Run length encoding method and system

Details Run length encoding method and system Run length encoding method and system

1990-12-11

1994-04-19

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358426, H04N 141

Patent

active

053051114

ABSTRACT:
A run length encoder for converting bi-level video image data made up of white and black representative pixel values to a run length code to be used by a vector processor including a transition detector for detecting the transition of inputted image data values from either white to black or black to white. The inputted image data are addressed along each scanned line. At every white to black transition, the pixel address is stored in memory. The number of continuous black pixels following this first transition is counted until a black to white transition is detected. The resulting count value corresponding to each stored address value for each black "run" is also stored in memory, wherein these stored values represent the run length code of the video image data for use with the vector processor.

REFERENCES:
patent: 4097903 (1978-06-01), Nakagome et al.
patent: 4307377 (1981-12-01), Pferd et al.
patent: 4360840 (1982-11-01), Wolfrum et al.
patent: 4682215 (1987-07-01), Adachi
patent: 4701803 (1987-10-01), Sato
patent: 4799110 (1989-01-01), Hisada et al.

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