Digital graphics technology


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Digital graphics technology

  1. 1. Unit 13: Assignment 1- Digital Graphics Technology Introduction: This report will talk about different types of Digital Graphics and Advantages and Disadvantages of each different type of digital graphics. Digital Graphics Technology: Digital Graphics Technology is Applying computer technology to create digital graphics. Digital graphics projects good design. But graphic designing is a totally different process where we use both natural skills with creativityto build real designs. Before digital imaging designers had to have great demonstration skills to realize their concepts. Bitmap: How are they Made? A Bitmap is a type of graphic composed of pixels (picture element) in a grid. Bitmap are made of Pixels of different colours. File Extensions Commonly used This is an image of a Bitmap Since the computer has to store information about every single pixelin the image, the file size of a bitmap graphic is often quite large. The BMP format stores color data for each pixel in the image without any compression. The JPEG and GIF formats are also bitmaps, but use image compression algorithms that can significantly decrease their file size. For this reason, JPEG and GIF images are used on the Web, while BMP images are often used for printable images. When they are used: Bitmap graphics are used for photographs, graphics with a wide range of colours and graphics with effects Bitmaps are used to create realistic graphics and images They are the most common type of graphic used and supported on digital systems Advantages of Bitmap: Yaqub Nur 12C
  2. 2. Unit 13: Assignment 1- Digital Graphics Technology Bitmaps are very easy to create. Take a picture with a digital camera, or scan something in and you’ve got one A bitmap image uses solid color pixels, which can be identified and recolored easily They are very cost effective. You can take a picture or scan in a drawing, and easily show it on the Internet or send in an email Disadvantages of Bitmap: The first one is in terms of digital storage. They are memory intensive, so the higher the resolution the larger the file will be. In terms of the amount of digital storage, bitmaps are memory intensive, and the higher the resolution, the larger the file size. Programs used to make these Graphics Programs which is used to make these Graphics is Corel Painterand Adobe fireworks Adobe Fireworks (formerly Macromedia Fireworks) is a bitmap and vector graphics editor Corel Painter is a raster-based digital art application created for drawing, painting and print marketing Talk about Pixels (Digital ones used to make bitmap images) Pixels are picture elements; tiny dots of individual color that make up what you see on your screen. All these tiny dots of color come together to form the images you see. Most computer monitors display approximately 70 to 100 pixels per inch--the actual number depends on your monitor and screen settings Vector: How are they Made? Vector graphics are created in graphics packages and consist of shapes called objects It is possible to edit each object separately, for example, change the shape, colour, sizeand position. This a image of a colourful Vector Vector Graphics are made out of Points, Line, Curves and shapes or polygons which are all based on mathematical expressions, to represent images in computer graphics File Extensions Commonly Used: The File size is small, as the computer stores details of objects, which do not require much memory. Yaqub Nur 12C
  3. 3. Unit 13: Assignment 1- Digital Graphics Technology The Common file extensions used for Vector Images is Cgm, .Svg, .Odg, .Eps, .xml When they are used: Vectors are used to create graphics such as interface elements (banners, buttons) text, line art and detailed drawings (plans, maps). Advantages of Vector: The most important and obvious plus point of vector images is their power of scalability Each set of lines in a vector image represent separate and distinct objects Vector graphics can easily represent simple geometric objects, in file sizes that are far smaller and faster to operate Disadvantages of Vector: Drawings containing trapping information can only be scaled up to 20 percent larger or smaller Thin lines may disappear if a vector drawing is reduced too much Another important disadvantage of vector is the time and talent needed to create it Programs used to make These Graphics: Programs that Vector Graphics use is AI (Adobe Illustrator) - is a vector graphics editor developed and marketed by Adobe Systems CDR (CorelDraw) - is a vector graphics editor developed and marketed by Corel Corporation of Ottawa, Canada CGM (Computer Graphics Metafile) - is a free and open international standard file format for 2D vector graphics, raster graphics, and text SWF (Shockwave Flash) - is an Adobe Flash file format used for multimedia, vector graphics and Action Script Factors That Effect Quality: Compression: This is when you try to reduce the size of a file, perhaps to make it easier to send to someone else andit compressed the image your loose data, this means you lose quality because you don’t know where your image will go Yaqub Nur 12C
  4. 4. Unit 13: Assignment 1- Digital Graphics Technology Resolution: This is the size of an image. It is how many pixels tall, and wide, an image is Resolution refers to the number of pixels in an image and is usually stated as dpi (dots per inch) or ppi (pixels per inch) You convert a vector to a bitmap at a size of 100 by 100 pixels and then decide you need the image to be larger, you'll need to go back to the original vector file and export the image again Resolution only applies to Bitmap Images Capturing Images: Advantage of Scanning Images: Flatbed scanners are very accurate and can produce reasonably high quality images. Any Images which is digitised by the scanner can then be included on electronic documents images once digested can be enhanced with a graphics application It can copy things onto computers then you can alter the things you copied Disadvantage of Scanning Images: The disadvantages of using scanners is that if there is a blackout, the whole system goes out Images can take up a lot of memory space images lose some quality in the scanning digitising process. The quality of the final image is dependent on the quality of the original image Advantages of Taking a Photograph: Digital photography is so popular is that you can see your picture as soon as you take it. Can view images immediately via screen Can make multiple copies with ease OutPut Print: Printing uses the CYNK, Colour, Pallet, Cyan, Yellow, Magenta, and Nackl Screen: Use pixels to display and image, so uses the RGB Colour Pallet (Red, Green, Blue Organisation Asset Management: When working on a project, or any work, it is Important to keep files organised. Save work, with suitable names, into correct folders Yaqub Nur 12C
  5. 5. Unit 13: Assignment 1- Digital Graphics Technology This means others are able to use and access your work, and you are able to access theirs more efficiently Conclusion In this report I have been talking about Bitmap images and what they are used for and also the Advantages and Disadvantages. I have also been talking about Vector Images and why they are used and how were they made. In My Opinion the research went good and that I you can use different methods to help me on this Course. This research I done was talking about Digital Graphics Technogely. Yaqub Nur 12C