Binary image filtering under noise distribution constraints

Octavian Valeriu Sarca; Jaakko T. Astola

doi:10.1117/12.235838

25 March 1996 Binary image filtering under noise distribution constraints

Octavian Valeriu Sarca, Jaakko T. Astola

Proceedings Volume 2662, Nonlinear Image Processing VII; (1996) https://doi.org/10.1117/12.235838
Event: Electronic Imaging: Science and Technology, 1996, San Jose, CA, United States

Abstract

The most general filtering methods for binary images are binary increasing or non-increasing filters. The amount of memory used by both methods during training rises exponentially with the window size. Also, both methods need training sets whose size rises exponentially with the number of the window elements. This limits the size of the window to maximum 5 by 5 pixels. In this paper we search for a suboptimal filter which can be implemented for larger window sizes. Applying certain constraints to the noise distribution, the conditional expectation is decomposed into noise dependent and original image dependent components. The resulting filter can be trained with the original image to learn the ideal patterns, while the noise properties can be extracted by both modeling or training on a reasonable training set. The amount of memory used by the new filter is proportional to a finite power of window size. It is shown that the new filter is a generalization of weighted order statistic filter.

Citation Download Citation

Octavian Valeriu Sarca and Jaakko T. Astola "Binary image filtering under noise distribution constraints", Proc. SPIE 2662, Nonlinear Image Processing VII, (25 March 1996); https://doi.org/10.1117/12.235838

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KEYWORDS

Image filtering

Digital filtering

Filtering (signal processing)

Binary data

Image processing

Statistical analysis

Linear filtering

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