Method and apparatus for improving time variant image details on a raster display

A raster display device for displaying a display image with improved details, comprising:

• (a) an intensity memory having a row and column arrangement for receiving and storing intensity information over each sweep;
• (b) an adaptive mapping process coupled to said intensity memory for receiving and converting said intensity information into present brightness levels from a set of brightness levels wherein said set of brightness levels has less resolution than said intensity information and said adaptive mapping process produces predetermined portions of each of said brightness levels from said set of brightness levels within each of said columns;
• (c) a display memory for storing said present brightness values according to said row and column arrangement;
• and
• (d) a raster display having a matrix of pixels according to said row and column arrangement coupled to said display memory for receiving said brightness values and displaying said display image developed over at least one of said sweeps.