![]() Alley asserts that attributes derived from human facial appearance like mood and perceived age significantly impact interpersonal behavior as is considered as essential contextual cue in social networks. The human face provides prior perceptible information about one’s age, gender, identity, ethnicity, and mood. Therefore, these age-introduced variations could be learned and used to estimate facial age. A face seen at one age is totally different from the face of same individual at a different age. Aging involves both variations in soft tissues and bony structure on the human face. Aging is an inevitable stochastic process that affects facial appearance. Another factor that constantly and permanently causes variations in facial appearance is age. For instance, a face seen in blue light illumination is totally different from one seen under red light illumination. These factors cause variations in face appearance. Major factors that influence facial aging include gravity, exposure to ultraviolet (UV) rays from the sun, maturity of soft tissues, bone re-structuring, and facial muscular activities. This statement is true because facial appearance varies more dynamically as it is affected by several factors including pose, facial expression, head profile, illumination, aging, occlusion, mustache, beards, makeup (cosmetics), and hair style. ![]()
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