Modern cryptographic practice rests on the use of one-way functions, which are easy to
evaluate but difficult to invert. Unfortunately, commonly used one-way functions are either …

It is often suggested that efficient neural codes for natural visual information should
besparse'. However, the termsparse'has been used in two different ways-firstly to describe …

Gabor schemes of multiscale image representation are useful in many computer vision
applications. However, the classic Gabor expansion is computationally expensive due to the …

A method of image analysis is proposed for detection of local defects in materials with
periodic regular texture. A general improvement and enlargement of vision system …

We describe the Berkeley wavelet transform (BWT), a two-dimensional triadic wavelet
transform. The BWT comprises four pairs of mother wavelets at four orientations. Within each …

Gabor filter is a widely used feature extraction method, especially in image texture analysis.
The selection of optimal filter parameters is usually problematic and unclear. This study …

This paper analyzes how the natural scales of the shapes in 2D images can be extracted.
Spatial information is analyzed by multiple units sensitive to both spatial and spatial …

The use of wavelets has grown enormously since their original inception in the mid-1980s.
Since the wavelet data representation combines spatial, frequency, and scale information in …

The problem of representing the visual signal in the harmonic space guaranteeing a
complete characterization of its 2D local structure is investigated. Specifically, the efficacy of …

Multiresolution analysis of fMRI studies using wavelets is a new approach, previously
reported to yield higher sensitivity in the detection of activation areas. No data are available …