Text recovery in colour compressed video.

摘要

A method for colour conversion comprising the steps of converting an n-bit original colour data supplied for each pixel to an m-bit (n>m) new colour data; comparing the new colour data with each other and the original colour data with each other with respect to a current pixel and a previous pixel which is a pixel immediately preceding the current pixel; and changing the value of the new colour data and sending it to a display unit when a match of the new colour data and a mismatch of the orignal colour data are detected by said comparison. This method therefore enables a colour data conversion characterised in that a change in the original colour can be recognised on a display screen.