Determination of linear motion point spread function using Hough transform for image restoration

The success of restoring images degraded by motion blur highly depends on precise estimation of parameters such as motion direction and length that were involved in the motion Point Spread Function (PSF). This paper presents a new method for determination of linear motion point spread function for automatic restoration of an image. The method assumes a spatially invariant linear blur over the image. The PSF is determined based on the elongation and the direction of elongation of the edges of the blurred image, found using the Hough transform. The estimated PSF is then deconvolved with the blurred image to get the deblurred image. The method was tested on images with real as well as synthetic motion blurs and satisfactory results were obtained.