IJIGSP Vol. 10, No. 7, 8 Jul. 2018
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Mining winkle, Age-group Classification, (LEPP), Aging-cue, Wrinkle-patterns, Noise, (ADIENCE), (GALLAGHER), (FACES)
Human age recognition from face image relies highly on a reasonable aging description. Considering the disparate and complex face-aging variation of each person, aging description needs to be defined carefully with detailed local information. However, aging description relies highly on the appropriate definition of different aging-affiliated textures. Wrinkles are considered as the most discernible textures in this regard owing to their significant visual appearance in human aging. Most of the existing image-descriptors, however, fail short to preserve diverse variations of wrinkles, such as a) characterizing stronger and smoother wrinkles, appropriately, b) distinguishing wrinkles from non-wrinkle patterns, and c) characterizing the proper texture-structures of the pixels belonging to the same wrinkle. In this paper, we address these issues by presenting a new local descriptor, Local Edge-Prototypic Pattern (LEPP) with the notion that LEPP preserves different variations of wrinkle-patterns appropriately in representing the aging description. In the coding, LEPP sets prototypic restrictions for each neighboring pixel using their relation with center pixel when they belong to an inlying-edge, and utilize such restrictions, afterwards, to prioritize specific neighbors showing significant edge-signature. This strategy appropriately encodes the inlying edge structure of aging-affiliated textures and simultaneously, avoids featureless texture. We visualize the stability of LEPP in terms of its robustness under noise. Our experiments show that LEPP preserves discernible aging variations yielding better accuracies than the state-of-the-art methods in popular age-group datasets.
Md Tauhid Bin Iqbal, Oksam Chae, " Mining Wrinkle-Patterns with Local Edge-Prototypic Pattern (LEPP) Descriptor for the Recognition of Human Age-groups ", International Journal of Image, Graphics and Signal Processing(IJIGSP), Vol.10, No.7, pp. 1-10, 2018. DOI: 10.5815/ijigsp.2018.07.01
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