Image Processing with Matlab, Part 3

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• Misc
  • First hour exam
    • When to have it? Friday
    • Material since beginning of semester (e.g., basic expressions, vectors, matrices, plotting, scripts)
    • 3 - 5 short-answer questions
    • Whole class period
    • Open book, notes, computer; closed person
  • Dates for image processing lab (lesson 4)
    • Finish by Friday Oct 17
    • Grade by Thursday Oct. 23
• Questions?
• Chroma Key Effects in Matlab
  • Algorithm ideas
    • Colors aren’t as pure as they seem
      • Compare to ranges
        

        C = chromakey( S, B, r )
        	% Build logical matrix, M, with 1 wherever pixel in S has color in background range
        	M = S == r        % M = 1 for bkgnd in S
        	% Substitute pixels from B into S where M = 1
        	C = S.*(1-M) + B.*M

• Next
  • Code above algorithm in Matlab
  • Test Friday

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