Abstract
Ultrasound or sonographic imaging is a pain-free diagnostic technique that makes use of sound waves to view internal organs of the body. It plays a significant role in diagnostic purposes. The major concern with ultrasound imaging is speckle noise, which severely affects the visual information and automatic analysis of ultrasound images. In this chapter, we propose three hybrid fuzzy filters (HFFs) that integrate a fuzzy filter into a nonlocal means (NLM) filter to reduce speckle noise. We compare the quality of the proposed method with fifteen despeckling filters using both standard test images and echocardiographic images. Given the quantitative assessment and clinical approval, we show that one HFF in particular, HFF3, outperforms other filters in terms of image edge protection and reduction of speckle noise.
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