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.