Btec creative media production digital graphics technology
Post on 14-May-2015
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- 1.What do you know about digital graphics?
2. LEARNING OBJECTIVES LIST A RANGE OF CONSIDERATIONS RELATING TO DIGITAL GRAPHICS TECHNOLOGY DESCRIBE FEATURES OF DIGITAL GRAPHICS TECHNOLOGY WITH REFERENCE TO EXAMPLES 3. DIGITAL IMAGES: TWO KINDS OF IMAGE1.Vector 2.Bitmap (Raster) 4. VECTOR Made of points, lines and curves the image is built and displayed through mathematical expressions. It can be scaled (re-sized) and will not loose clarity or quality. Resolution-independent can be printed at any resolution. 5. VECTOR CONT Common file formats: .ai, .cdr, .ps, .pdfs Common vector graphic programmes: Adobe illustrator, CorelDraw, FreeHand Common uses of vector graphics: Drawing, illustrations, cartoons 6. BITMAP (RASTER) Made up of pixels. Resolution-dependent - it can not be scaled up without loosing quality. 7. BITMAP (RASTER) CONT Common bitmap files: .jpg, .jpeg, .gif, .png, .tif, .tiff, .bmp Common bitmap programmes: Paint, Photoshop Common bitmap images: Photographs and Paintings. 8. PIXEL The smallest part of a bitmap (raster) Image. This pixel will have a single colour. If you zoom in far enough, or scale a bitmap image up, you can see its pixels. OR The smallest controlled element of a screen. Each pixel on a screen emits Red, Green and Blue light. By changing the levels of each colour (Red, Green and Blue) your screen is able to produce every possible colour. 9. FACTORS WHICH IMPACT IMAGE QUALITY Compression: this is when you try to reduce the size of a file, perhaps to make it easier to send to someone else. By compressing the image you loose data, this means you loose quality. 10. Resolution: this is the size of a image. It is how many pixels tall, and wide, an image is.The higher the resolution = the better the quality.However this means the file size is larger.Resolution only applies to bitmap images. 11. IMAGE CAPTURING 1. 2. 3.Scanning an image which has been drawn. This image can not be resized without loosing quality.Digitally drawing an image in Photoshop with a sketchpad and stylus. This image can be resized, providing it is being drawn as a vector image.Using a digital camera. Simply takes a photo which is saved digitally. Stored as a bitmap image, so will loose quality if re-sized. 12. OUTPUT How an image will be outputted often determines the kind of image it needs to be.Outputs: Print (Paper), Screen & OnlinePrint: Printing uses the CYMK Colour Pallet (Cyan, Yellow, Magenta, Black) Screen: Use pixels to display and image, so uses the RGB Colour Pallet (Red, Green, Blue) 13. STORAGE File size: the larger an image is, or the higher its resolution, the larger the file is: Harder to email Longer to download Takes up more space in a computers memory 14. STORAGE CONT Naming conventions: It is important to save work with suitable names so you, or others, can locate them. If you are working on a large project as part of a team your files must be organised and named appropriately. Work 1, Image2, Background5 are not clear enough. Website_Banner_Background, New_Company_Logo_hidef etc are more exact, and eaiser for others to find, and understand, without having to open and look at lots of other images. 15. STORAGE CONT 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 This means others are able to use and access your work, and you are able to access theirs more efficently