A nonexpansive pyramidal decomposition is proposed for low-complexity image coding. The image is decomposed through a nonlinear filterbank into low- and highpass signals and the recursion of the filterbank over the lowpass signal generates a pyramid resembling that of the octave wavelet transform. The structure itself guarantees perfect reconstruction and we have chosen nonlinear filters for pe...

An efficient method for the design of nonrecursive digital filters using the ultraspherical window function is proposed. Economies in computation are achieved in two ways. First, through an efficient formulation of the window coefficients, the amount of computation required is reduced to a small fraction of that required by standard methods. Second, the filter length and the independent window ...

abstract human blood and blood products is the source of a wide range of medicinal products used for the treatment and prevention of a variety of injuries and disease. despite stringent routine measures and filters employed, residual pathogen infectivity remains an important challenge in the field of blood transfusion. in this article various measures and technologies that can be applied in ord...

one of the main problems in micro irrigation system is inappropriate combination and in some cases inappropriate performance of filters and sand tanks in central control systems which cause reduction in efficiency of system and increasing of operating costs. this study evaluates affect the amount of algae on the performance of disc filters sand tank in research farm deputy of soil and water and...

Median filter is quite effective in recovering the images confounded by salt and pepper noise. It discards outliers (impulses) effectively, but it fails to provide adequate smoothing for images corrupted with non-impulse noise. In this paper, two nonlinear techniques for image filtering, namely, New Filter I and New Filter II are proposed based on a nonlinear high-pass filter algorithm. New Fil...

Aggressive scaling of semiconductor devices exacerbates issues of reliability. Stochastic logic, which operates on probabilistic signals, takes advantage of randomness resulting in a more reliable system with simple hardware. In this paper, we present our stochastic design of low-pass (smoothing) and highpass (sharpening) filters. We modeled our design in Verilog and synthesized the design. The...

In this paper, new configurations of voltagemode biquadratic filters with single input and three outputs are presented. The proposed configurations employ a DDCC (Differential Difference Current Conveyor) variant namely the Unity-Gain Sum Difference Amplifier (UGSDA) and use two operational transconductance amplifiers (OTAs) and two grounded capacitors. The circuits have the following advantage...