12.m3 cms content-updating-pt1
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  • 1. IT2032PAContent Management System (CMS) Nitec in Social Media & Web Technology
  • 2. CMS Content UpdatingIn this chapter, you will learn: o Identify the correct files formats used in CMS o Define what is “digital graphics” o Identify the characteristics and file extensions of various graphic formats o Describe the advantages and disadvantages of the various formats across platforms.
  • 3. Digital ImagesStill images are generated by the computer intwo ways: as bitmaps (or paint graphics) andas vector (or just plan “drawn”) graphics
  • 4. Digital ImagesBitmaps o are used for photo-realistic images and complex drawings requiring fine detail. o image files are compressed to save memory and disk space• Vector o are used for lines, boxes, circles, polygons, and other graphic shapes o can be filled with colour and patterns
  • 5. Colour ModelsRGB - Red, Green and Blue o are the colors that monitors and televisions use to show colors
  • 6. Colour ModelsCMYK - Cyan, Magenta, Yellow and Black o are the colors used to produce full-color photographs and designs
  • 7. Colour ModelsIndexed Colour Mode o is a product of the Internet revolution o can contain up to 256 colors and has 8-bit depth
  • 8. Colour ModelsGrayscale Colour Mode o a color mode made up of 256 shades of gray
  • 9. Digital Graphics EditingPixels o the smallest unit on a display screen or monitorResolution o Resolution refers to how an image is "resolved." o The smoother or more clear that an image appears; the more resolved it is to our eyes. o The higher an images resolution, the better it will appear
  • 10. Digital Graphics EditingScreen Resolution Factors that affect image when viewed on screen o The quality of the monitor being used o actual images quality o Common resolution for on-screen images is 72dpi
  • 11. Digital Image FormatsJoint Photographic Experts Group (JPEG) o JPEGs are bitmap images o can be edited/created by image-editing software o used primarily for photographic images o can save in either RGB or CMYK color mode at whatever resolution is needed o uses lossy compression
  • 12. Digital Image FormatsGraphic Interchange File (GIF) o bitmapped graphic files o compresses drawings and cartoons that have only a few colours in them o supports transparency o allows for animation (Animated GIF) o can display between two and 256 colors o of little use in the world of professional printing o GIF image is always in index mode
  • 13. Digital Image FormatsEncapsulated PostScript (EPS) o contain any combination of text, graphics and images (both bitmaps and vector-drawn objects) o the most versatile file format that is available o can be generated by all drawing applications as well as most layout applications o widely compatible with a variety of desktop publishing applications o Images can be selected with mask channels o ile format can store information about the halftone screen type
  • 14. Digital Image FormatsPortable Network Graphics (PNG) o a bitmapped image format that employs lossless data compression o supports palette-based images o PNG was designed for transferring images on the Internet
  • 15. Digital Image FormatsPDF – Portable Document Format o stands for Portable Document Format o can contain text, images and tables such as those produced by spreadsheets o PDF supports security. o PDF files are not meant to be edited o A cross application and platform description and publishing format. o PDF is a proprietary file format. - disadvantage