Primos

PRIMOS© is a complete contact less measuring system which allows fast three-dimensional in vivo measurement of the micro topography of human skin based on the technology of active image triangulation. The measurement head consists of a digital micro-mirror device as the projection unit and a CCD-camera as the recording unit. For active image triangulation an intensity encoded point M is projected onto the surface under investigation. Its image on the surface is recorded by the CCD-camera. The point M is a function of parameters like intensity, triangulation angle between projection system and camera and some other inner respectively outer coordinates of the camera and projection plane. The height information of the structured surface is coded in the distorted intensity pattern, which is recorded. The resolution and accuracy depends on the optical and topographical characteristics of the measured surface and on the noise characteristics of the measurement system.

For accurate in vivo measurements of human skin, depending on the measured part of the human body (inner forearm, forehead, eye zone), different parameters of effective wavelength and amplification factor should be used.
To regard the differences of human skin and avoid undesired distortions by movements, three different measurement methods can be used.
Micro topography and macro topography of the human skin can be divided by using mathematical filters provided by the evaluation software.

Now a new method has been developed, enabling identification and readjustment of previously recorded skin areas at video rate. The technique is based upon algorithms that have been optimized to realize real-time processing of the CCD camera images recorded in the first and second measurement using a standard PC. Identification and readjustment are executed in two steps. First visual positioning is done by means of the video image display and secondly, the fine adjustment is carried automatically before the measuring results are saved.

Example of the Reduction of Depth of Wrinkles

Example of the Change of Roughness Parameters during Treatment

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