Image compression using polylines

摘要

This paper describes a simple method of image compression based on representing the grey level variations across the rows of an image using polylines. Data compression is achieved because only the x-coordinates (or the difference in x-coordinates) and the grey levels of points at the ends of the line segments that make up the polylines are stored, rather than the grey levels of all the pixels. The operational structure of the method lends itself readily to parallel processing to achieve compression in real time. Experimental results obtained from the analysis of retinal and various other images indicate unnoticeable distortion and a reduction in the amount of image data to be stored by 66% on average.