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A novel adaptive switching filter (ASF) based on directional detection is proposed for denoising the images that are highly corrupted by impulse noise. The proposed algorithm employs an efficient noise detection mechanism. It first employs an efficient method to estimate the differences between the current pixel and its neighbors aligned with 28 directions. The current noise pixel is replaced by a median or a mean value within an adaptive filter window with respect to different noise densities. Experimental results show that the proposed approach can not only achieve very low miss-detection ratio and false-alarm ratio even up to high noise corruption, but also preserve the detailed information of an image very well. 相似文献
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今天,移动电子设备制造商正面临着一系列的竞争和挑战。为了继续生存,他们必须提供具有更多功能和更高性能的设备,为此必须降低功耗、尺寸和成本。 相似文献
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