are inherently more resistant to impulse noise than single carrier systems, impulse noise can still be a significant problem in many applications including digital television. A number of impulse noise mitigation algorithms are investigated. These use non linear processing on the digital input signals to limit the size of impulses reaching the demodulator. It is shown that when the noise at the...

A new impulse detection and filtering algorithm is proposed for restoration of images that are highly corrupted by impulse noise. It is based on the average absolute value of four convolutions obtained by one-dimensional Laplacian operators. The proposed algorithm can effectively remove the impulse noise with a wide range of noise density and produce better results in terms of the qualitative a...

This paper describes the noise reduction performance of a switching vector median filter with a random-valued impulse noise detector for color images. As a random-valued impulse noise detector, a minimum spanning tree (MST)-based method is employed. In the switching vector median filter, the impulse noise detector is employed before filtering, and the detection result is used to judge whether a...

This paper focuses on three-dimensional (3-D) adaptive median filters based on the impulse detection approach designed to effectively remove the impulse noise from cardiographic image sequences. Impulse noise affects the useful information in the form of bit errors and it introduces to the image high frequency changes that prohibit to process and to evaluate the heart dynamics correctly. Theref...