Efficient implementation of Itoh's algorithm in 3D shape measurement using digital fringe projection technique

Phase unwrapping is one of the challenging tasks in 3D shape measurement. Phase unwrapping is the computational intensive process which involves adding or subtracting multiples of 2π. In this paper the basic implementation of Itoh's algorithm[1] is shown which involves a lot of computations and unnecessary iterations to solve the phase unwrapping problem. To reduce the number of computations and iterations we have derived another implementation for Itoh's algorithm. In this implementation computational complexity has been reduced and is directly proportional to the number of pixels traversed.