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nonlinear imaging algorithms

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Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006452
EISBN: 978-1-62708-190-0
... methods. It also considers various methods of comparing the performance of arrays and imaging algorithms. The article provides a comparison of various advanced and nonlinear imaging algorithm and looks at some practical industrial applications of arrays. It concludes with some future perspectives...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005892
EISBN: 978-1-62708-167-2
...-dimensional (2-D or 3-D) finite-element models. Moreover, field analysis might imply the numerical solution to costly problems, such as nonlinear or time-dependent problems. Therefore, one of the goals of a cost-effective optimization algorithm is to reduce the number of function evaluations that is needed...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006444
EISBN: 978-1-62708-190-0
... for particularly small cracks and very small, shallow subsurface indications. Thermal Images Vibrothermography measurement yields a thermal image sequence, which can be interpreted manually, enhanced, and compressed using image- and data-analysis algorithms. The image sequence usually begins with a series...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002446
EISBN: 978-1-62708-194-8
... be linear or nonlinear functions of the design parameters and can be smooth or even discontinuous functions. General nonlinear mathematical programming algorithms are used when the order and/or smoothness of the performance measures is unknown ( Ref 3 ). Alternatively, special algorithms have been developed...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006456
EISBN: 978-1-62708-190-0
... of rotation and translation. The various types of scanning geometries are discussed in the section “ Computed Tomography System Design and Equipment ” in this article. CT Image Reconstruction Algorithm The CT image reconstruction algorithm generates a 3-D image from the set of 2-D radiation...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006439
EISBN: 978-1-62708-190-0
... by technical device tradeoffs. Random noise, so-called white noise, is caused by stray electrons. Those are influenced by heat differences on the sensor and other physical effects. Additionally, several image processing algorithms also cause noise. Dark noise is caused by the lack of illumination...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003757
EISBN: 978-1-62708-177-1
... of a transparent color that is ignored by the browser, and it can be recorded and displayed in an interlaced mode. This last characteristic allows the display of the image at increasing levels of detail, speeding up the interaction with the user. GIF is compressed, by default, with the LZW algorithm. Bit Map...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005553
EISBN: 978-1-62708-174-0
... provides the robustness to maintain stable control over the entire operating range of the process. Adaptive control algorithms have been developed for the nonlinear operating regions of the arc-voltage length relationship to ensure a more robust and stable control system throughout the entire operating...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005544
EISBN: 978-1-62708-197-9
... for image analysis. Developed through extreme programming methodologies, ITK's algorithms allow for registering and segmenting multidimensional data. National Library of Medicine, ITK Project http://www.itk.org Mimics Mimics software processes and edits two-dimensional image data, such as computed...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006451
EISBN: 978-1-62708-190-0
... with larger imaging arrays, and with the development of lower-cost uncooled IR detectors, it is becoming easier for researchers and practitioners outside of the experimental mechanics field to capitalize on this powerful technique and use it in a wider range of engineering applications. Theoretical...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006461
EISBN: 978-1-62708-190-0
... to perform straightforward two-dimensional (2-D) scans on the surface of the sample, giving images that are very useful for detecting damage and studying damage distribution. A combination of wedge and immersion ultrasonic testing can be used to obtain constant coupling, which is essential for nonlinear...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006478
EISBN: 978-1-62708-190-0
... be accomplished using PE ultrasonic methods. However, data from TT methods are normally presented in the C-scan mode, which presents an image of the part with gray scale or color values relating to the attenuation experienced. This is perhaps the easiest ultrasonic presentation to interpret. Pulse-echo...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003436
EISBN: 978-1-62708-195-5
... be accomplished using pulse-echo ultrasonic methods. However, data from TT methods are normally presented in the C-scan mode, which presents an image of the part with gray scale or color values relating to the attenuation experienced. This is perhaps the easiest ultrasonic presentation to interpret. Pulse...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.9781627081900
EISBN: 978-1-62708-190-0
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005876
EISBN: 978-1-62708-167-2
..., for example, a cylindrical system, and for rectangular boundaries. When dealing with rectilinear boundaries, consideration is restricted to fields arising from specified flux density and potential distributions at the boundary, because the method of images gives a simpler treatment of fields due to line...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006438
EISBN: 978-1-62708-190-0
... sonic, flash heating lamps, inductively coupled eddy currents, and lasers. Visual image processing algorithms designed to detect subtle differences between a reference part image and an inspection object or between images of a part taken after a time interval looking for indications of change...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005814
EISBN: 978-1-62708-165-8
.... 7 (a) Schematic diagram of the conical-end probe. (b) Thermal response measured by the thermocouple labeled as T/C 3 during an experiment with water at 60 °C (140 °F) flowing at 0.2 m/s (0.7 ft/s). (c) Images taken from the video recording (the scale on the photographs is given in millimeters...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005218
EISBN: 978-1-62708-187-0
...Abstract Abstract Metal transparency and interaction with X-rays have been recognized as obvious candidate principles from which methods for in situ monitoring of solidification processes could be developed. This article describes the use of X-ray imaging-based techniques to investigate...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005168
EISBN: 978-1-62708-186-3
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005426
EISBN: 978-1-62708-196-2
... and process design Background and History Computational fluid dynamics has as its objective the numerical solution of fluid-flow equations. The calculus problem of solving a coupled system of nonlinear partial differential equations (PDEs) for the variables of interest (e.g., velocity, pressure...