IEEE Trans Image Process - High dynamic range image display with halo and clipping prevention.

Tópicos

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Resumo

The dynamic range of an image is defined as the ratio between the highest and the lowest luminance level. In a high dynamic range (HDR) image, this value exceeds the capabilities of conventional display devices; as a consequence, dedicated visualization techniques are required. In particular, it is possible to process an HDR image in order to reduce its dynamic range without producing a significant change in the visual sensation experienced by the observer. In this paper, we propose a dynamic range reduction algorithm that produces high-quality results with a low computational cost and a limited number of parameters. The algorithm belongs to the category of methods based upon the Retinex theory of vision and was specifically designed in order to prevent the formation of common artifacts, such as halos around the sharp edges and clipping of the highlights, that often affect methods of this kind. After a detailed analysis of the state of the art, we shall describe the method and compare the results and performance with those of two techniques recently proposed in the literature and one commercial software.

Resumo Limpo

dynam rang imag defin ratio highest lowest lumin level high dynam rang hdr imag valu exceed capabl convent display devic consequ dedic visual techniqu requir particular possibl process hdr imag order reduc dynam rang without produc signific chang visual sensat experienc observ paper propos dynam rang reduct algorithm produc highqual result low comput cost limit number paramet algorithm belong categori method base upon retinex theori vision specif design order prevent format common artifact halo around sharp edg clip highlight often affect method kind detail analysi state art shall describ method compar result perform two techniqu recent propos literatur one commerci softwar

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