Method for obtaining a spatial pattern of an anatomical structure of a subject, comprising the steps of: a) acquiring, from at least one digital image capturing device, at least one uncalibrated image of a calibration reference (CRef) applied on a surface configured to receive the subject in standing position thereon, said calibration reference (CRef) having at least one known dimension and defining at least one known direction; b) defining an absolute calibrated reference system of coordinates (x, y, z) based on the calibration reference (CRef) depicted in said at least one uncalibrated image; and c) acquiring, from said at least one digital image capturing device, at least a first and at least a second calibrated image of a plurality of markers applied on a corresponding plurality of body landmarks of the anatomical structure of the subject at respective contact points with the body landmarks, said plurality of markers being arranged within said absolute calibrated reference system (x, y, z); wherein said at least one uncalibrated image acquired in step a), and said at least a first and said at least a second calibrated image acquired in step c), are captured by the at least one digital image capturing device with the focal axis thereof substantially parallel to said surface configured to receive the subject; wherein said at least a first calibrated image depicts a marker spatial arrangement in a first plane (x, z) and said at least a second calibrated image depicts the marker spatial arrangement in a second plane (y, z) different from the first plane (x, z), the first and second planes (x, z; y, z) being representative of a relative orientation of said plurality of markers with respect to the at least one digital image capturing device; wherein said markers (10, 40) of said plurality of markers each comprise a respective three-dimensional main body shaped as a polyhedron of N faces and having N-1 exposed faces arranged in a known geometric relationship with the contact point of the marker (10, 40) with the respective body landmark; and wherein at least one of said N-1 exposed faces of each marker (10, 40) is identifiable in said at least first and second calibrated images by means of an image recognition algorithm, the method further comprising the step of: d) determining for each marker (10, 40) of said plurality of markers a position (X i, Y i, Z i) of the contact point with the respective body landmark of the subject within said absolute calibrated reference system (x, y, z). a) acquiring, from at least one digital image capturing device, at least one uncalibrated image of a calibration reference (CRef) applied on a surface configured to receive the subject in standing position thereon, said calibration reference (CRef) having at least one known dimension and defining at least one known direction; b) defining an absolute calibrated reference system of coordinates (x, y, z) based on the calibration reference (CRef) depicted in said at least one uncalibrated image; and c) acquiring, from said at least one digital image capturing device, at least a first and at least a second calibrated image of a plurality of markers applied on a corresponding plurality of body landmarks of the anatomical structure of the subject at respective contact points with the body landmarks, said plurality of markers being arranged within said absolute calibrated reference system (x, y, z); wherein said at least one uncalibrated image acquired in step a), and said at least a first and said at least a second calibrated image acquired in step c), are captured by the at least one digital image capturing device with the focal axis thereof substantially parallel to said surface configured to receive the subject; wherein said at least a first calibrated image depicts a marker spatial arrangement in a first plane (x, z) and said at least a second calibrated image depicts the marker spatial arrangement in a second plane (y, z) different from the first plane (x, z), the first and second planes (x, z; y, z) being representative of a relative orientation of said plurality of markers with respect to the at least one digital image capturing device; wherein said markers (10, 40) of said plurality of markers each comprise a respective three-dimensional main body shaped as a polyhedron of N faces and having N-1 exposed faces arranged in a known geometric relationship with the contact point of the marker (10, 40) with the respective body landmark; and wherein at least one of said N-1 exposed faces of each marker (10, 40) is identifiable in said at least first and second calibrated images by means of an image recognition algorithm, the method further comprising the step of: d) determining for each marker (10, 40) of said plurality of markers a position (X i, Y i, Z i) of the contact point with the respective body landmark of the subject within said absolute calibrated reference system (x, y, z).