Method of pixel to vector conversion in an automatic picture cod

Details Method of pixel to vector conversion in an automatic picture cod Method of pixel to vector conversion in an automatic picture cod

1984-06-25

1988-10-11

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 56, G06K 948

Patent

active

047776510

ABSTRACT:
An automatic picture coding system including a method for converting a bit-map image of the picture to vectors as the picture is being scanned. The bit map is delayed as it is being generated to form a series of tessellations or windows of data. The windows are propagated through a series of neighborhood-logic elements which perform data transformation operations such as growing, smoothing and thinning of the bit-map image. A bit stream output from the neighborhood logic which output includes only line and edge features of the original picture is transferred serially to a microcomputer where the features are partitioned into a plurality of line segments. Each line segment is chain coded and temporarily stored, as it is acquired, in a corresponding one of a plurality of lists, the lists being linked in an order corresponding with the order in which the segments are acquired. When the storage of each chain-coded segment is completed, the segment is converted to vectors and transmitted to a user device for display, storage, or further processing, the lists in which the converted segments were stored being unlinked and deallocated. The process is continued until the entire document has been scanned and converted to vectorial data.

REFERENCES:
patent: 4020463 (1977-04-01), Himmel
patent: 4103287 (1978-07-01), Frank
patent: 4493105 (1985-01-01), Beall et al.
patent: 4566128 (1986-01-01), Araki
patent: 4630306 (1986-12-01), West et al.

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