Patent ID: 6922251

Claim:
A Method for the identification and determination of the position of an object, in particular a metallurgical vessel, in particular to measure its refractory lining, by means of electromagnetic radiation comprising: defining an operator with respect to a two-dimensional or three-dimensional structure of known shape and size; determining distance values (Rad(m,n)) and associated measuring angles (φ(m), Θ(n)) in the region of the structure; scaling the operator using measured distance value (Rad(m,n)) and the associated measuring angles (φ(m), Θ(n)) in a pixel coordinate system, wherein the operators extent (imax, jmax) and resolution (Δi, Δj) in the pixel coordinate system (i:[−imax,imax, Δi], j:[−jmax,jmax, Δj]) and the expected values of the operator (R(m+i,n+j)) are converted to measured polar coordinates (Rad(m,n), φ(m), Θ(n)); calculating a result value (S(m,n)) from the differences between the expected values of the operator (R(m+i,n+j)) and the measured values (R(m+i,n+j)); and determining the location of the structure to be found from the position of the minimum result value.