System for the removal of impulsive noise in image sequences

Anil Christopher Kokaram; Peter J. W. Rayner

doi:10.1117/12.131449

1 November 1992 System for the removal of impulsive noise in image sequences

Anil Christopher Kokaram, Peter J. W. Rayner

Proceedings Volume 1818, Visual Communications and Image Processing '92; (1992) https://doi.org/10.1117/12.131449
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States

Abstract

This paper presents a system for the restoration of image sequences that are degraded by impulsive noise such as scratches or dropouts. The proposed system uses a multilevel block matching algorithm to estimate the motion between frames and considers the use of an impulsive noise detector to improve the quality of restoration as compared to a global median operation. The detector considers the temporal continuity of motion compensated image information and makes a decision as to whether a suspected discontinuity is due to an impulsive distortion or occlusion in the sequence. When a corrupted portion of the image is detected a motion compensated median filter is used to remove the distortion. The paper introduces an extended multistage filter for image sequence processing. It is found that the use of the detector cannot adversely affect the filtered image when compared to the globally filtered image, and the detail preservation is generally better. The speed of processing is also increased since the number of median filtering operations is considerably reduced.

Citation Download Citation

Anil Christopher Kokaram and Peter J. W. Rayner "System for the removal of impulsive noise in image sequences", Proc. SPIE 1818, Visual Communications and Image Processing '92, (1 November 1992); https://doi.org/10.1117/12.131449

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