Blur estimation for document images
Seyfollah Soleimani, Filip Rooms, Wilfried R. Philips · Ghent University Academic Bibliography (Ghent University) · 2009
In this paper, we propose a new measure for estimating defocus blur in document images and compare it with a good existing method proposed in [1].This new measure is the average value of blur levels of edge points detected by the method proposed in [2].This method uses three edge models (transition, peak and line) and analytically calculates their maxima functions.Then maxima functions of the input image are calculated at possible edge locations.By comparing maxima function with the models, the type of the edge and then the blur level can be estimated.We apply this measure to some document images and compare it with the measure of [1].