Compressing image data consisting of array of individual image points (pixels) involves transmitting additional information whose position values are not in actual data but outside area of array

摘要

The method involves determining a priority value per pixel by computing a difference relative to a previously determined adjacent pixel group, combining the pixel used into a group, sorting by pixel value and storing and/or transmitting groups according to priority. The group position in the array is determined by position values. Additional information is transmitted whose position values are not in the actual data but outside array area. The method involves determining a priority value per pixel by computing a pixel value difference relative to those of a previously determined adjacent pixel group, combining the pixel used into a group, sorting the groups by pixel value and storing and/or transmitting the groups according to priority. The position of the groups in the array is determined by position values and additional information is transmitted whose position values are not in the actual data but outside the area of the array. An independent claim is also included for the following: (a) a method of decompressing image data compressed by the inventive method.