Frequency and orientation selective texture measures using linear symmetry and Laplacian pyramid

Josef Bigun

doi:10.1117/12.24147

1 September 1990 Frequency and orientation selective texture measures using linear symmetry and Laplacian pyramid

Josef Bigun

Proceedings Volume 1360, Visual Communications and Image Processing '90: Fifth in a Series; (1990) https://doi.org/10.1117/12.24147
Event: Visual Communications and Image Processing '90, 1990, Lausanne, Switzerland

Abstract

An efficient, new method for computing texture features based on dominant local orientation is introduced. The features are computed as the Laplacian pyramid is built up. At each level of the Laplacian pyramid, the linear symmetry feature is computed. This feature is anisotropic and estimates the optimal local orientation in the Least Square Error (LSE) sense. This corresponds to the orientation interpolation obtained from the filter responses of a polar gabor decomposition of the local image. The linear symmetry feature consists of two components, the local orientation estimate and its confidence measure based on the error. Since the latter is a measure of evidence for existence of a definite direction, the linear symmetry feature computed as proposed, has the property of orientation selectivity within each frequency channel. The algorithm is based on convolutions with simple separable filters and pixel-wise non-linear arithmetic operations. These properties allow highly parallel implementation, for example on a pyramid machine, yielding real time applications. Experiments based on test images of natural textures are presented.

Citation Download Citation

Josef Bigun "Frequency and orientation selective texture measures using linear symmetry and Laplacian pyramid", Proc. SPIE 1360, Visual Communications and Image Processing '90: Fifth in a Series, (1 September 1990); https://doi.org/10.1117/12.24147

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