A New Method Which Based on Threshold Segmentation for Correcting Ring Artifacts in CT Image
Shu Yang · Hedianzixue yu tance jishu · 2014
Polar coordinate transformation method and its derivative algorithm are a common method of ring artifact reduction. Although the effect of this method is good and fast,but the disadvantage is equally obvious: the processed image will appear obvious blurring,especially in the fringe of the image. The paper presents an adaptive segmentation method which based on the polar coordinates transformation method. The experiment proved that this method can provide a better processed image,which has a clearer fringe. The method will also automatically skip the area without valid data to reduce the amount of computer's calculation,so as to speed up the image processing speed.