Method and apparatus for converting gray scale

Details Method and apparatus for converting gray scale Method and apparatus for converting gray scale

1989-09-22

1992-10-13

Harkcom, Gary V.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340704, 340703, 395132, G09G 510, G06F 314

Patent

active

051554780

ABSTRACT:
A system for converting selected M gray levels in a K-gray scale to M identifiable levels in an N-gray scale, where K>N.gtoreq.M. A first table is created in which the respective M gray levels of the K-gray scale are mapped to different levels in the N-gray scale, which levels have the relative order and magnitude of their brightnesses in the K-gray scale, and using this first table, a second table is created in which the M gray levels in the N-gray scale are mapped to their corresponding M gray levels in the K-gray scale on a one-to-one basis according to the first table. Using the second table, any M gray levels in a K-gray scale can easily be converted to ones in an N-gray scale on a one-to-one basis with the relative order and magnitude of the brightnesses of those M gray levels being maintained.

REFERENCES:
patent: 4755954 (1988-07-01), Netter
patent: 4763283 (1988-08-01), Coutrot
patent: 4977398 (1990-12-01), Pleva et al.
patent: 5003299 (1991-03-01), Batson et al.
patent: 5059962 (1991-10-01), Sekiya et al.

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