Edge Preserved De-noising Method using Bilateral Filter for X-ray and GIS Images

摘要

GI/S and Medical X-ray images refer to the images captured by the satellites and specialized electronic devices. GIS images are used to survey and analyze the satellite-range prone regions and extract useful information like two and _three- dimensional characteristics of the Earth's surface, subsurface, atmosphere etc contained in the regions. Medical X-ray images are used to analyze the human internal bone structure for fracture/diseases identification for better diagnosis. However, during the process of acquisition and transmission of these images, noise may be introduced to them or image may be corrupted with noise during acquisition. Due to which the analysis might become tedious. Thus any de-noise method should preserve the edges while de- noising. This paper proposes an ideal method using a NeighShrink SURE based de- noising algorithm and a bilateral filter with the primary aim to preserve the edge information. The proposed algorithm is compared with median, visushirnk, normalshrink and bayeshink method and given better results for proposed method with higher SNR and PSNR values. The edge preservation was the main focus in this paper hence the Accuracy and Error Rate are also measured for original edges.