2-DIMENSIONAL DESMEARING OF CENTROSYMMETRIC SMALL-ANGLE X-RAY-SCATTERING DIFFRACTION PATTERNS

Owing to the high dynamic range and resolution of image plates, digiti zation of the direct-beam profile as well as of two-dimensional small- angle X-ray scattering patterns gives data with enough accuracy to all ow desmearing of two-dimensional patterns after corrections of geometr ical distortions. A radial conversion of the images is used to compres s the images and to isolate a small area of interest. The results obta ined by the Wiener filtering method and the iterative method of Van Ci ttert on simulated patterns are compared.