Images

1. Vector-drawn graphics

1.1. How vector-drawn images work A vector is a line that is described by the location of its two endpoints. Vector drawing makes use of Cartesian coordinates. Cartesian coordinates are numbers that describe a point in two- or three-dimensional space as the intersection of the X, Y, and Z axes.

1.2. Advantages: Vector images use less memory space. For the Web, pages that use vector graphics in plug-ins download faster and, when used for animation, draw faster than bitmaps. Vector objects are easily scalable without loss of resolution or image quality. Easy to edit the drawings as each object is independent of the other. Disadvantages: Objects/drawings cannot have texture. cannot be used for photorealistic images.

2. color models

2.1. Additive color In the additive color method, a color is created by combining colored light sources in three primary colors - red, green, and blue (RGB).

2.2. Subtractive color In the subtractive color method, color is created by combining colored media such as paints or ink.

3. Image File Types: 1) Macintosh formats 2)Windows formats 3) Cross-platform formats

4. What is Texture? refers to the properties held and sensations caused by the external surface of objects received through the sense of touch

5. Bitmaps:

5.1. A bitmap is a simple matrix of the tiny dots that form an image and are displayed on a screen or printed.

5.2. Advantages Can have different textures on the drawings; detailed and comprehensive. Disadvantages Large file size Not easy to make modification to objects/drawings Resizing a bitmapped image requires either duplicating pixels. Graphics become "blocky" when the size is increased.

5.3. Legal rights Public domain Royalty-free Right-managed