Electrochromic graduated filters with symmetric electrode configuration

Development of Flexible Electrochromic Device with Thin Film Configuration

Demystifying Symmetric Smoothing Filters

Many patch-based image denoising algorithms can be formulated as applying a smoothing filter to the noisy image. Expressed as matrices, the smoothing filters must be row normalized so that each row sums to unity. Surprisingly, if we apply a column normalization before the row normalization, the performance of the smoothing filter can often be significantly improved. Prior works showed that such...

Theory and Realization of Simple Bandpass Filters with Antiparallel Configuration

This paper introduces a theoretical analysis as well as a design example for bandpass filters (BPF) with a distinctive topology. Based on the analysis of simple two-port symmetrical lossless networks with a parallel structure, a method for obtaining normalized BPF prototypes with desired bandwidths was developed. These prototypes can be scaled to any central frequency and symmetrical real termi...

From Broadband to Electrochromic Notch Filters with Printed Monochiral Carbon Nanotubes

Dense layers of semiconducting single-walled carbon nanotubes (SWNTs) serve as electrochromic (EC) materials in the near-infrared with high optical density and high conductivity. EC cells with tunable notch filter properties instead of broadband absorption are created via highly selective dispersion of specific semiconducting SWNTs through polymer-wrapping followed by deposition of thick films ...

Design of orthonormal symmetric wavelet filters using real allpass filters

In this paper, a class of real-valued orthonormal symmetric wavelet "lters is constructed by using allpass "lters, and a new method for designing the allpass-based wavelet "lters with the given degrees of #atness is proposed. The proposed method is based on the formulation of a generalized eigenvalue problem by using the Remez exchange algorithm and considering the #atness condition. Therefore,...