A New Measure for the Eeect of Sharpening and Smoothing Lters on Images
نویسندگان
چکیده
It is well-known that the mean squared error (MSE) is an inappropriate measure for the di erence between two images in many applications. For one such an application, edge-preserving smoothing, an alternative was developed which takes both goals into account: the preservation or sharpening of edges and the smoothing of regions. In this paper, tests on human subjects are reported which con rm that the new measures conform reasonably to visual judgement. Next to this, preliminary results are given from experiments in which the preference for sharpening and smoothing is investigated. It is found that images with a relatively low smoothing and a high sharpening are preferred.
منابع مشابه
A quantitative measure for the perception of sharpening and smoothing in images
It is well-known that the mean squared error (MSE) is an inappropriate measure for the difference between two images in many applications. For one such an application, edge-preserving smoothing, an alternative was developed which takes both goals into account: the preservation or sharpening of edges and the smoothing of regions. In this paper, tests on human subjects are reported which con rm t...
متن کاملA New Contrast Enhancement Lter for Automatic Image Evaluation
We discuss several lters for their ability to both smoothen and enhance contrasts for an automatic evaluation of images. It turns out that lters that work well for the human sensation will not help for automatic image evaluation. Therefore we introduce a new lter, combining methods of nearest-neighbor and contrast enhancement techniques. Introduction Filters may both be used to repair pixel fau...
متن کاملExtended Permutation Filters and Their Applicationto Edge
Extended permutation (EP) lters are deened and analyzed in this paper. In particular, we focus on extended permutation rank selection (EPRS) lters. These lters are constrained to output an order statistic from an extended observation vector. This extended vector includes N observation samples and K statistics that are functions of the observation samples. The rank permutations from selected sam...
متن کاملMultiscale Sharpening and Smoothing in Besov Spaces with Applications to Image Enhancement
In this paper we use multiscale characteristics of wavelet decompositions and their relationship to smoothness spaces such as Besov spaces to derive a framework for smoothing and sharpening of signals and images. As a result, we derive a multiscale generalization of traditional techniques, such as unsharp masking, while using the smoothness parameter α in the Besov space Bα q (L p) to provide a...
متن کاملPAIRED ANISOTROPIC DISTRIBUTION FOR IMAGE SELECTIVE SMOOTHING
In this paper, we present a novel approach for image selective smoothing by the evolution of two paired nonlinear partial differential equations. The distribution coefficient in de-noising equation controls the speed of distribution, and is determined by the edge-strength function. In the previous works, the edge-strength function depends on isotropic smoothing of the image...
متن کامل