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Unformatted text preview: Multimedia Module No: CM0340 Laboratory Worksheet Lab 5 (Week 6): MATLAB Graphics Images and Video Formats Prof. D. Marshall Aims and Objectives After working through this worksheet you should be familiar with: Colourmaps in 8-bit images Graphics and Image Colour Spaces Chroma Subsampling Aliasing effects due to subsampling The basic use of MATLAB to investigate the above. None of the work here is part of the assessed coursework for this module 1 MATLAB Graphics Images and Video Formats 1. Dithering : Implement a Dithering algorithm in MATLAB. A basic approach to dithering is described in the lecture notes ( http://www.cs.cf.ac.uk/Dave/Multimed You may use the Lena images (as used in lecture notes example): http://www.cs.cf.ac.uk/Dave/Multimedia/exercises BSC/lena.bmp Hint: See lecture notes and also this lab class hint sheet ( http://www.cs.cf.ac.uk/Dave/Multimed 2. Colourmaps : Load the example image from the tutorials, parrots.gif , into a MATLAB array. The image is downloadable from: http://www.cs.cf.ac.uk/Dave/Multimedia/exercises BSC/parrots.gif Read in the image and its corresponding colourmap to appro-...
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This note was uploaded on 01/26/2012 for the course CM 0340 taught by Professor Davidmarshall during the Fall '09 term at Cardiff University.
- Fall '09