A new method of diffusion filtering for flash X-ray radiographic CCD image

In order to improve CCD images received from the flash X-ray radiography, a new method called intelligent median-nonlinear diffusion filtering (IMNDF) were proposed based on nonlinear Partial Differential Equation (PDE). This method takes the advantage of both the intelligent median filter and the nonlinear diffusion filter. The numerical results show that the proposed method can eliminate the combination of Gaussian noise and impulse noise efficiently with edge-preserving. The PSNR (promotion of signal-to-noise ratio) of the new method is 3~5 times larger than that of the traditional methods. Well denoised results were obtained for flash X-ray radiographic CCD images.