Vibratory tactile display: a fractal Brownian approach

This paper deals with the formulation of a height profile model for a vibratory tactile display unit using the concept of fractal dimensions and fractal Brownian motion. The paper discusses, in brief, the theory of fractals and the imaging process. The fractal dimension from image data is calculated using second-order statistics and the Fourier power spectrum. The image fractal model is then used to separate out the homogeneous and inhomogeneous regions. An algorithm is presented to compute the fractal dimension of various blocks; second-order statistics for homogeneous regions and another method for inhomogeneous regions. The algorithm is implemented on synthetic textures as well as on real images.