In this paper a fast algorithm for removing line scratches in old movies is presented. It is strongly based on exploiting the defect visibility in the image. To this aim the Weber's law can be applied to coefficients of an over-complete wavelet representation of the degraded image. The intensity of the defect, which is represented as a light diffraction effect, is then attenuated in the vertical and approximation sub-bands till the minimum threshold of visibility is reached. The experimental results are very satisfying: the image is completely recovered without local artefacts or annoying smoothing effects.
Fast Removal of Line Scratches in Old Movies / Bruni, Vittoria; Kokaram, A; Vitulano, D.. - 4:(2004), pp. 827-830. (Intervento presentato al convegno ICPR 2004 tenutosi a CAMBRIDGE (UK) nel AUGUST 2004) [10.1109/ICPR.2004.1333900].
Fast Removal of Line Scratches in Old Movies
BRUNI, VITTORIA;VITULANO D.
2004
Abstract
In this paper a fast algorithm for removing line scratches in old movies is presented. It is strongly based on exploiting the defect visibility in the image. To this aim the Weber's law can be applied to coefficients of an over-complete wavelet representation of the degraded image. The intensity of the defect, which is represented as a light diffraction effect, is then attenuated in the vertical and approximation sub-bands till the minimum threshold of visibility is reached. The experimental results are very satisfying: the image is completely recovered without local artefacts or annoying smoothing effects.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.