Speckle Noise Reduction in Ultrasound Imaging using the Key Points in Low Degree Unbiased FIR Filters
Reducción del ruido speckle en imágenes de ultrasonido usando puntos de cruce en filtros FIR sin desplazamiento de orden bajo
Luis Javier Morales-Mendoza1, Rene Fabián Vázquez-Bautista1, Efrén Morales-Mendoza1 and Yuriy Semenovich Shmaliy2
1 Universidad Veracruzana, Poza Rica Ver., México javmorales@uv.mx, favazquez@uv.mx, efmorales@uv.mx
]]> 2 Universidad de Guanajuato, Salamanca Gto., México, shmaliy@salamanca.ugto.mx
Article received on 16/11/2010;
accepted on 08/02/2012.
Abstract
In this paper we present a method of reducing speckle noise ¡n applications for ultrasound image processing using low degree unbiased FIR filters. An important feature of the p-lag gain of unbiased FIR filters is that at some cross points it converges to the reduced degree gain. The results are evaluated in terms of the signal-to-noise ratio (SNR) and the root mean square error (RMSE) metrics. We show that ultrasound image enhancing with different degree FIR filters at special lags allows getting best results depending on applications.
Keywords: FIR filters, ultrasound image, cross points.
Resumen
]]> En este artículo, presentamos un método para reducir el ruido speckle en el procesamiento de imágenes de ultrasonido usando los filtros FIR sin desplazamiento de orden bajo. Una característica importante de la ganancia de los filtros FIR sin desplazamiento con paso-p es que en algunos puntos de cruce de la ganancia converge a una ganancia de grado inferior. Los resultados son evaluados en términos de las métricas de la relación señal-a-ruido (SNR) y del error cuadrático medio (RMSE). Se muestra que la imagen de ultrasonido mejorada por los filtros FIR de paso-p con diferentes grados de aproximación permite obtener mejores resultados en función de las aplicaciones.Palabras clave:
Filtros FIR, imagen de ultrasonido, puntos de cruce.
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