Communications: electrical – Digital comparator systems
Patent
1977-11-08
1980-02-19
Boudreau, Leo H.
Communications: electrical
Digital comparator systems
3401463AC, 358260, G06K 912
Patent
active
041897110
ABSTRACT:
A graphic arts image comprising a plurality of regions, each region having a characteristic multilevel intensity, hue, texture or the like, is sampled and coded using samples along two consecutive scan lines. Individual code words are generated for the beginning, or head, of each run defining the start of a vein or boundary of a region of contiguous like-valued samples along each line and other code words are used for connecting information relating to samples on adjacent lines defining continuations of the boundary for the same region. Other code words identify the characteristic intensity or the like of the region, and a final type of code word identifies the end of the vein. Because the present method and apparatus advantageously codes each internal boundary between adjacent regions only once, an increase of efficiency by a factor approaching two is realized over techniques previously used.
REFERENCES:
patent: 3408485 (1968-10-01), Scott et al.
patent: 3461231 (1969-08-01), Quinlan
patent: 3643019 (1972-02-01), Beltz
patent: 3801737 (1974-04-01), Komura et al.
patent: 3956580 (1976-05-01), Murayama
Huang, "Run-Length Coding and Its Extensions", Picture Bandwidth Compression, 1972, pp. 231-264.
Graham, "Image Transmission by Two-Dimensional Contour Coding", Proc. of IEEE, vol. 55, No. 3, Mar. 1967, pp. 336-345.
Frank, "Partitioning and Coding a Two-Dimensional Field", Proc. of 3rd Int. Conf. on Pattern Rec., Nov. 1976, pp. 816-821.
Grimsdale et al., "System for Automatic Recognition of Patterns", Proc. of IEE, vol. 106, Pt. B, No. 26, Mar. 1959, pp. 210-221.
Elias, "Predictive Coding", IRE Transactions-Information Theory, Mar. 1955, pp. 16-33.
Hoffman, "A Method for the Construction of Minimum Redundancy Codes", Proceedings IRE, Sep. 1952, pp. 1098-1101.
Mit Press, "Transmission of Information", 1961, pp. 75-81.
Tyler, "Two Hardcopy Terminals for PCM Communication . . . . .", Conf. Record 1969 Int. Conf. on Communications, Jun. 1969, pp. 11-21-11-28.
Bell Telephone Laboratories Incorporated
Boudreau Leo H.
Hirsch Alfred E.
Nimtz Robert O.
LandOfFree
Multilevel processing of image signals does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multilevel processing of image signals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multilevel processing of image signals will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-655299