IEEE Trans Image Process - Viewing-distance aware super-resolution for high-definition display.

Tópicos

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Resumo

In this paper, we propose a novel algorithm for high-definition displays to enlarge low-resolution images while maintaining perceptual constancy (i.e., the same field-of-view, perceptual blur radius, and the retinal image size in viewer's eyes). We model the relationship between a viewer and a display by considering two main aspects of visual perception, i.e., scaling factor and perceptual blur radius. As long as we enlarge an image while adjust its image blur levels on the display, we can maintain viewer's perceptual constancy. We show that the scaling factor should be set in proportion to the viewing distance and the blur levels on the display should be adjusted according to the focal length of a viewer. Toward this, we first refer to edge directions to interpolate a low-resolution image with the increasing of viewing distance and the scaling factor. After images are interpolated, we utilize a local contrast to estimate the spatially varying image blur levels of the interpolated image. We then further adjust the image blur levels using a parametric deblurring method, which combines L1 as well as L2 reconstruction errors, and Tikhonov with total variation regularization terms. By taking these factors into account, high-resolution images adaptive to viewing distance on a display can be generated. Experimental results on both natural image metric and user subjective studies across image scales demonstrate that the proposed super-resolution algorithm for high-definition displays performs favorably against the state-of-the-art methods.

Resumo Limpo

paper propos novel algorithm highdefinit display enlarg lowresolut imag maintain perceptu constanc ie fieldofview perceptu blur radius retin imag size viewer eye model relationship viewer display consid two main aspect visual percept ie scale factor perceptu blur radius long enlarg imag adjust imag blur level display can maintain viewer perceptu constanc show scale factor set proport view distanc blur level display adjust accord focal length viewer toward first refer edg direct interpol lowresolut imag increas view distanc scale factor imag interpol util local contrast estim spatial vari imag blur level interpol imag adjust imag blur level use parametr deblur method combin l well l reconstruct error tikhonov total variat regular term take factor account highresolut imag adapt view distanc display can generat experiment result natur imag metric user subject studi across imag scale demonstr propos superresolut algorithm highdefinit display perform favor stateoftheart method

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