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We propose a quantitative method to evaluate the ability of adaptive image filters for reducing noise to low-contrast objects in Multi-Detector Row Computed Tomography (MDCT). The digital phantom for evaluating the ability of a nonlinear noise reduction filter to a low-contrast object in a MDCT image was produced. The digital phantom consists of a water phantom image of MDCT and a bar pattern with...
In this paper, a new multiresolution created from multi-level of barycenter contour is proposed in order to reduce the moderate amount of noise and to improve the retrieval efficiency of the recognition task in computer vision. Then, the triangle area representation with two points (TAR-2p) signature at each level of barycenter contour is introduced as the shape representation. Finally, the normalized...
This paper proposes a new method to remove ringing artifacts without blurring textures. The method uses LSF (line spread function), color similarity and perceptual similarity to detect coding artifacts in decoded images. Blocks are roughly classified into different types by using LSF values. Perceptual similarities among classified blocks are measured with rules that simulate human visual experience...
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