FileFormat Services http msdn2.microsoft.com en us library ms779636 VS.85 .aspx RIFF AVI file ... library default.asp?url library en us DMusicC htm directmusicfileformat.asp DirectMusic fileformat ... formats Category Computer file formats cs Resource Interchange FileFormat de Resource Interchange FileFormat es Resource Interchange FileFormat fr Resource Interchange FileFormat ko RIFF ja ... more details
The JPEG File Interchange Format JFIF is an imagefileformat standard. It is a format for exchanging JPEG encoded files compliant with the JPEG JPEG Interchange Format JIF standard. It solves some of JIF s limitations in regard to simple JPEG encoded file interchange. As with all JIF compliant files, image data in JFIF files is compressed using the techniques in the JPEG standard, hence JFIF is sometimes ... set. In particular, images can be tagged with an absolute color space, sRGB . Fileformat structure .... Since 2009, JFIF is under development to be defined as ISO IEC 10918 5 JPEG Part 5 JPEG File Interchange Format JFIF . ref name jfif cite web url http www.jpeg.org newsrel25.html title Press Release 48th WG1 meeting, Maui, USA JPEG XR enters FDIS status, JPEG File Interchange Format JFIF to be standardized ... for Exif must be the first in the imagefile. In practice, many programs and digital cameras produce ... format An optional second application segment allows a thumbnail image to be embedded using several ... Format Specification v1.02 , September 1, 1992. Category Graphics file formats de JPEG File Interchange Format fr JPEG File Interchange Format ... array having the same exterior boundaries as the image. This is convenient for computer users ... standard does not include any method of coding the resolution or aspect ratio of an image. JFIF ... segment in the file, hence making it simple to recognise a JFIF file. Exif images recorded by digital ... ICC profile, colorspace metadata, or an sRGB tag is provided and interpreted a decoded JFIF image ... 5, Information technology Digital compression and coding of continuous tone still images JPEG File Interchange Format JFIF author ISO accessdate 2009 11 09 ref MIME Type In 1996, Request for Comments RFC 2046 specified that the imageformat used for transmitting JPEG images across the internet should be JFIF. The MIME type of image jpeg must be encoded as JFIF. In practice, however, virtually all ... more details
Context date October 2009 The CALS Raster fileformat is a standard for the interchange of graphics data. It was developed as part of the CALS DOD CALS DOD initiative . It defines a standard for encoding and compression of raster bit mapped image data. References MIL R 28002 Requirement for Raster Graphics Representation in Binary Format MIL PRF 28002 Externals Links http www.fileformat.info format cals CALS Raster FileFormat Summary Graphics file formats Category Graphics file formats Category Technical communication ... more details
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