Positive–negative impulse noise removal based on row and column filtering

In the field of photo-electronic imaging, impulse noise seriously affects the image quality. In order to remove it, a new positive–negative impulse denoise filter based on the row and column filtering (PN-RCF) is proposed and its performance of noise removal and detail protection is analyzed. Compared with other nonlinear filters through the simulations, the given filter not only can suppress the positive–negative impulse noise, but also can protect the edges and detail well with simple row and column processing.