lecture 07 roger s gaborski n.
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Lecture 07 Roger S. Gaborski. Introduction to Computer Vision. QUIZ 2. Simple 1 D Averaging Example. 3 point moving average 5 point moving average. Simple 1 D Averaging Example. 3 point moving average 5 point moving average NEED FOR PADDING. Padding an array -- padarray.

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Introduction to Computer Vision


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    1. Lecture 07 Roger S. Gaborski Introduction to Computer Vision Roger S. Gaborski

    2. QUIZ 2

    3. Simple 1 D Averaging Example • 3 point moving average • 5 point moving average

    4. Simple 1 D Averaging Example • 3 point moving average • 5 point moving average • NEED FOR PADDING

    5. Padding an array -- padarray • fp = padarray(f, [r c], method, direction) • f is input image • fp is padded image • [r c] is number of rows and columns to pad f • method and direction – next slide Roger S. Gaborski

    6. Chapter 3 www.prenhall.com/gonzalezwoodseddins Roger S. Gaborski

    7. padarray Example >> f = [1 2; 3 4] f = 1 2 3 4 >> fp = padarray(f, [3 2], 'replicate', 'post') fp = 1 2 2 2 3 4 4 4 3 4 4 4 3 4 4 4 3 4 4 4 Post – pad after the last element in both directions [3 2] – pad 3 rows and 2 columns Roger S. Gaborski

    8. >> fp = padarray(f, [2 1], 'replicate', 'post') fp = 1 2 2 3 4 4 3 4 4 3 4 4 Post – pad after the last element in both directions [2 1] – pad 2 rows and 1 columns Roger S. Gaborski

    9. >> f = [1 2 3; 1 2 3; 1 2 3] f = 1 2 3 1 2 3 1 2 3 >> fp = padarray(f, [2 2], 'symmetric', 'both') fp = ?????? Roger S. Gaborski

    10. >> f = [1 2 3; 1 2 3; 1 2 3] f = 1 2 3 1 2 3 1 2 3 >> fp = padarray(f, [2 2], 'symmetric', 'both') fp = 2 1 1 2 3 3 2 2 1 1 2 3 3 2 2 1 1 2 3 3 2 2 1 1 2 3 3 2 2 1 1 2 3 3 2 2 1 1 2 3 3 2 2 1 1 2 3 3 2 Roger S. Gaborski