Task 1

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Task 1

  1. 1. Jordan SmithTechnical GlossaryPixelsDefinition: The term "pixel" is actually short for "Picture Element." These small little dots are whatmake up the images on computer displays, whether they are flat-screen (LCD) or tube (CRT)monitors. The screen is divided up into a matrix of thousands or even millions of pixels. Typically,you cannot see the individual pixels, because they are so small. This is a good thing, because mostpeople prefer to look at smooth, clear images rather than blocky, "pixelated" ones. However, if youset your monitor to a low resolution, such as 640x480 and look closely at your screen, you may beable to see the individual pixels. As you may have guessed, a resolution of 640x480 is comprised of amatrix of 640 by 480 pixels, or 307,200 in all. Thats a lot of littledots.http://www.techterms.com/definition/pixelResolutionDefinition: Refers to the sharpness and clarity of an image, the term is most often used to describemonitors, printers, and bit-mapped graphic images. In the case of dot-matrix and laser printers, theresolution indicates the number of dots per inch. For example, a 300-dpi (dots per inch) printer isone that is capable of printing 300 distinct dots in a line 1 inch long. This means it can print 90,000dots per square inch. http://www.webopedia.com/TERM/R/resolution.htmlVectorDefinition: Unlike JPEGs, GIFs, and BMP images, vector graphics are not made up of a grid of pixels.Instead, vector graphics are comprised of paths, which are defined by a start and end point, alongwith other points, curves, and angles along the way. A path can be a line, a square, a triangle, or acurvy shape. These paths can be used to create simple drawings or complex diagrams. Paths areeven used to define the characters of specifictypefaces.http://www.techterms.com/definition/vectorgraphicRaster ImagesMost images you see on your computer screen are raster graphics. Pictures found on the Web andphotos you import from your digital camera are raster graphics. They are made up of grid of pixels,commonly referred to as a bitmap. The larger the image, the more disk space the image file will take
  2. 2. up. For example, a 640 x 480 image requires information to be stored for 307,200 pixels, while a3072 x 2048 image (from a 6.3 Megapixel digital camera) needs to store information for a whopping6,291,456 pixels.http://www.techterms.com/definition/rastergraphicBMP- Short for "Bitmap”. It can be pronounced as "bump," "B-M-P," or simply a "bitmap image." TheBMP format is a commonly used raster graphic format for saving image files. It was introduced onthe Windows platform, but is now recognized by many programs on both Macs andPCs.http://www.techterms.com/definition/bmpPNG-PNG, which can be pronounced "ping" or "P-N-G," is a compressed raster graphic format. It iscommonly used on the Web and is also a popular choice for application graphics.http://www.techterms.com/definition/pngGIF-The letters "GIF" actually stand for "Graphics Interchange Format," but you dont need toremember that. What you should know is that a GIF is a compressed image file format. GIF imagesuse a compression formula originally developed by CompuServe (which is why you see the term"CompuServe GIF" in Photoshop, for those of you that care). GIFs are based on indexed colours,which is a palette of at most 256 colours. This helps greatly reduce their file size. These compressedimage files can be quickly transmitted over a network or the Internet, which is why you often seethem on Web pages. GIF files are great for small icons and animated images, but they lack the colourrange to be used for high-quality photos. http://www.techterms.com/definition/gifTiff-Stands for "Tagged Image File Format." It is graphics file format created in the 1980s to be thestandard image format across multiple computer platforms. The TIFF format can handle color depthsranging from 1-bit to 24-bit. Since the original TIFF standard was introduced, people have beenmaking many small improvements to the format, so there are now around 50 variations of the TIFFformat. So much for a universal format. Recently, JPEG has become the most popular universalformat, because of its small file size and Internetcompatibility.http://www.techterms.com/definition/tiff
  3. 3. JPEG-The term actually stands for "Joint Photographic Experts Group," because that is the name of thecommittee that developed the format. But you dont have to remember that because evencomputer nerds will think youre weird if you mention what JPEG stands for. Instead, remember thata JPEG is a compressed image file format. JPEG images are not limited to a certain amount of colour,like GIF images are. Therefore, the JPEG format is best for compressing photographic images. So ifyou see a large, colourful image on the Web, it is most likely a JPEGfile.http://www.techterms.com/definition/jpegPSD-Image file created by Adobe Photoshop, a professional image-editing program; may includeimage layers, adjustment layers, layer masks, annotation notes, file information, keywords, andother Photoshop-specific elements.http://www.fileinfo.com/extension/psdPDF-Cross-platform document created by Adobe Acrobat or a program with the Acrobat plug-in;commonly used for e-mail attachments or for saving publications in a standard format for viewing onmultiple computers; usually created from another document instead of from scratch; can be editedwith Adobe Acrobat, a commercial program.http://www.fileinfo.com/extension/pdfEPS-PostScript (.PS) file that may contain 2D vector graphics, bitmap images, and text; may alsoinclude an embedded preview image in bitmap format; can be placed within another PostScriptdocument. EPS files are supported by several different drawing programs and vector graphic editingapplications. They are often used as a standard means for transferring image data between differentoperating systems.http://www.fileinfo.com/extension/epsAI-Drawing created with Adobe Illustrator, a vector graphics editing program; composed of pathsconnected by points, rather than bitmap image data; commonly used for logos and printmedia.http://www.fileinfo.com/extension/aiCompression-Data compression is particularly useful in communications because it enables devicesto transmit or store the same amount of data in fewer bits. There are a variety of data compressiontechniques, but only a few have been standardized. The CCITT has defined a standard datacompression technique for transmitting faxes (Group 3 standard) and a compression standard fordata communications through modems (CCITT V.42bis). In addition, there are file compressionformats, such as ARC and ZIP. http://www.webopedia.com/TERM/D/data_compression.htmlImage Optimisation-For imagery, optimisation involves choosing a suitable graphic compressionformat. Compression reduces the image filesize and consequently the time it takes to download anddisplay in a browser. Common compression types include GIF, JPEG and PNG. Many compressionformats reduce filesize by removing information from the image (downsampling). For example, the
  4. 4. JPEG format reduces overall tonal range to reduce filesize—reducing the tonal range means thathighlights and shadows become less pronounced.http://www.motive.co.nz/glossary/optimise.phpStorage and Asset Management-Digital asset management systems (DAMS) include computersoftware and hardware systems that aid in the process of digital asset management. The term"digital asset management" (DAM) also refers to the protocol for downloading, renaming, backingup, rating, grouping, archiving, optimizing, maintaining, thinning, and exporting files.http://en.wikipedia.org/wiki/Digital_asset_management

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