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<p>This article describes new methods for improved prototyping and transformation of skin textures including wrinkles and stubble. The authors use a wavelet transform to capture the textural detail in different facial regions at multiple spatial scales and orientations. They then amplify or smooth an image's edges appropriately when constructing a prototype or transformed face image. The authors validate the new methods using perceptual ratings of prototype faces and age-transformed faces.</p>

B. Tiddeman, M. Burt and D. Perrett, "Prototyping and Transforming Facial Textures for Perception Research," in IEEE Computer Graphics and Applications, vol. 21, no. , pp. 42-50, 2001.
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