Frits Zernike

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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Zernike, Frits

 

Born July 16, 1888, in Amsterdam; died Mar. 10, 1966, in Groningen. Dutch physicist. Member of the Royal Netherlands Academy of Sciences (1946).

After graduating from the University of Amsterdam, Zernike received the degree of doctor of science from the university in 1915. He joined the staff of the University of Groningen in 1913 and served as a full professor from 1920 to 1958. Zernike’s principal works deal with such areas as optics and mathematical statistics. He made contributions to the theory of optical instruments, particularly the telescope and microscope. He discovered the phase-contrast principle in 1935 and subsequently built the first phase-contrast microscope. For his invention of the phase-contrast microscope, Zernike received a Nobel Prize in 1953.

WORKS

“Das Phasenkontrastverfahren bei der mikroskopischen Beobachtung.” Zeitschrift für technische Physik, 1935, year 16, no. 11.
“Phase Contrast, a New Method for the Microscopic Observation of Transparent Objects.” Physica, 1942, vol. 9, nos. 7 and 10.
“Wie ich den Phasenkontrast entdeckte.” Physikalische Blätter, 1955, year 11, issue 4.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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For shape classification, Zernike Moments are considered to be the best and most powerful shape descriptor.
Various features have been used to detect textured duplicated regions in copy-move forgery detection methods for instance, Local binary Patterns (LBP), Histogram of Gradient (HOG), Zernike moments (Zm) [36] which is robust to rotation, log polar transform [28] that detects rotated duplicated regions, Principle component analysis (PCA) and Singular value decomposition (SVD) that reduce the size of feature vector to enhance the time complexity.
[9] have proposed a technique based on Zernike moments to detect copy move forgeries.
Image Credit: New York Times KATE ZERNIKE and DENISE LU, NYT
As students, they were described as "docile notetakers" (Zernike 1).
As my colleague, Kate Zernike, and I reported in a front-page, 4,000-word investigation that August, claims that John Kerry fabricated the heroics for which he won the Silver Star during the Vietnam War were fabricated themselves, contradicted by Navy records and some of his accusers' own past statements.
adopt the Zernike moment to obtain the subpixel edge points and make the precision of the circular sun image centroid reach 0.07 pixel, which is obviously better than that of the gray centroid algorithm [22].
Four kinds of features are extracted as follows: [X.sup.G] (256-dimensional Gabor transformation feature), [X.sup.L] (121-dimensional Legendre moment feature), [X.sup.P] (36-dimensional Pseudo-Zernike moment feature), and [X.sup.Z] (30-dimensional Zernike moment feature).
Zernike moments are used as multimodal features during the matching phase and after the fusion of the match scores a Gaussian Mixture Model estimates the genuine and impostor densities of match scores for personal verification.