System information

Line art is also known as object-oriented graphics or vector graphics.
Figure 20: Line art describes shapes according to its geometric characteristics and is resolution-independent.
Pixel images
Pixel images are formed by a rectangular grid (also known as a bitmap or raster) of small squares,
known as pixels. Each pixel in a pixel image has a specific location and contains data that describes
whether it is black, white or a specific color value.
For example, a slanted line of a pixel image is composed of a collection of pixels in a specific
location, of which pixels A7 and A8 are black, B6 and B7 are black, etc.
Figure 21: A bitmap representation of a slanted line.
You can edit a pixel image by altering or manipulating pixels or groups of pixels. To do this, you
need image editing software, such as Adobe Photoshop.
Pixel images are resolution-dependent because the number of pixels that describe the graphic is
fixed. Scaling a pixel image will not change the absolute number of pixels, but will change the
number of pixels per square unit of measurement. Consequently, pixel images can appear jagged
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