Scanning text image radial calibration technology research

The text image acquisition has become increasingly popular. However, the quality of the image is difficult to guarantee. May be due to various reasons resulting in various distortion to seriously influence our reading and further image processing. Previous research in this area is mainly focused on tilt correction and perspective correction. In the radial calibration research are relatively few. In this paper, base on research into the shading and noise of the image and tilt correction. Focus on the image distortion correction. Put forward a kind of projection transform based rapid correction algorithm. Experiments show that this method has achieved good effect.