On the Use of Gradient Space Eigenvalues for Rotation Invariant Texture Classification

Many image-rotation invariant texture classification approaches have been presented previously. This paper proposes a novel scheme that is surface-rotation invariant. It uses the eigenvalues of a surface's gradient-space distribution as its features. Unlike the partial derivatives, from which they are computed, these eigenvalue features are invariant to surface rotation. First we show that a simple classifier using a single isotropic feature (grey-level standard deviation) is not invariant to surface rotation. Then a practical surface rotation invariant classifier that uses photometric stereo to estimate surface derivatives is developed. Results for both classifiers are presented.

• Type: Conference
• Year: 2000
• Where: ICPR
• Authors: Mike J. Chantler, Ged McGunnigle
• Keywords: Computer Vision, ICPR 2000, Invariant Texture Classification, Rotation Invariant Classifier, Surface Rotation