In this paper, we present an Unsharp Masking-based approach for edge enhancing for TV application. The proposed scheme enhances the true details, limits the overshoot near sharp edges and attenuates the temporal artifacts which are visible in an image sequence. Simulations show that the processed sequence presents sharp edges which make it more pleasant to the human eye. Moreover, the amount of...

In this paper we propose an improved unsharp masking algorithm. Contrast enhancement and image sharpness is required in many applications. Unsharp masking is a classical tool for sharpening an image. Unsharp masking algorithm is used for the exploratory data model as a unified framework. Proposed algorithms have three issues: 1) Contrast is increased and image is sharp by means of individual tr...

Frequency-response masking (FRM) approach is a very efficient method for designing linear-phase FIR digital filters with general passbands and sharp transition bands. The FRM approach has recently been adapted to design cosine-modulated filter banks (CMFB). The resulting structure is a two-stage filter formed by the polyphase decomposition of the base filter in cascade with the decomposition of...

The linear Unsharp Masking technique used in image contrast enhancement is modiied in this paper, by introducing a control term expressed as a rational function of the local input data. In this way, noise ampliication is avoided and, at the same time, overshoot eeects on sharp edges are limited. Experimental results support the validity of the method, even as a preprocessor for interpolation sy...

In software defined radio (SDR), sharp filters of different bandwidth are required to fine tune the desired channel. This requires different computational resources and large number of filter coefficients. This paper proposes a continuously variable bandwidth sharp finite impulse response (FIR) filter with low distortion and low complexity. For this, a fixed length FIR filter is used with two a...

Digital filters find wide variety of applications in modern digital signal processing systems [1, 2]. As a result of the recent progress in such systems, there is an ever growing demand for sharp transition band digital filters. These narrow transition bandwidth digital filters are usually designed by using the frequency response masking (FRM) approach [3]. The computational efficiency of the F...

In this paper, we present a new approach to realize sharp 2-D FIR filters using the frequency response masking technique. The synthesis of three common 2-D filters namely the diamond-shaped, fan-shaped and hexagonal-shaped filters are considered. Significant amount of complexity reduction (as compared to direct-form implementations) can be achieved for filters with very narrow transition bands....

Static visual stimuli are smeared across the retina during saccades, but in normal conditions this smear is not perceived. Instead, we perceive the visual scene as static and sharp. However, retinal smear is perceived if stimuli are shown only intrasaccadically, but not if the stimulus is additionally shown before a saccade begins, or after the saccade ends (Campbell & Wurtz, 1978). This inhibi...

in order to the enhancement of the quality of speech corrupted by additive noise, a speech enhancement method has been put forward based on the combination of spectral subtraction and binary masking. spectral subtraction is a powerful method for removing noise from speech and binary masking provides essential elements to be used in monaural speech segregation. in the proposed combined method, f...

Because object and self-motion are ubiquitous in natural viewing conditions, understanding how the human visual system achieves a relatively clear perception for moving objects is a fundamental problem in visual perception. Several studies have shown that the visible persistence of a briefly presented stationary stimulus is approximately 120 ms under normal viewing conditions. Based on this dur...