Image Enhancement using Edge Sharpening and Bidirectional Smooth Histogram Stretching

Medical Image Enhancement Algorithm Using Edge-Based Denoising and Adaptive Histogram Stretching

In the production of medical images, noise reduction and contrast enhancement are important methods to increase qualities of processing results. Wavelet transforms have shown promising results for localization in both time and frequency, and hence have been used for image processing applications including noise removal. By using the edge-based denoising and adaptive nonlinear histogram stretchi...

Adaptive Image Sharpening Method Using Edge Sharpness

This paper proposes a new method for automatic improvement in image quality through adjusting the image sharpness. This method does not need prior knowledge about image blur. To accomplish this work, the authors developed a new method for evaluating image sharpness without MTF. This is called image "edge sharpness* value. According to the subjective experiments, optimal edge sharpness value for...

Contrast Enhancement and Foreground Image Sharpening using Dynamic Stochastic Resonance

In this paper we enhanced poor illuminated low contrast image and sharpen the foreground part using stochastic resonance (SR). Noise generally hinders communication system. But by using SR image, performance is improved by adding noise. At an optimum noise level SNR performance become appreciable. Literally this pixel dynamics concepts adopts particle mechanics following Benzi’sbistable model. ...

Transform Coefficient Histogram and Edge Preserving Image Enhancement Using Contrast Entropy

Enhancing an image in such a way that maintains image edges is a difficult problem. Many current methods for image enhancement either smooth edges on a small scale while improving contrast on a global scale or enhance edges on a large scale while amplifying noise on a small scale. Many applications of histograms for the purposes of image processing are well known. However, applying this process...

Multiscale image sharpening adaptive to edge profile