Removal of defects in radiography image

Defects on radiography images limit the measurement accuracy. Based on the character of multiple films of radiography, a method of defects removal was obtained. First,the original images was accurately registered, then an averaged image was obtained by these registered images, the defect image was obtained from the difference of the original image and the averaged image. The defects on the defect image was partitioned and posited by FCM. At last, the original image was restored by the averaged image, the defect images and the classification of defects. The simulative results confirm the method.