Graphical images
- Created by: frankie306
- Created on: 21-04-15 15:03
View mindmap
- Represeting Images
- pixel
- picture cell - a dot that makes up a part of n image
- bit maps
- images stored as a series of bits
- each bit = a part of the image
- JPEG, GIF, PNG
- resolution
- number of pixels per unit length
- affects clarity of image
- larger resolution = larger memory
- vector images
- Uses shapes to define parts of the image
- efficient
- not every pixel needs to be saved
- SVG = scalable vector graphics
- autoshapes - micosoft offices
- animated movies, PDF's
- Image display
- rasterised - vector image is converted into pixels
- colour depth
- measured in bits
- number of bits = how many colours available for each pixel
- Metadata - data about data
- filename
- file format
- resolution
- colour depth
- Compression
- reduce file sizes
- PNG - lossless - high quality
- JPEG
- lossy
- GIF - unsuitable lity photographs
- pixel
Comments
No comments have yet been made