Adaptive Median Filter for Flash X-Ray Radiographic CCD Image
Liu Rui-gen · Optics & Optoelectronic Technology · 2008
Median filtering is a non-linear image processing method that can preserve image edge while removing noise.In order to preserve image edge more efficiently while removing the impulse noise in flash X-ray radiographic CCD image,an improved adaptive median filter method is proposed in this paper to avoid the shortcoming of the traditional adaptive median filter.The new method takes the local variation and local median value into account.So,it is a local adaptive median filter.It can get better filtered result not only for salt-pepper noise but also for random impulse noise.The experimental results show that the new method is very efficient to remove the impulse noise.It also can get better result for flash X-ray radiographic CCD image.