Spiral image compression by an unrestricted chain coding method

This paper presents a method of compressing and restructuring an image based on a single, major feature found in the image, for example, the outline of the skull in a scene that represents a cross-section of a human head. It is a second generation method that is not based on exploiting aspects of the human visual system, but instead the restructuring of the source file in a more compact form without loss. The image domain for the evaluation of the technique is that of medical images recorded in a raster array format by a magnetic resonance scanner. An initial contour for the spiral is based on the outline derived from the image´s major feature. The rest of the contours are created from this initial contour with a radius one pixel less than the most recent contour