step wedge


Also found in: Dictionary, Thesaurus, Medical, Financial.

step wedge

[′step ‚wej]
(graphic arts)
A series of tones in steps from white to black usually on film or a glass plate for testing purposes.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
Mentioned in ?
References in periodicals archive ?
where r is the random variable (in this case, the uniform probability distribution) and [omega] is the width of the class interval about the quantised variable x in the step wedge. This operation produces a random scatter plot suitable for regression analysis.
Quantification of Uncertainty in Mathematical Models: The Statistical Relationship between Field and Laboratory pH Measurements
Concerning the radiopacity of materials, the International Organization for Standardization has stated that radiopacity is evaluated using the aluminum step wedge technique with a range of 0.5-5.0 mm thickness at 0.5 mm increments at an accuracy of >98% purity and 0.05 mm variation in thickness [17].
Numerical Evaluation of Image Contrast for Thicker and Thinner Objects among Current Intraoral Digital Imaging Systems
Optical density means were calculated based on the measurements taken in three different areas of each sample and on the fifth step of the step wedge (which corresponded to 5 mm).
Evaluation of the optical density of composite resins with the use of nanotechnology by means of intraoral radiographic system (CMOS)/Avaliacao da densidade optica de resinas compostas de nanotecnologia por meio de sistema radiografico intraoral (CMOS)
The films were exposed to an optical step wedge created by a software program built into the Kodak Dry View 8300 unit (Kodak, Rochester, New York).
Optical density changes in dry-processed films
X-ray machines are also submitted by their manufacturers to be certified as meeting certain standards - most notably the ASTM Step Wedge Test.
Developing the right sensitivity to weapons

Encyclopedia browser ?
Full browser ?