| Firstly, based on the theory of X -ray radiography, in this paper, the system of Computed X -ray Radiography (CR) is introduced, the factors influencing the image quality of X -ray radiography are analyzed, and the degrading of X -ray digital image is analyzed. Then, the factors degrading image quality of X -ray digital image are studied systemically, the method of image enhancing and image restoration is applied to degraded X -ray digital image. In image enhancing, image's noise smoothing, edge enhancing and contrast enhancing are studied and a combined method of image enhancing for degraded X -ray digital image is given through the combination of these studies in this paper. In image restoration, in this paper, the degenerate factors of X -ray digital image are analyzed, mathematical model of image degeneration, the processing of morbidity and legitimacy, the theory, method and application of X -ray digital image's restoration are studied, also the method of modified Wiener filter and the combined method for degenerate X -ray digital image are given. |
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