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Speckle Noise Case Study

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Study On The Reduction Of Speckle Noise In Ultrasound Images Mrs.Parineeta Suman1,Mrs.Deepa Parasar2,Dr Vijay Rathode3
1 Student (M.E), SCOE, Mumbai
2 Assistant Professor, SCOE, Mumbai
3 Ph.D, IIT Roorkee

In summary, the ultrasound images, the speckle noise is inherent in medical ultrasound images and it is the cause of reduced contrast-to-noise ratio and resolution. The presence of speckle noise is not attractive because it reduces the image quality and affects the tasks of the individual interpretation and paper diagnosis.This this study various techniques to reduce speckle noise from ultrasound images Post acquisition method as the only scale spatial filtering method and multi-scale method.
Keywords- noising, speckle noise, isotropic scattering transform Contourlet
1. Introduction
Ultrasound images are widely used in the medical field as it is relatively safe, economical, adaptable and transferable. Despite many advantages, ultrasound images contain noise called "speckle" that corrupts the image resolution and contrast makes the interpretation of the physical structure lying below extremely difficult for physicians.
Speckle noise in ultrasound image is introduced due to the nature of the consistency of the imaging modality, the interference of backscattered …show more content…
Map Filter: The purpose of the Gamma or maximum a posteriori (MAP) filter is to minimize the loss of texture information by assuming that the image of the forest areas, agricultural lands and oceans are gamma distributed scenes. This approach is better than the filter and Lee Frost and uses the coefficient of variation and contrast ratio with theoretical probability density function will determine the smoothing process. The algorithm is similar to the filter improved gel, except that if the local variation coefficient Ci falls between the two thresholds of Cu and Cmax, the filtered pixel value of the estimate is based on contrast ratios gamma to within the appropriate window filters given in

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