Estimating a surface area and/or volume of a body or a body part of a subject

According to an aspect, there is provided a computer-implemented method for estimating a surface area and/or a volume of a body or a body part of a subject. The method comprises obtaining at least one image, wherein the at least one image includes a face of the subject; processing the at least one image to determine values for one or more facial image parameters for the face of the subject; determining values for one or more characteristics of the subject, wherein the one or more characteristics comprises one or more of age of the subject, weight of the subject, height of the subject and gender of the subject; using a facial parametric model and the determined values for the one or more facial image parameters to determine values for one or more facial shape parameters for the face of the subject, wherein the facial parametric model relates specific values for one or more facial image parameters to a respective 3D representation of a face having respective values for the one or more facial shape parameters; using a prediction model with the determined values for the one or more characteristics and the determined values of the one or more facial shape parameters to predict a 3D representation of the full body of the subject; and analyzing the predicted 3D representation of the full body of the subject to estimate the surface area and/or the volume of the body or body part of the subject. A corresponding apparatus and computer program product is also provided.</p

Long distance measurement with sub-micrometer accuracy using a frequency comb laser

\u3cp\u3eThe invention of the femtosecond frequency comb (FC) laser has revolutionized the field of high-resolution spectroscopy, by providing very accurate reference frequencies in the optical domain, acting as a frequency ruler. Similarly, a frequency comb can be viewed as a ruler for distance measurement, which is based on the fact that the vacuum distance between subsequent pulses is known with the accuracy of the used time standard. We have recently demonstrated absolute distance measurements using a FC laser applying a cross-correlation technique [1], which was supported by a theoretical and a numerical study on the formation of cross-correlation in dispersive media [2,3].\u3c/p\u3

Stationary phase based asymptotic analysis of inter-pulse interference from a frequency comb source in dispersive media

\u3cp\u3eWe introduce a continuous model to study interpulse interference from a femtosecond frequency comb laser in dispersive media. We extend this model to pulse propagation for longer distances in dispersive media and compare the results to measurements for up to 200 m in air.\u3c/p\u3

Stationary phase based asymptotic analysis of inter-pulse interference from a frequency comb source in dispersive media

We introduce a continuous model to study interpulse interference from a femtosecond frequency comb laser in dispersive media. We extend this model to pulse propagation for longer distances in dispersive media and compare the results to measurements for up to 200 m in air