公开(公告)号：GB2354679A

公开(公告)日：2001-03-28

申请号：GB9917455

申请日：1999-07-26

Applicant: IBM

Inventor： TURACCIO PIERMARIO ,  ALIFFI SALVO ,  PERRONE ANTONIO

IPC: G06F3/14 ,  G09G5/02 ,  H04N1/41

Abstract: A method to reduce the number of bits to display a pixel colour, initially represented by a three colour model (e.g. RGB octets). The method comprises reducing the bit pattern of the colour to a lower (e.g. four bit) pattern by (a) analysing the first bit, or first few bits, of each of the three bit patterns, to determine tone, (b) assigning a value to the first bit of the reduced (four) bit pattern, based on the determined tone and (c) assigning the remaining (e.g three) bits of the reduced bit pattern using a predetermined bit (e.g. the second bit) from each of the three original bit patterns. The method has particular application to remote control of computer systems, where a terminal such as 105 is used to control another terminal, 103; the speed/processing complexity of the remote control can be greatly reduced if terminal 105 displays a lower resolution version of that shown on terminal 103.

公开(公告)号：GB2354679B

公开(公告)日：2003-08-27

申请号：GB9917455

申请日：1999-07-26

Applicant: IBM

Inventor： TURACCIO PIERMARIO ,  ALIFFI SALVO ,  PERRONE ANTONIO

IPC: G06F3/14 ,  G09G5/02 ,  H04N1/41

Abstract: A method and a system for a fast and reliable color reduction from multiple bit color representations to 4 bit color representations. The method for color reduction in a computer system having a three color model for color representation of a pixel, each color being represented by a multiple bit pattern, reduces the color to a four bit value by analysing the first bit of each of said three multiple bit patterns to determine tone; assigning a value to the first bit of said four bit value, based on said determined tone; and assigning the remaining three bits of said four bit value by utilising one pre-determined bit from each of said three multiple bit patterns.