PURPOSE: A method of decoding a structured light which is hierarchically orthogonal through a boundary inheritance and a three-dimensional distance image measurement system using the same are provided to reduce three-dimensional distance image generating error by coinciding a boundary point with the boundary point of a higher layer in case a difference between a boundary area and a boundary point exists within a certain range. CONSTITUTION: A three-dimensional image distance measurement system grasps the boundary point(d) of a acknowledged current layer and a time sequential boundary point(D) by an image reception device(st150). The system computes(d-D) value(st155). If the computed value has a value below Δd, the system coincides the boundary point grasped in the image reception device according to a boundary point grasped by time sequence. [Reference numerals] (AA) Start; (BB) End; (st140) Grasping a shadow area in a captured image; (st150) Grasping the boundary(d) and the time sequential boundary(D) of the current layer; (st155) Computing d-D; (st160) Displaying a camera boundary area and a projector boundary area on coordinates; (st170) Matching boundaries; (st180) Grasping the inheritance address of an upper layer; (st190) Adding the address of the current layer to the inheritance address; (st200) Updating the boundary of an image receiving device and the boundary of a projection device to the coordinates
3 MEASURING METHOD OF 3D IMAGE DEPTH AND A SYSTEM FOR MEASURING 3D IMAGE DEPTH USING BOUNDARY INHERITANCE BASED HIERARCHICAL ORTHOGONAL CODING