公开(公告)号：CA1304812C

公开(公告)日：1992-07-07

申请号：CA478625

申请日：1985-04-09

Applicant: IBM

Inventor： ANDERSON KAREN L ,  MITCHELL JOAN L V ,  PENNEBAKER WILLIAM B ,  GOERTZEL GERALD

IPC: G06F3/153 ,  G06T9/00 ,  H03M7/46 ,  H04N1/41 ,  H04N1/419 ,  H04N7/12

Abstract: A method for converting an image from a bit map to a run end or run length representation includes the steps of : storing the image as a bit map representation; accessing for each byte in an image by a look-up table a selected routine, corresponding to such byte, from a number of routines for converting bit strings to run representations, wherein the look-up table accessed is selected in accordance with a color value of a preceding pixel binary bit; and executing the selected routine on the current byte to convert the bit string to a run representation; storing in a run representation buffer, as a count value, each run representation; repeating the above steps of accessing and executing for each byte and storing for each run of continuous color to the end of the image. Y0984-032