IEEE Trans Image Process - Face illumination manipulation using a single reference image by adaptive layer decomposition.

Tópicos

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Resumo

This paper proposes a novel image-based framework to manipulate the illumination of human face through adaptive layer decomposition. According to our framework, only a single reference image, without any knowledge of the 3D geometry or material information of the input face, is needed. To transfer the illumination effects of a reference face image to a normal lighting face, we first decompose the lightness layers of the reference and the input images into large-scale and detail layers through weighted least squares (WLS) filter with adaptive smoothing parameters according to the gradient values of the face images. The large-scale layer of the reference image is filtered with the guidance of the input image by guided filter with adaptive smoothing parameters according to the face structures. The relit result is obtained by replacing the largescale layer of the input image with that of the reference image. To normalize the illumination effects of a non-normal lighting face (i.e., face delighting), we introduce similar reflectance prior to the layer decomposition stage by WLS filter, which make the normalized result less affected by the high contrast light and shadow effects of the input face. Through these two procedures, we can change the illumination effects of a non-normal lighting face by first normalizing the illumination and then transferring the illumination of another reference face to it. We acquire convincing relit results of both face relighting and delighting on numerous input and reference face images with various illumination effects and genders. Comparisons with previous papers show that our framework is less affected by geometry differences and can preserve better the identification structure and skin color of the input face.

Resumo Limpo

paper propos novel imagebas framework manipul illumin human face adapt layer decomposit accord framework singl refer imag without knowledg d geometri materi inform input face need transfer illumin effect refer face imag normal light face first decompos light layer refer input imag largescal detail layer weight least squar wls filter adapt smooth paramet accord gradient valu face imag largescal layer refer imag filter guidanc input imag guid filter adapt smooth paramet accord face structur relit result obtain replac largescal layer input imag refer imag normal illumin effect nonnorm light face ie face delight introduc similar reflect prior layer decomposit stage wls filter make normal result less affect high contrast light shadow effect input face two procedur can chang illumin effect nonnorm light face first normal illumin transfer illumin anoth refer face acquir convinc relit result face relight delight numer input refer face imag various illumin effect gender comparison previous paper show framework less affect geometri differ can preserv better identif structur skin color input face

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