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image acquisition

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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
...Abstract Abstract This article reviews the main theoretical and practical aspects of sequence normally followed in digital image-acquisition, processing, analysis, and output for material characterization. It discusses the main methods of digital imaging, image processing, and analysis...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003758
EISBN: 978-1-62708-177-1
... concentrates on the basic properties of digital measurements that are the core of quantitative image analysis. It provides a brief description of the specimen and apparatus preparation as well as the image acquisition. The article explains how to evaluate stereological parameters and provides the general rules...
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
.... It discusses the processes of a machine vision system: image acquisition, image preprocessing, image analysis, and image interpretation. The article provides information on the uses of machine vision systems in three categories of manufacturing applications: visual inspection, identification of parts...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006681
EISBN: 978-1-62708-213-6
... Abstract Transmission electron microscopy (TEM) approach enables essentially simultaneous examination of microstructural features through imaging from lower magnifications to atomic resolution and the acquisition of chemical and crystallographic information from small regions of the thin specimen...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001766
EISBN: 978-1-62708-178-8
...Abstract Abstract Analytical transmission electron microscopy (ATEM) is unique among materials characterization techniques as it enables essentially the simultaneous examination of microstructural features through high-resolution imaging and the acquisition of chemical and crystallographic...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005504
EISBN: 978-1-62708-197-9
... a concern. Over recent years, steady improvements in automating material removal, digital image acquisition, and visualization of 3-D reconstructions using advanced computer software and hardware ( Ref 4 , 13 , 15 , 16 , 36 , 37 , 38 , 39 ) have made 3-D analysis techniques more accessible...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006770
EISBN: 978-1-62708-295-2
... of the image. While this can be annoying for image acquisition, it will not prevent obtaining an EDS spectrum. However, the buildup of charge will decelerate the incident electron beam, causing a variation in x-ray emission from what would normally be expected. Examination of the continuum or background...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001237
EISBN: 978-1-62708-170-2
.... In fact, the most effective way to remove this type of damage is to use mechanochemical abrasives such as colloidal silica. Figure 5 compares the effects of 0.25 μm diamond polish and a mechanochemical polish on Si 3 N 4 . Image acquisition for microstructural analysis is accomplished...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0009152
EISBN: 978-1-62708-186-3
... ( Ref 24 ). All machine vision systems can be considered to be operating in three stages: Image acquisition Image processing and analysis Interpretation Fig. 20 Sheet metal part with a grid of dots after forming. Source: Ref 23 In the image acquisition stage, the part...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003760
EISBN: 978-1-62708-177-1
... or semiautomated polishing or grinding, fiducial marks such as microhardness indents are often necessary to mark the area of interest, to align (or register) images in the x-y plane, and to track the actual material-removal rate. Prior to the commencement of actual image acquisition, the material-removal rate...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006464
EISBN: 978-1-62708-190-0
... and hardware remain warm for a considerable duration after power is shut off, so the gun may act as an unwanted source of IR radiation if it is in the field of view during image acquisition. Sources such as heat blankets, heating pads, or platens may be brought into direct contact with the sample to raise...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006564
EISBN: 978-1-62708-290-7
... in line with the process laser ( Ref 24 ), taking images at 800 fps. An iris and filter are used to reduce the intensity of the radiation from the melt pool. The size and shape of the melt pool is near circular and centered in the field of view as the beam moves at 5 mm/s (0.2 in./s). An image-acquisition...
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
...Abstract Abstract Computed tomography (CT) is an imaging technique that generates a three-dimensional (3-D) volumetric image of a test piece. This article illustrates the basic principles of CT and provides information on the types, applications, and capabilities of CT systems. A comparison...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006763
EISBN: 978-1-62708-295-2
... are needed, RAW file image acquisition is recommended. The professional digital camera body acceptance of interchangeable lenses is beneficial to failure analysis photographic documentation because of the need to perform overall component documentation as well as close-up macrophotography. A typical...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006660
EISBN: 978-1-62708-213-6
..., and there is no need to move the sample during acquisition. Where data over larger EBSD areas of the sample are needed, a different approach is required. Most modern SEMs have a limit to the lowest magnification or the largest field of view that can be imaged. The SEM should not be operated at the largest possible...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006677
EISBN: 978-1-62708-213-6
... section. (b) Cross section of a spherical particle from an iron powder. SEM image nicely shows the surface newly exposed by FIB milling. Courtesy of Tescan Orsay Holding, a.s. Fig. 39 (a) Ion beam and (b) electron beam images of a plasma focused ion beam serial-sectioning tomography acquisition...
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
... the highest possible imaging resolution of any linear imaging algorithm for a given configuration. For this reason, they sometimes are regarded as a gold standard ( Ref 18 ) against which alternatives can be compared. For example, if reduced transmission cycles are used to accelerate data-acquisition rates...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001774
EISBN: 978-1-62708-178-8
..., this is an absolute requirement for the acquisition of meaningful depth profiles. In the ion microscope, the direct-imaging optics preclude the need for electronic gating, because the extraction lens and field aperture combine to gate off the side-wall contributions mechanically. The mechanical aperture used...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006568
EISBN: 978-1-62708-290-7
... , 2016 , p 160 – 170 10.1016/j.matdes.2016.05.070 15. Cunningham R. , Zhao C. , Parab N. , Kantzos C. , Pauza J. , Fezzaa K. , Sun T. , and Rollett A.D. , Keyhole Threshold and Morphology in Laser Melting Revealed by Ultrahigh-Speed X-Ray Imaging...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001770
EISBN: 978-1-62708-178-8
... stainless steel sample that has been heated at 750 °C (1380 °F). Fig. 35 Scanning electron micrographs of a cam lobe at approximately the center of the nose of the lobe. (a) Image taken before a sputter etch. Numbered locations correspond to Auger depth profiles in Fig. 36 . (b) Image taken after...