A parallel algorithm is proposed for fast image labeling on mesh-connected computers using only local operators on image pixels. The algorithm requires O(kn1/k) bits of memory per processor and takes O(kn) time, for any integer k in the range [1, log n]. Bit-serial communication can be used among processors without affecting the asymptotic time complexity of the algorithm. The algorithm has a very small constant factor for the computation time, which makes it superior to previous mesh-computer labeling algorithms for most practical image sizes (e.g., up to 4096 × 4096 images). The algorithm is based on the use of stacks, which can be easily realized by using very fast shift registers within each PE. When k is a constant, the algorithm takes O(n) time and uses Θ(n1/k) bits of memory per processor, which is quite small for most practical applications.
|Number of pages||8|
|Journal||Proceedings of the International Conference on Parallel Processing|
|Publication status||Published - 1 Dec 1989|
ASJC Scopus subject areas
- Hardware and Architecture