Research on the motion-blurred direction by spectrum image analysis

According to the characters of the motion-blurred images, this paper analyzes its degradation model and gives a method of estimating the direction of motion-blur more accurately which based on spectrum image. First of all, it is necessary to figure out the relationship of the spectrum image´s stripe and the blurred direction on the basis of degradation model; after that, we need to pretreat the spectrum image (spectrum image block, contrast-limited adaptive gray stretching, and by finding the appropriate binarization threshold value of spectrum after inverting with Otsu method); finally, by Radon transform we could obtain the perpendicular direction of dark stripes, and then the blurred direction is calculated. This method is demonstrated precisely by experimental results.