Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 2

Medical Image Processing Related Abstracts

2 Reduction of Speckle Noise in Echocardiographic Images: A Survey

Authors: Ahmed Ben Hamida, Fathi Kallel, Saida Khachira, Mohamed Ben Slima

Abstract:

Speckle noise is a main characteristic of cardiac ultrasound images, it corresponding to grainy appearance that degrades the image quality. For this reason, the ultrasound images are difficult to use automatically in clinical use, then treatments are required for this type of images. Then a filtering procedure of these images is necessary to eliminate the speckle noise and to improve the quality of ultrasound images which will be then segmented to extract the necessary forms that exist. In this paper, we present the importance of the pre-treatment step for segmentation. This work is applied to cardiac ultrasound images. In a first step, a comparative study of speckle filtering method will be presented and then we use a segmentation algorithm to locate and extract cardiac structures.

Keywords: Medical Image Processing, Segmentation, Snakes, Image Enhancement, speckle noise, ultrasound images, speckle filtering

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1 A Modified Shannon Entropy Measure for Improved Image Segmentation

Authors: M. Akbar, Mohammad A. U. Khan, Omar A. Kittaneh, Tariq M. Khan, Husam A. Bayoud

Abstract:

The Shannon Entropy measure has been widely used for measuring uncertainty. However, in partial settings, the histogram is used to estimate the underlying distribution. The histogram is dependent on the number of bins used. In this paper, a modification is proposed that makes the Shannon entropy based on histogram consistent. For providing the benefits, two application are picked in medical image processing applications. The simulations are carried out to show the superiority of this modified measure for image segmentation problem. The improvement may be contributed to robustness shown to uneven background in images.

Keywords: Medical Image Processing, Modification, Shannon Entropy, Image Segmentation

Procedia PDF Downloads 299