Over the last 4 decades many new methods and instruments for objective assessment of the skin have been brought to the market. In an attempt to categorize, one can identify these developments as single-point methods, 2D imaging methods (top view or cross-sectional) and, more recently, full 3D imaging methods. Some methods further allow for investigation of dynamic changes in skin parameters with the use of both time plot graphs and real time or compressed time scale video-clips. Most methods are non-invasive in nature and incorporate both contact and non-contact measurement technologies.
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