Measuring line roughness through aerial image contrast variation using coherent extreme ultraviolet spatial filtering techniques

2005 ◽  
Vol 23 (6) ◽  
pp. 2844 ◽  
Author(s):  
Michael D. Shumway ◽  
Patrick Naulleau ◽  
Kenneth A. Goldberg ◽  
Jeffrey Bokor
Keyword(s):  
Extreme Ultraviolet ◽  
Spatial Filtering ◽  
Image Contrast ◽  
Aerial Image ◽  
Measuring Line ◽  
Contrast Variation ◽  
Filtering Techniques

Survey on Spatial Filtering Techniques

2012 ◽  
Vol 3 (4) ◽  
pp. 153-156
Author(s):  
A.Rajamani A.Rajamani ◽  
◽  
Dr.V.Krishnaveni Dr.V.Krishnaveni
Keyword(s):  
Spatial Filtering ◽  
Filtering Techniques

scholarly journals Does the addition of a lead foil to digital radiographic receptors influence image contrast and approximal caries lesions diagnosis?

2020 ◽  
Vol 49 (4) ◽  
pp. 20190384
Author(s):  
Rocharles Cavalcante Fontenele ◽  
Yuri Nejaim ◽  
Amanda Farias Gomes ◽  
Hugo Gaêta-Araujo ◽  
Francisco Haiter-Neto ◽  
...  
Keyword(s):  
Standard Deviation ◽  
Image Contrast ◽  
Contrast Variation ◽  
Radiographic Images ◽  
Posterior Teeth ◽  
Diagnostic Values ◽  
Caries Lesions ◽  
Approximal Caries ◽  
Gray Values ◽  
Lead Foil

Objectives: To access the influence of the addition of a lead foil to intraoral digital radiographic receptors on image contrast and approximal caries lesions diagnosis. Methods: 40 posterior teeth were distributed in silicone phantoms composed of two premolars, two molars and a non-test canine. Radiographic images of the phantoms were obtained with and without the incorporation of a lead foil, using the Digora Optime and Digora Toto systems. Four observers scored the images for the presence of caries lesions, using a 5-point scale. Images of an aluminum step wedge were acquired with and without the incorporation of a lead foil. Gray values and standard deviation of gray values were calculated in different thickness of the step wedge and, then, contrast variation was calculated. Results: Presence of a lead foil did not influence caries lesions diagnostic values, regardless of the type of digital system (p > 0.05). In general, the objective analysis was not influenced by the presence of a lead foil in any of the tested systems (p > 0.05). However, Digora Toto images showed greater gray values, lower standard deviation of gray values and lower contrast variation, regardless of the presence of the lead foil (p < 0.05). Conclusions: The addition of a lead foil to intraoral digital receptors did not influence image contrast nor caries lesions diagnosis.

Aerial image characterization for the defects in the extreme ultraviolet mask

2004 ◽  
Author(s):  
Myoung-Sul Yoo ◽  
Seung-Wook Park ◽  
Jong-Hoi Kim ◽  
Yeong-Keun Kwon ◽  
Hye-Keun Oh
Keyword(s):  
Extreme Ultraviolet ◽  
Aerial Image
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