This paper pesents the metods of image sharpening. A system of linear equations is formulated from the point spread function which is approximated with Gauss distribution. Unique image can be obtained by this method since the method satisfies both the necessary and sufficint conditions for obtaining solutions. Computer simuations are made to sharpen the image by the Gauss distribution. Using the practical image, the usefulness of the method is verified. The new operation metod of image sharpening is also proposed. The operation method is equivalent to the method of linear equations. There are some merits in processing time and memory capacity.
