1. A system for deblurring a motion blurred image of a video stream, the system comprising: an image capturing unit operable to capture a video stream of a moving object; a display screen operable to display the video stream; and an image processing unit, comprising: a blurred image selecting module operable to select a blurred image from the video stream, and select a plurality of blurred pixels from the blurred image; a function generating module operable to calculate a movement offset for each of the blurred pixels according to coordinates of the blurred pixel in a frequency domain during the movement of the moving object, and generate a point spread function (PSF) according to the movement offset; and an image converting module operable to generate an image conversion formula according to the point spread function, convert each of the blurred pixels into a sharp pixel according to the image conversion formula, generate a sharp image based on all of the sharp pixels, and display the sharp image on the display screen.