About moments calculation based on run-length format

The authors propose an extension to the delta method to compute moments up to any order. They also present a novel method, the semi-integral method, as a replacement for the delta method. In this method, the alternative approach arises by considering the image as the sum of segments each with unity height, i.e., a group of lines, and then applying analog integration along the x direction where the mathematical integral formulas are used rather than the delta method summation formulas. Computer simulation for moment calculation with different levels of digitization shows that the method provides better performance than the delta method