An operator based on Products of Linear Filters is introduced in this Communication to perform image contrast enhancement. Translation invariance and isotropy conditions are derived. The proposed technique avoids noise ampliication and is able to sharpen even small details.

Organizational safety culture has been a focus of research in sociotechnical systems, such as civil aviation, as organizational factors have been increasingly noted as contributory to accidents. The aim of the present study was to validate the Commercial Aviation Safety Survey (CASS), developed at the University of Illinois, in the context of Chinese flight operations. Two specific goals of thi...

Both celestial and momentum space amplitudes in four dimensions are beset by divergences resulting from spacetime translation sometimes scale invariance. In this paper we consider a (linearized) marginal deformation of the CFT for Yang-Mills theory which preserves 2D conformal invariance but breaks both involves chirally coupled massive scalar. The completely finite (apart usual soft collinear ...

Extrastriate area V4 is a critical component of visual form processing in both humans and non-human primates. Previous studies have shown that the tuning properties of V4 neurons demonstrate an intermediate level of complexity that lies between the narrow band orientation and spatial frequency tuning of neurons in primary visual cortex and the highly complex object selectivity seen in inferotem...

Visual perception of transformation invariance, such as translation, rotation and scaling, is one of the important functions of processing visual information in the Brain. To simulate this perception property, we propose a computational model for perception of transformation. First, we briefly introduce the transformation-invariant basis functions learned from natural scenes using Independent C...

It is well known that x-translation and t-translation invariance of (1) leads to the following symmetries: ux, ut of the KdV equation (1). In order to find more generalized symmetries, the concepts of recursion operators or strong symmetries, and hereditary symmetries were introduced by Olver and Fuchssteiner and used to find these symmetries [1, 2]. Furthermore, Galilean invariance of the KdV ...