Skin Color Modeling of Digital Photographic Images

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• According to Eq. (3) 2 ⎛ ( xi −x0) ( xi −x0)( yi − y0) ( xi −x0)( zi −z0) ⎞ n 1 ⎜ 2 ⎟ Λ= ∑ f( xi, yi, zi) × ( xi x0)( yi y0) ( yi y0) ( yi y0)( zi z0) N ⎜ − − − − − ⎟ i= 1 ⎜ 2 ( xi −x0)( zi −z0) ( yi − y0)( zi −z0) ( zi −z0) ⎟ ⎝ ⎠ • Rewriting ellipsoid function (10) Φ ( x, y, z) = u ( x− x ) + u ( x−x )( y− y ) + u ( y− y ) + u ( x−x )( z− z ) + u ( y− y )( z−z ) • Rewritten Eq. (1) 2 2 0 0 1 0 0 2 0 3 0 0 4 0 0 5( 2 0) + u z−z where u = λ , u λ + λ , u = λ , u λ + λ , u λ + λ , and u = λ 0 00 1= 01 10 2 11 3= 02 20 4= 12 21 5 22 Φ = Λ T T −1 ( X'') X'' Mr MX r '' T −1 T where 3X3 diagonal matrix M M r M r, (X'')=X'' MX '' for rotating X ' to X '' = Λ Φ (11) (12) (13) 10/29
Construction an image database to train skin models – Aim of skin color detection • Capturing images using different digital cameras − Using various conditions for training skin color models • Development of skin color models − Preferred skin color enhancement in digital images • Using Halloween database − 2500 digital images » Caucasian, Asian, and African facial tones • Using Royal Photographic Society data base − 626 photographic images including indoor and outdoor images » Different ethnic types » Sampling uniform resolution of 1200X1800 11/29
Page 1 and 2: Skin Color Modeling of Digital Phot
Page 3 and 4: Color rendering - Important factor
Page 5 and 6: Methods of skin color detection - C
Page 7 and 8: - Ellipse skin color modeling • I
Page 9: - Ellipsoid skin color modeling •
Page 13 and 14: - Segmentation method in the tool
Page 15 and 16: - Lightness-independent ellipse mod
Page 17 and 18: • Skin color center − Plotted C
Page 19 and 20: − Plotted length of trained semim
Page 21 and 22: - Ellipsoid skin color model • Mo
Page 23 and 24: - Skin color detection accuracy •
Page 25 and 26: • Comparison of Caucasian, Asian,
Page 27 and 28: - Skin color modeling with differen
Page 29: Results of skin color ellipses - Tr

Skin Color Modeling of Digital Photographic Images

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