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A model-based texture recognition system which classifies image textures seen from different distances and under different illumination directions is presented in this book. The system works on the basis of a surface model obtained by means of 4-source Colour Photometric Stereo (CPS), used to generate 2D image textures as they would have appeared if imaged under different imaging geometries. The proposed recognition system combines co-ocurrence matrices for feature extraction with a Nearest Neighbour classifier. The use of the co-occurrence matrices instead of filtering methods for feature…mehr

Produktbeschreibung
A model-based texture recognition system which
classifies image textures seen from different
distances and under different illumination directions
is presented in this book. The system works on the
basis of a surface model obtained by means of
4-source Colour Photometric Stereo (CPS), used to
generate 2D image textures as they would have
appeared if imaged under different imaging
geometries. The proposed recognition system combines
co-ocurrence matrices for feature extraction with a
Nearest Neighbour classifier. The use of the
co-occurrence matrices instead of filtering methods
for feature extraction allows us to utilise only
pixels for which valid information has been extracted
by CPS.
The validity of the method is demonstrated by
classifying texture images captured under different
imaging geometries than the reference images in the
database. Moreover, the process of recognition allows
one to guess the approximate direction of the
illumination used to capture the test image.
Autorenporträt
Xavier Lladó received the B.S. degree in Computer Science in
1999, and the PhD in Computer Engineering in 2004. Currently, he
is a lecturer at the University of Girona. His research interests
are in the field of image processing and computer vision,
focusing on Colour and Texture analysis, Shape from Shading, and
Non-rigid Structure from Motion.