The results of research on rank filters are presen ted. The relationship of rank filters with other filters is briefly discussed. The main properties of rank filters are listed and an explanation is given for these properties. Several software and hardware implementations of the filter are described. Major applications to image processing are discussed, including noise smoothing, cluster detect...

A new blind inverse halftoning algorithm based on a nonlinear ltering technique of low computational complexity and low memory requirement is proposed in this research. It is called blind since we do not require the knowledge of the halftone kernel. The proposed scheme performs nonlinear ltering in conjunction with edge enhancement to improve the quality of an inverse halftoned image. Distinct ...

Method for noise suppressing edge enhancement based on genetic algorithm taking into account complexity of target images measured with fractal dimension is proposed. Through experiments with satellite remote sensing imagery data with additive noise, it is found that the proposed method shows appropriate edge enhancing performance with suppressing the additive noise in accordance with complexity...

In order to improve medical image visual quality, this paper presents a new method for unsharp masking for edge preservation and contrast enhancement of an image. Our approach employs a classical unsharp mask filter for the enhancement of the medical images, which will not only preserve the edge but also maintain the contrast that is suitable for body part. Image Enhancement transforms images t...

In color TV broadcasting standards, such as NTSC and PAL, the limited bandwidth of the chrominance signals produces relatively slow chrominance transitions, causing smeared color edges in the received images. In this paper, we present an adaptive color transient improvement algorithm for enhancing color edge transition of images. By using a local image feature dependent gain control function to...

Satellite image enhancement suffers from edge localization and distortion of detail. A novel satellite image enhancement is presented which enhance the edge detail as well as a quality of low-resolution satellite images. In the proposed approach, we improve and preserve the edge detail of a significant region using particle swarm optimization and fuzzy logic in the high spectral region. Further...

The local electric field enhancement at various regions of an individual nanometre-thin gold mesotriangle has been demonstrated both numerically and experimentally. This work provides, for the first time, direct experimental evidence of localized enhancement of Raman signals at three edges of nanometre-thin gold mesotriangles at single particle level, using Raman microscopy. Raman images were c...

Image enhancement is useful when the details in an image are lost due to various reasons. I t is common to subtract a mask from a given image to enhance the details. The trick is how to obtain a good mask. We describe here how an edge-preserving filter can be used to generate a mask which is smooth over areas with fine details, yet preserving most of the edges. Experiments with real images show...