A Digital Vision Chip for Early Feature Extraction with Rotated Template-Matching CA
Masayuki Ikebe, and Tetsuya Asai
Graduate School of Information Science and Technology, Hokkaido University, Kita 14, Nishi 9, Kita-ku, Sapporo 060-0814, Japan
We discuss a cellular-automata (CA) LSI core that extracts early features of objects in images, such as sizes and skeletons. A CMOS-image sensor with a CA core enables high-speed image processing. We propose an efficient CA algorithm based on rotated template matching. Each cell circuit in the proposed CA is implemented by a digital circuit, and transistors in each cell circuit number 198 in full customized design. The CA LSI consists of a large number of cell circuits operating in parallel to ensure fast, efficient object extraction as the number of cells increases. With a 0.25μm CMOS process, the total area of each cell circuit is 30×30μm². Simulation results indicated that image processing with 320×240 cells operates at up to 25MHz.
-  K. Preston, and M. Duff, “Modern cellular automata,” Plenum Press, 1984.
-  T. Toffoli, and N. Margolus, “Cellular automata machines,” MIT Press, 1987.
-  J. Serra, “Image Analysis and Mathematical Morphology,” Academic Press, 1982.
-  H. Harrer, and J. A. Nossek, “Discrete-Time Cellular Neural Networks,” Int. J. Circ. Th. Appl., Vol.20, pp. 453-467, 1992.
-  T. Sunayama, M. Ikebe, T. Asai, and Y. Amemiya, “Cellular νMOS circuits performing edge detection with difference-of-Gaussian Filters,” Japanese Journal of Applied Physics, Vol.39, No.4B, pp. 399-407, 2000.
-  R. Kagaya, M. Ikebe, T. Asai, and Y. Amemiya, “On-chip fixedpattern-noise canceling with non-destructive intermediate readout circuitry for CMOS active-pixel sensors,” WSEAS Transactions on Circuits and Systems, Vol.3, No.3, pp. 477-479, 2004.
-  A. Namiki, T. Komuro, and M. Ishikawa, “High Speed Sensory-Motor Fusion Based on Dynamics Matching,” Proceedings of the IEEE, Vol.90, No.7, pp. 1178-1187, 2002.
-  M. J. E. Golay, “Hexagonal parallel pattern transformations,” IEEE Trans. Comput., Vol.C-18, pp. 733-740, 1969.
-  C. Arcelli, L. Cordella, and S. Levialdi, “Parallel thinning of binary pictures,” Electron. Lett., Vol.11, pp. 148-149, 1975.
-  C. J. Hilditch, “Liner skeletons from square cupboards,” In: B. Melter, D. Michie (editors), “Machine intelligence,” Edinburgh Univ. Press, p. 403, 1969.
-  R. Stefanelli, and A. Rosenfeld, “Some parallel thinning algorithms for digital pictures,” J. ACM, Vol.18, pp. 255-264, 1971.
-  H. Tamura, “General comments on thinning methods,” Proc. Reliability Soc. PRL 75, 1975.
-  G. M. Carter, J. M. Chaiken, and E. Ignall, “Response areas for two emergency units,” Operations Research, Vol.20, pp. 571-594, 1972.
-  F. K. Hwang, “An O(nlogn) algorithm for rectilinear minimal spanningtrees,” Journal of the ACM, Vol.26, pp. 177-182, 1979.
-  D. T. Lee, “Two dimensional Voronoi Diagram in the Lp-metric,”Journal of the ACM, Vol.27, pp. 604-618, 1980.
-  D. T. Lee, and C. K. Wong, “Voronoi Diagram in L1 (L∞) metrics with 2-dimensional storage applications,” SIAM Journal of Computing,Vol.9, pp. 200-211, 1980.
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