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5. 3 Bitmapped & V.G
Bitmapped and Vector Graphics
| Term | Definition |
|---|---|
| Pixel | The smallest addressable area / smallest solid block colour in an image |
| Bitmap | Created when pixels of an image are mapped to positions in memory that store binary codes representing colour of each pixel |
| Resolution of a VDU screen | A quantity expressed as the no. of pixels per row by the no. of pixels per column |
| Resolution of an image | No. of dots / pixels per inch or cm |
| Colour depth | No. of bits used to represent colour of a single pixel in a bitmapped image |
| Vector Graphic | Records geometric and other information about the objects that make up an image |
| Object | A component of a vector graphic, such as: line, a rectangle or a circle |
| Drawing list | the list of drawing commands that recreate a vector graphic |
| Property | of a vector graphic object, describes things such as the: size, direction, thickness, shading, font size or typeface. |
| Data compression | squeezes data into a smaller number of bytes than the data would occupy if uncompressed. |
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LexiL
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