The effect analyze of the CT algorithm based on direct characteristic reconstruction

In the industrial CT detection systems, because of the restrictions of noises such as scattering noise, the traditional methods for CT reconstruction have high noise and low resolution, and cannot detect smaller flaws. So this paper has proposed using the algorithm of characteristic reconstruction to reconstruct the characteristic of object. About this algorithm, relying on the inner structure character of detected object, according to the character of wavelet function before and after RADON transform, the characteristic part of the image is reconstructed by prefiltering the projected data. Then some experiment show that the method can protrude the inner small flaw of detected object with the less sacrifice of the resolution of image background.