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Machine Vision Systems for Inspection and Metrology VII
Median filters and ranked filters of ranks other than median have often been proposed or used to remove image noise as well as for other reasons. These are nonlinear operations, and often have relative long execution times, making them unsatisfactory for many speed-critical industrial applications. This paper builds on the earlier work of Mahmoodi and Waltz 1 to provide efficient implementations of 3x3 ranked filters of ranks 1 (minimum), 2, 3, 4, 5 (median), 6, 7, 8, and 9 (maximum). Thesedoi:10.1117/12.326970 fatcat:hjh6th2fkfa2rh32amnkpisykm