Post-processing of Multi-look and Sequentially Formed Images in Radar and Ultrasonic Coherent Systems

Ponomarenko, N.N.; Bunaeva, I.

doi:10.1109/mwscas.2003.1562394

Cited by 4 publications

(3 citation statements)

References 9 publications

(16 reference statements)

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“…17,31,32 In general, according to these researches, there are no significant differences between the resultant images using different compounding strategies. In the system described, the compounding operator is replaceable and a mean operator is adopted for frame compounding.…”

Section: Methodsmentioning

confidence: 98%

“…Usually, this compounding technique is applied to static target imaging and can suffer from blurring due to misalignment between frames if the transducer or the target moves too rapidly. [15][16][17] This blurring effect causes a significant reduction in the sharpness of compound images, especially in ultrasound motion sequences. Generally, the more frames used for compounding, the greater the improvement in image quality and the greater potential for motion blurring.…”

Section: Introductionmentioning

confidence: 99%

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A Motion Compounding Technique for Speckle Reduction in Ultrasound Images

Lin

Sun²,

Lin³

2009

J Digit Imaging

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The quality of ultrasound images is usually influenced by speckle noise and the temporal decorrelation of the speckle patterns. To reduce the speckle noise, compounding techniques have been widely applied. Partially correlated images scanned on the same subject cross-section are combined to generate a compound image with improved image quality. However, the compounding technique might introduce image blurring if the transducer or the target moves too fast. This blurring effect becomes especially critical when assessing tissue deformation in clinical motion examinations. In this paper, an ultrasound motion compounding system is proposed to improve the quality of ultrasound motion sequences. The proposed motion compounding technique uses a hierarchical adaptive feature weighted motion estimation method to realign the frames before compounding. Each frame is first registered and warped to the reference frame before being compounded to reduce the speckle noise. Experimental results showed that the motion could be assessed accurately and better visualization could be achieved for the compound images, with improved signal-to-noise and contrast-to-noise ratios.

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Section: Methodsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

A Motion Compounding Technique for Speckle Reduction in Ultrasound Images

Lin

Sun²,

Lin³

2009

J Digit Imaging

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“…It is a quite typical situation in remote sensing, polarimetric radar systems 1-3 , hyperspectral imaging 4 , ultrasound medical diagnostics 5 , genomic imaging 6 , etc. that an image is noisy and it has to be pre-filtered before further processing.…”

Section: Introductionmentioning

confidence: 99%

Local adaptive filtering of images corrupted by nonstationary noise

et al. 2009

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In various practical situations of remote sensing image processing it is assumed that noise is nonstationary and no a priory information on noise dependence on local mean or about local properties of noise statistics is available. It is shown that in such situations it is difficult to find a proper filter for effective image processing, i.e., for noise removal with simultaneous edge/detail preservation. To deal with such images, a local adaptive filter based on discrete cosine transform in overlapping blocks is proposed. A threshold is set locally based on a noise standard deviation estimate obtained for each block. Several other operations to improve performance of the locally adaptive filter are proposed and studied. The designed filter effectiveness is demonstrated for simulated data as well as for real life radar remote sensing and marine polarimetric radar images.

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Mikrowave Propagation Factor at Small Grazing Angle Over Sea

Razskazovskyy

Logvinov

2007

2007 International Kharkiv Symposium Physics and Engrg. Of Millimeter and Sub-Millimeter Waves (MSMW)

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Post-processing of Multi-look and Sequentially Formed Images in Radar and Ultrasonic Coherent Systems

Cited by 4 publications

References 9 publications

A Motion Compounding Technique for Speckle Reduction in Ultrasound Images

A Motion Compounding Technique for Speckle Reduction in Ultrasound Images

Local adaptive filtering of images corrupted by nonstationary noise

Mikrowave Propagation Factor at Small Grazing Angle Over Sea

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