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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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- Fall '09
- Color space, Chroma subsampling, YUV