Comparing Images Using the Hausdorff Distance
IEEE Transactions on Pattern Analysis and Machine Intelligence
A new efficient approach for the removal of impulse noise from highly corrupted images
IEEE Transactions on Image Processing
Snakes, shapes, and gradient vector flow
IEEE Transactions on Image Processing
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Automatic or semi-automatic gradient based segmentation of ultrasound images is problematic because the inherent nature of ultrasound imaging produces speckle. The main concern of this paper is to remove speckle cause gradients that cannot be attributed to anatomic features. Application of despeckling algorithms attempt to remove or reduce the speckle noise and thus the pixelwise gradients caused by speckle. Yet, the despeckling algorithm should preserve edges and gradients that are due to anatomic features such as the boundaries of organs, differing tissues, etc. This paper proposes the use of the noise enhanced squeeze box filter to despeckle cardiac ultrasound images so that an application of well-know gradient based active contour methods can be used for segmentation.