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This noise consequently reduces the contrast of ultrasound images and adversely affects the other medical image processing tasks such as medical image registration, image super-resolution, and image segmentation. Therefore, one of the important objectives of any denoising algorithm is to attenuate the speckle noise effectively and also preserve the significant medical details in the denoised image. The main focus of this paper is the reduction of speckle noise for ultrasound images using various similarity measures in non-local framework. Through exhaustive experiments conducted on real ultrasound images, B-mode and simulated synthetic images demonstrate that, the Square chord and Chi-square distance-based similarity measures are the most effective similarity measure used in non-local framework for denoising of ultrasound images.<\/jats:p>","DOI":"10.3233\/jifs-182632","type":"journal-article","created":{"date-parts":[[2019,8,2]],"date-time":"2019-08-02T12:17:48Z","timestamp":1564748268000},"page":"2351-2366","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":3,"title":["Efficient and robust similarity measure for denoising ultrasound images in non-local framework"],"prefix":"10.1177","volume":"37","author":[{"given":"Saurabh","family":"Khare","sequence":"first","affiliation":[{"name":"Department of Computer Science and Engineering, Maulana Azad National Institute of Technology (MANIT), Bhopal, Madhya Pradesh, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Praveen","family":"Kaushik","sequence":"additional","affiliation":[{"name":"Department of Computer Science and Engineering, Maulana Azad National Institute of Technology (MANIT), Bhopal, Madhya Pradesh, India"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2019,7,30]]},"reference":[{"issue":"10","key":"e_1_3_1_2_2","first-page":"761","article-title":"Some statistical properties of random speckle patterns in coherent and partially coherent illumination","volume":"17","author":"Dainty J.C.","year":"1970","unstructured":"DaintyJ.C., Some statistical properties of random speckle patterns in coherent and partially coherent illumination, in OpticaActa 17(10) (1970), 761\u2013772.","journal-title":"OpticaActa"},{"key":"e_1_3_1_3_2","doi-asserted-by":"publisher","DOI":"10.1364\/JOSA.66.001145"},{"key":"e_1_3_1_4_2","doi-asserted-by":"publisher","DOI":"10.1109\/T-SU.1978.30978"},{"key":"e_1_3_1_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/0041-624X(81)90007-X"},{"key":"e_1_3_1_6_2","article-title":"When is speckle noise multiplicative","author":"Tur M.","year":"1982","unstructured":"TurM., ChinK.C. and GoodmanJ.W., When is speckle noise multiplicative? 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