Location

Brunswick, ME

Start Date

1-1-1992 12:00 AM

Description

The use of ultrasonic imaging for the detection of flaws is a common non-destructive evaluation (NDE) technique. However, like most imaging techniques, ultrasonic images are degraded by blurring due to practical limitations of the ultrasound system. Consequently, while detection of a flaw may be simple, the characterization of the flaw may be quite difficult. In addition, even the detection of flaws may be challenging because of the presence of correlated noise. Correlated spatial noise is generally the result of inherent structure present in the material and could be more appropriately referred to as ‘unwanted signal’. However, since this is the most dominant image feature which restricts the ability to detect low reflectivity flaws, this unwanted signal will be referred to as ‘noise’.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

11A

Chapter

Chapter 3: Interpretive Signal Processing and Image Reconstruction

Section

Signal Processing

Pages

895-902

DOI

10.1007/978-1-4615-3344-3_115

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

A True Wiener Filter Implementation for Improving Signal to Noise and Resolution in Acoustic Images

Brunswick, ME

The use of ultrasonic imaging for the detection of flaws is a common non-destructive evaluation (NDE) technique. However, like most imaging techniques, ultrasonic images are degraded by blurring due to practical limitations of the ultrasound system. Consequently, while detection of a flaw may be simple, the characterization of the flaw may be quite difficult. In addition, even the detection of flaws may be challenging because of the presence of correlated noise. Correlated spatial noise is generally the result of inherent structure present in the material and could be more appropriately referred to as ‘unwanted signal’. However, since this is the most dominant image feature which restricts the ability to detect low reflectivity flaws, this unwanted signal will be referred to as ‘noise’.