This paper presents a novel peer group filtering method, called the NPGF method, for impulse noise reduction. The main contributions of the proposed method are two-fold. First, we propose that the impulse noise detection is performed in the CIELab, instead of the RGB, color space to enhance noise detectability. Secondly, the proposed method employs two different-sized windows in determining the...

In this paper, noise reduction performance of a switching vector median filter with a random-valued impulse noise detector for color images is evaluated. As a random-valued impulse noise detector, a method utilizing the minimum spanning tree (MST) is employed. In the switching vector median filter, the impulse noise detector is employed before filtering, and the detection result is used to cont...

This paper focuses on fuzzy image denoising techniques. In particular, we develop a new fuzzy impulse noise detection method. The main difference between the proposed method and other state-of-the-art methods is the usage of the colour components for the impulse noise detection method that are used in a more appropriate manner. The idea is to detect all noisy colour components by observing the ...

Digital filter provide an important role in world of communication and computation. The main aim of Designing a digital finite impulse response (FIR) filter is to provided the better solution which satisfying all the conditions for the practical application and researcher design different techniques for reduction of noise from signal and improved the efficiency of the signal. All these techniqu...

The paper presents a new image denoising method for impulse noise in grayscale images using a context-based prediction scheme. The algorithm replaces the noisy pixel with the value occurring with the highest frequency, in the same context as the replaceable pixel. Since it is a context-based technique, it preserves the details in the filtered images better than other methods. In the aim of vali...

Over the last decade of the 20th century, the emerging ultrawide-band (UWB) impulse technology has found numerous applications in the commercial as well as the military sectors. The rapid technological advances have made it possible to implement (cost-effective, short-range) impulse radar and impulse-radio communication and localization systems. Array beamforming and space–time processing techn...

Among the many uses for sensitivity analysis is factor prioritization—that is, the determination of which factor, once fixed to its true value, on average leads to the greatest reduction in the variance of an output. A key assumption is that a given factor can, through further research, be fixed to some point on its domain. In general, this is an optimistic assumption, which can lead to inappro...

Pulse shaping filters have been designed and implemented by using Raised cosine filter, Nyquist filter and optimized half band filters for software defined radio (SDR) based wireless applications. In signal processing, a finite impulse response (FIR) filter is a filter whose impulse response (or response to any finite length input) is of finite duration, because it settles to zero in finite tim...

This paper addresses the problem of designing nite precision one-dimensional (1-D) innnite impulse response (IIR) digital lters for video processing. The design algorithm is based on simultaneous minimization of magnitude, phase and stability errors in a discrete space of solutions using simulated annealing. It is demonstrated that the approach results in lters characterized by a substantially ...

Impulse The word ’impulse’ is used in many areas in different ways. In classical mechanics, the impulse is the integral of force with respect to time. It is also used to refer to a fast-acting force, which is often idealized by a step function or a delta function. In this text, it is used to represent any functional form of pressure increase, either static or transient, which can generate obser...