Edge detection of reflectance transformation imaging for colorless traces

2021 ◽  
Author(s):  
Yunchao Tang ◽  
Lihua Huang ◽  
Jie Dai ◽  
Huijie Huang
Keyword(s):  
Edge Detection ◽  
Reflectance Transformation Imaging

Difference mode EXELFS with parallel-detection EELS

1992 ◽  
Vol 50 (2) ◽  
pp. 1262-1263
Author(s):  
Michael K. Kundmann ◽  
Ondrej L. Krivanek
Keyword(s):  
Edge Detection ◽  
Important Distinction ◽  
Edge Structure ◽  
Parallel Detection ◽  
Gain Variation ◽  
Ideal Solutions ◽  
Detector Cell ◽  
The Difference ◽  
Elemental Detection ◽  
Partial Correction

Parallel detection has greatly improved the elemental detection sensitivities attainable with EELS. An important element of this advance has been the development of differencing techniques which circumvent limitations imposed by the channel-to-channel gain variation of parallel detectors. The gain variation problem is particularly severe for detection of the subtle post-threshold structure comprising the EXELFS signal. Although correction techniques such as gain averaging or normalization can yield useful EXELFS signals, these are not ideal solutions. The former is a partial throwback to serial detection and the latter can only achieve partial correction because of detector cell inhomogeneities. We consider here the feasibility of using the difference method to efficiently and accurately measure the EXELFS signal.An important distinction between the edge-detection and EXELFS cases lies in the energy-space periodicities which comprise the two signals. Edge detection involves the near-edge structure and its well-defined, shortperiod (5-10 eV) oscillations. On the other hand, EXELFS has continuously changing long-period oscillations (∼10-100 eV).

Technological adaptation in Grooved Ware pottery from the Ness of Brodgar, Orkney, or how to make your cordons stick

2015 ◽  
Vol 36-37 (1) ◽  
pp. 51-63 ◽  
Author(s):  
Roy Towers ◽  
Nick Card
Keyword(s):  
Problem Solving ◽  
Pottery Production ◽  
Late Neolithic ◽  
Exterior Surface ◽  
Technological Adaptation ◽  
Reflectance Transformation Imaging

This paper describes a hitherto unidentified adaptation in Grooved Ware pottery at the Ness of Brodgar, Orkney ( Fig. 1 ). The technological technique adopted appears designed to cope with a common problem of Grooved Ware potters at the Ness: that of detached cordons, where applied decorative cordons on the exterior surface of the vessels are knocked off or simply fall off. The evidence shows that, in the case of one large pottery deposit from the site, some vessel exteriors were specially prepared in order to ensure cordon adhesion. The Ness of Brodgar site is introduced, issues surrounding pottery production and applied decoration in the Late Neolithic, particularly in Orkney, are noted and the problem-solving sherds are described. The paper is illustrated in part by the use of Reflectance Transformation Imaging (RTI).

A Dividing Ratio Changeable Digital PLL Based on Phase State Memory and Double Clock-Edge Detection

2008 ◽  
Vol 128 (7) ◽  
pp. 1185-1190 ◽  
Author(s):  
Kuniaki Fujimoto ◽  
Hirofumi Sasaki ◽  
Mitsutoshi Yahara
Keyword(s):  
Edge Detection ◽  
Phase State

Leading Edge Detection of RF-Signal for Power Arcing Source Location

2014 ◽  
Vol 9 (5) ◽  
pp. 1060
Author(s):  
Frank Zoko Ble ◽  
Matti Lehtonen ◽  
Ari Sihvola ◽  
Charles Kim
Keyword(s):  
Edge Detection ◽  
Leading Edge ◽  
Source Location ◽  
Rf Signal

Fusion Based Edge Detection and Segmentation of Color Spaces

2017 ◽  
Author(s):  
Prof. S. H. Jawale ◽  
Prof. A. B. Bavaskar
Keyword(s):  
Edge Detection ◽  
Color Spaces
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