Multivariate median filters have been proposed as generalisations of the well-established median filter for grey-value images to multi-channel images. As multivariate median, most of the recent approaches use the L median, i.e. the minimiser of an objective function that is the sum of distances to all input points. Many properties of univariate median filters generalise to such a filter. Howeve...

Optical coherence tomography (OCT) enables high-resolution and non-invasive 3D imaging of the human retina but is inherently impaired by speckle noise. This paper introduces a spatio-temporal denoising algorithm for OCT data on a B-scan level using a novel quantile sparse image (QuaSI) prior. To remove speckle noise while preserving image structures of diagnostic relevance, we implement our Qua...

We develop a serial algorithm for separable median filtering that requires only two comparisons per element when the window size is three. In addition, fast parallel CREW PRAM algorithms with good processor-time product are developed for separable median filtering and two dimensional median filtering.

This paper proposes a new video denoising technique where spatially adaptive noise filtering in wavelet (transform) domain is combined with temporal filtering in signal domain. AWGN is being considered which behaves as Gaussian random variable. In this paper, spatial filtering of individual frames is done in the wavelet domain, and the filtering between the frames is done by recursive temporal ...

Face detection in digital photos aims to get the face area photo. Problems often occur when detecting faces, namely there is a lot of noise so that it affects process. Therefore, this study apply median filtering method improve by reducing be tested. The advantage using filter keep edges smooth while which image quality. ability measured parameters Mean Square Error (MSE) and Peak Noise Signal ...

This paper is concerned with amoeba median filtering, a structure-adaptive morphological image filter. It has been introduced by Lerallut et al. in a discrete formulation. Experimental evidence shows that iterated amoeba median filtering leads to segmentation-like results that are similar to those obtained by self-snakes, an image filter based on a partial differential equation. We investigate ...