Switching median filter for suppressing multi-pixel impulse noise
نویسندگان
چکیده
This paper proposes a new switching median filter for suppressing multi-pixel impulse noise in X-ray images. A is understood as set of several neighboring pixels, the intensity each significantly exceeds background intensity. Multi-pixel can occur, example, due to blooming effect, reason being limited value pixel saturation capacity. article defines thresholds increment relative eight immediate neighbors, above which current processed by filter. The dependence these on number pixels an presented. proposed algorithm based filtering process, consists iterations. In this case, has smallest possible size, minimizes image distortion during processing. particular, exclude single-pixel impulse, processing turned when surge 3.5 with grayscale ranging from 0 1. At same time, nine-pixel impulses, three iterations are required following thresholds: first iteration threshold 2.0; second also 2.0 and third 3.5. was tested real images corrupted noise. not only simple, but reliable suitable real-time implementation application. efficiency technique shown comparison other known methods respect degree suppression. main result testing that method allows excluding Other advantage its weak effect level Gaussian leading absence blurring (or preserving details)
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ژورنال
عنوان ژورنال: Computer Optics
سال: 2021
ISSN: ['2412-6179', '0134-2452']
DOI: https://doi.org/10.18287/2412-6179-co-841