1. Unit 1: Task 1 By Abbie Llewellyn

2. Vector Graphic Software (Corel Draw) Computer graphics can be classified into two different categories: raster graphics and vector graphics. Many graphics programs focus completely on either vector or raster graphics, but there are a few that combine them in interesting ways. It is simple to convert from vector graphics to raster graphics, but going the other way is more difficult. Advantages: easily resized, produce smooth image, small file size. Disadvantage: long time to create, images produced aren’t real. Sources: http://www.sqa.org.uk/e-learning/BitVect01CD/page_97.htmhttp://www.sqa.org.uk/e-learning/BitVect01CD/page_97.htm

3. Bitmap Software (Paint) In computer graphics, a bitmap or pixmap is a type of memory organization or image file format used to store digital images. The term bitmap comes from the computer programming terms, meaning just a map of bits. Unfortunately, the case with vector file formats where many programs can only deal with their own file formats and a very limited choice. Sources: http://www.sqa.org.uk/e-learning/BitVect01CD/page_97.htmhttp://www.sqa.org.uk/e-learning/BitVect01CD/page_97.htm

4. Manipulation Software (Photoshop) Image editing includes the processes of changing images, whether they are digital photographs, traditional analog photographs, or illustrations. Traditional analogue image editing is known as photo retouching, using tools such as an airbrush to adjust photographs, or editing illustrations with any traditional art medium. Graphic software programs, which can be largely grouped into vector graphics editors, raster graphics editors, and 3d modelers, are the primary tools with which a user may control, improve, and transform images. Many image editing programs are also used to make or create computer art from scratch. BEFOREAFTER

5. How do they differ? Corel Draw, Paint and Photoshop are the same in how they all alter photos but photoshop is more advanced in many ways. You’re able to create many complicated but effective pictures/files on photoshop in a way that you can’t on any of the other documents. For example; Corel Draw and Photoshop both are able to change effects (sketch, black and white, sepia and many other ways), colours, improve facial features and also adjust in the slightest way. But on the other hand ‘Paint’ is more for text, even though you can use text on Corel Draw and Photoshop - Paint focuses more in many aspects.

6. What is the difference between Raster and Vector Graphics? 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. Bitmap ImageVector Graphic

7. Converting Files There are many reasons for converting files, one of the main reasons is that many websites require certain files you are able to use, for example bmp, png, gif, jpeg. Also certain files do not take up as much space, so when you convert files you are saving space. JPEG is widely used via web or email, mainly used for digital photography, whilst GIF (Graphic Interchange Format) is mainly pixels. Some images work better like JPEG doesn’t have a white background whilst PNG doesn’t or some different types of images Sources: http://www.labnol.org/software/how-to-convert-files/19523/http://www.labnol.org/software/how-to-convert-files/19523/

8. Different Types of Files BMP- Bitmap Image File - is a Raster graphics image file format used to store bitmap digital images. PNG- Portable Network Graphics - is a bitmapped image format that employs lossless data. GIF- Graphics Interchange Format - The format supports up to 8 bits per pixel therefore allowing a single image to mention a palette of up to 256 different colours. JPEG- Joint Photographic Experts Group - is a commonly used method of lossy compression for digital photography (image). LOSSY COMPRESSION is most commonly used to compress multimedia data (audio, video, and still images).

9. Compressing Files When compressing file it will make the file smaller but there are advantages like; it’s quicker to load, the same quality as before, easier to store and also quicker to download and send. Compression is used when burning films to a disc, it can reduce files sizes to about 5% of their normal size which helps as you will have a lot more space for other images. Some types of files, like JPEG pictures, are already highly compressed. If you compress several JPEG pictures into a folder, the total size of the folder will be about the same as the original collection of pictures to begin with. Sources: //windows.microsoft.com/en-gb/windows-vista/compress-and-uncompress- files-zip-files//windows.microsoft.com/en-gb/windows-vista/compress-and-uncompress- files-zip-files