1 : A method for determining vital parameters of a human body by means of a device ( 10 ), in particular a smart device, said method comprising an optical recording ( 11 ) and a computing unit ( 12 ), said method comprising the following steps: recording a sequence of individual image data of limited area of the skin ( 30 ) of the human body by means of the optical recording unit ( 11 ); evaluating the image data, including determining a pulse wave transit time; and determining one or more vital parameter(s) of the human body from the image data by means of the computing unit ( 12 ).