Telecommunications and Radio Engineering · 2008 · 12 citations · 0 references
ArtsVision ScienceBiomedical ImagingComputer VisionDigital ImagingDigital Image ProcessingDigital Signal ProcessingImage AnalysisImage FilteringImage ProcessingSignal ProcessingAdditive NoiseColor DenoisingColor Image FilteringColor Image ProcessingDiscrete Fourier TransformImage Signal ProcessingMultiplicative Noise
The performance of vector (3D) filtering of color and multichannel images in discrete cosine transform (DCT) domain is studied. It is shown that the vector filtering offers some advantages compared to the component-wise (2D) filtering. Moreover, it is shown through experiments that the DCT based processing can be more efficient than advanced nonlinear vector filters. As noise models, both additive noise and mixed additive and impulsive noise are used. Finally, the applicability of the DCT based filtering is studied when the noise is multiplicative; and a convenient way to reduce multiplicative noise to additive noise is proposed.