1. Module Code: CU0001NI Introduction to Multimedia Week – 3 - Extra

2. Vector Drawing Programs provide a basic set of shapes that can easily be represented mathematically andmanipulated using anchor points and bézier curves Vector Graphics

5. Drawing Bitmaps

7. Antialiasing bitmap images

8. Understanding bitmap image file sizes Resoluton of scanners and printers usually described in terms of their pixel density, as dots per inch dpi; e.g. 2400 dpi Resoluton of a stills camera usually described by the total number of pixels it can capture in the largest image it can record; e.g. 24 Megapixels

9. Understanding bitmap image file sizes Image Size is determined by the number of pixels making up the image. The screen resolution and the image size determine how much of the screen is occupied by the image. For example, if the image size is 640 * 480 and the screen resolution is 640 * 480, then the image will occupy the entire screen.

11. File Formats: Graphic images can be saved in a variety of file formats. The popular formats include: TIFF (Tagged Image File Format) BMP (Bitmap) PCX (Windows Paint) PICT (Macintosh picture format), which are the standard file formats for multimedia development; JPEG (Joint Photographer Experts Group) GIF (Graphics Interchange File format) PNG (Portable Network Graphics), are the standard file formats for the World Wide Web.

14. Colour Theory Light is an electromagnetic wave. If we can see an object, that's because it is giving off or reflecting. The sun gives off light. Humans reflect light. When sunlight shines on us, we can reflect it, absorb it, or transmit it.

15. Colour Theory You see me because some light reflects off me. I stay warm because I absorb some sunlight. I see the sun because of the sunlight transmitted through my corneas to my retinas

16. Colour Theory "Light" is the limited range of electromagnetic wavelengths that are visible to the human eye. (Electromagnetic waves we don't see include x- ­‐ rays, infrared, ultraviolet, and radio.) "Colour" is our ability to distinguish one wavelength of light from another, just by looking at it.

17. Colour Theory Two basic colour systems Additive ; primary, direct light source Subtractive ; secondary, reflective light source

19. Primary System Red Green Blue Mixed together make white Additive Colours

20. Additive Colour System

21. Objects have no colour themselves Only the ability to reflect / absorb light No reflection = no colour Subtractive Colours

23. How we generally view colours (day to day) A Secondary System (reflected) Subtractive Colours

24. Cyan, Yellow, Magenta is a secondary system used in print, (blue red and yellow in painting) An absence of ink (assuming white paper) gives white, colour is subtracted out hence subtractive system Mixed together make Black In printing Black is an additional Colour Subtractive Colours

26. The colourwheel can be used as a valuable tool for determining harmonious colours etc. Primary Secondary Tertiary Vector Graphics

27. Source Wikipedia

28. Harmonious and Complementary Colours Harmonious colours are colours that work well together, that produce a colour scheme that looks attractive. The colourwheel can be used as a valuable tool for determining harmonious colours

29. Harmonious and Complementary Colours Complementary colours are colours directly across from each other on the wheel. These are typically colours that will produce a strong contrast. Triad colours represent three colours equidistant on the colourwheel; this typically provides a balanced colour scheme with reasonable contrast

30. Harmonious and Complementary Colours Analogous colours are colours next to each other on the colourwheel. They typically harmonize well but may not provide enough contrast. Monochromatic colours are all shades and tints of the same colour

31. Cool colours have a blue undertone, and include violets, blues, aquas, and greens. When they are used together, cool colours seem to move away from the viewer, and express coolness, detachment, stability, and calmness. Cool Colours

32. Warm colours are all those that have a yellow undertone, such as bright red, oranges, yellows, and green-­‐yellows, and are typically thought to express warmth, comfort, and energy. These colours also tend to make things stand out and advance towards you from the page or screen. Warm Colours

33. Black, grey, and whites are neutral; browns, beiges, and tans are sometimes considered to be neutral as well. Neutral colours are intended to send no messages but often work harmoniously with other colours. They are sometimes thought of as colours "off the colour Wheel” Neutral Colours

34. Hue = Pure colour Tint = Pure colour + white Shade = Pure colour + black Hues Tints and Shades

35. More visual contrast between a shape and its background the more weight the shape will have. Colour and Design

37. Complement of Blue = Yellow Complement of Red = Cyan

38. Bridget Riley

41. Hexadecimal Colours

42. Decimal system 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 Ten numbers wriNen in one character space Hexadecimal system 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F Sixteen numbers wriNen in one character space Hexadecimal Colours

43. Decimal system 10 x 10 = 100 hexadecimal system F x F = 16 x 16 = 256 Hexadecimal Colours

45. End of Slide