METHOD AND COMPUTER PROGRAM PRODUCT FOR DETERMINING A POSE OF A BODY MODEL IN 3D SPACE

A computer implemented method for determining a pose of a body model in 3D space from a 2D input includes acquiring an input graph representation of a body model in 2D space, the input graph representation comprising a plurality of joints with associated joint positions and interconnections between the joints, and processing the input graph representation with a sequential Mobius graph convolution, MGC, chain comprising one or more MGC blocks. Each MGC block determines a set of graph signals from its respective block input and applies a weight matrix and a graph filter on the set of graph signals, wherein the graph filter is based on a Mobius parameter set and is applied in a spectral graph convolutional network. The block input is the input graph representation in 2D space if the MGC block is a first MGC block of the sequential MGC chain, or else is an output graph representation of a preceding MGC block of the sequential MGC chain. A last MGC block of the sequential MGC chain provides the output graph representation of the body model in 3D space as an output.