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- W2369439093 abstract "The fringes region varies in measuring the lens focal length using Moire deflectometer, when different measured lens and others optical parameters are used. A method to determine valid fringes region and thresholding is put forward. A procedure to determine valid fringes region by using the maximum value of row and column derived from image data is described. The principle of automatic derterminating threshold based on gray scale histogram of image data in valid region is analyzed. A sketch map of fringes extracted by this method and results of focal length are given." @default.
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- W2369439093 date "2004-01-01" @default.
- W2369439093 modified "2023-09-23" @default.
- W2369439093 title "Fringes thresholding method in the measurement of lens focal length using Moire deflectometer" @default.
- W2369439093 hasPublicationYear "2004" @default.
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