Technical file powerpoint


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Technical file powerpoint

  1. 1. Technical File Powerpoint
  2. 2. Raster and Vector Images• There are two kinds of computer graphics - raster (composed of pixels) and vector (composed of paths). Raster images are more commonly called bitmap images. A bitmap image uses a grid of individual pixels where each pixel can be a different colour or shade. Bitmaps are composed of pixels. Vector graphics use mathematical relationships between points and the paths connecting them to describe an image. Vector graphics are composed of paths. The image to the left below is representative of a bitmap and the image to the right is representative of a vector graphic. They are shown at four times actual size to exaggerate the fact that the edges of a bitmap become jagged as it is scaled up:• I created this document with information used from the following website:• Vector Image Raster Image• I found these images at and
  3. 3. Antialiasing• In computer graphics, anti aliasing improves the appearance of polygon edges, so they are not "jagged", but smoothed out on the screen. However, it incurs a performance cost for the graphics card and uses more video memory. The level of anti-aliasing determines how smooth polygon edges are (and how much video memory it consumes).• I found this at
  4. 4. Resolution• Image resolution is an umbrella term that describes the detail an image holds. The term applies to raster digital images, film images, and other types of images. Higher resolution means more image detail.• Image resolution can be measured in various ways. Basically, resolution quantifies how close lines can be to each other and still be visibly resolved. Resolution units can be tied to physical sizes (e.g. lines per mm, lines per inch), to the overall size of a picture (lines per picture height, also known simply as lines, TV lines, or TVL), or to angular subtenant. Line pairs are often used instead of lines; a line pair comprises a dark line and an adjacent light line. A line is either a dark line or a light line. A resolution of 10 lines per millimetre means 5 dark lines alternating with 5 light lines, or 5 line pairs per millimetre (5 LP/mm). Photographic lens and film resolution are most often quoted in line pairs per millimetre.• I found this information at
  5. 5. Aspect Ratio• The aspect ratio is an image projection attribute that describes the proportional relationship between the width of an image and its height.• It is expressed as two numbers separated by a colon. That is, for an x:y aspect ratio, no matter how big or small the image is, if the width is divided into x units of equal length and the height is measured using this same length unit, the height will be measured to be y units. For example, consider a group of images, all with an aspect ratio of 16:9. One image is 16 inches wide and 9 inches high. Another image is 16 centimetres wide and 9 centimetres high. A third is 8 yards wide and 4.5 yards high.• I found this information at
  6. 6. File Formats• GIF – CompuServes Graphics Interchange Format• JPEG, JFIF (.jpg or .jpeg) – Joint Photographic Experts Group – a lossy image format widely used to display photographic images.• EPS – Encapsulated Postscript• TIFF (originally standing for Tagged Image File Format) is a file format for storing images, popular among graphic artists, the publishing industry, and both amateur and professional photographers in general• PSD (Photoshop document), the default file extension of the proprietary file format of Adobe Systems Photoshop program.• Portable Document Format (PDF) is an open standard for document exchange. This file format, created by Adobe Systems in 1993, is used for representing documents in a manner independent of application software, hardware, and operating systems• I found this at,,
  7. 7. Colour Model• A colour model is an abstract mathematical model describing the way colours can be represented as tuples of numbers, typically as three or four values or colour components. When this model is associated with a precise description of how the components are to be interpreted (viewing conditions, etc.), the resulting set of colours is called colour space. This section describes ways in which human colour vision can be modelled.• I found this information at
  8. 8. Adobe Photoshop• Adobe Photoshop is a graphics editing program developed and published by Adobe Systems Incorporated.• Adobes 2003 "Creative Suite" rebranding led to Adobe Photoshop 8s renaming to Adobe Photoshop CS. Thus, Adobe Photoshop CS5 is the 12th major release of Adobe Photoshop. The CS rebranding also resulted in Adobe offering numerous software packages containing multiple Adobe programs for a reduced price. Adobe Photoshop is released in two editions: Adobe Photoshop, and Adobe Photoshop Extended, with the Extended having extra 3D image creation, motion graphics editing, and advanced image analysis features• I found this at
  9. 9. Adobe Illustrator• Adobe Illustrator is a vector graphics editor developed and marketed by Adobe Systems. Illustrator is similar in scope, intended market, and functionality to its competitors, CorelDraw, Xara Designer Pro and Macromedia FreeHand. The latest version, Illustrator CS5, is the fifteenth generation in the product line.• I found this at
  10. 10. Adobe InDesign• Adobe InDesign is a software application produced by Adobe Systems. It can be used to create works such as posters, flyers, brochures, magazines, newspapers and books. InDesign can also publish content suitable for tablet devices in conjunction with Adobe Digital Publishing Suite. Graphic designers and production artists are the principal users, creating and laying out periodical publications, posters, and print media. It also supports export to EPUB and SWF formats to create digital publications, and content suitable for consumption on tablet computer devices. The Adobe InCopy word processor uses the same formatting engine as InDesign.• I found this at