The image processing method according to the present invention includes a step of receiving a deformation state image visually indicating a displacement amount or a deformation state distribution field at a plurality of point positions in the target object according to a pressure change in the target object ( 100), a step of dividing the deformation state image into segments (200), a step of defining a lattice point arrangement structure representing the deformation state image (300), and a node “i” in the lattice point arrangement structure. In contrast, an unknown node variable pair representing the elasticity characteristic of the target object is assigned to one or more nodes that are localized on the boundary line between two or more constituent materials constituting the target object. A step of performing (400), a step of calculating a component matrix for each of the component cells in the lattice arrangement structure (500), and obtaining one matrix describing the entire structure Includes a step of combining a plurality of constituent element matrix (600), a step (700) for calculating an image from the matrix of the overall structure representing the elastic modulus distribution of the object. [Selection] Figure 2
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