Browsing by Author "Engelbrecht, Jan-At"

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    Image deblurring and blur kernel estimation of motion blurred colour photographs
    (Stellenbosch : Stellenbosch University, 2016-02-23) Engelbrecht, Jan-At; Maritz, Milton Frick; Stellenbosch University. Faculty of Science. Department Mathematical Sciences. Applied Mathematics
    ENGLISH ABSTRACT : Blurred images can be restored using known deconvolution methods. Image blur can be caused by various factors during the image acquisition phase, such as camera defocus or motion. The restoration of blurred images is further complicated by the addition of possible electronic noise. In this report we propose a direct method where the kernel is estimated by nding possible edges in the blurred image using edge detection. A sinogram of the blur kernel is obtained by sampling and then di erentiating across edges in the image for a su cient number of edge orientations. This sinogram is then improved by making use of a sinogram interpolation technique. The application of the inverse Radon transform then yields the kernel which is used to restore the image.