This document discusses using mathematical morphology operations like erosion and propagation in combination with JPEG quantization table modification for image steganography. It proposes reducing the size of an encoded image using erosion and propagation to clean up the image while also modifying the JPEG quantization table. The document reviews literature on mathematical morphology, image segmentation techniques, and existing steganographic methods using JPEG and quantization table modification or particle swarm optimization. It outlines the proposed method and provides example results of applying erosion and propagation to reduce the size of an encoded image.