title: Modified slanted-edge method and multidirectional modulation transfer function estimation.
abstract: The slanted-edge method specified in ISO Standard 12233, which measures the modulation transfer function (MTF) by analyzing an image of a slightly slanted knife-edge target, is not robust against noise because it takes the derivative of each data line in the edge-angle estimation. We propose here a modified method that estimates the edge angle by fitting a two-dimensional function to the image data. The method has a higher accuracy, precision, and robustness against noise than the ISO 12233 method and is applicable to any arbitrary pixel array, enabling a multidirectional MTF estimate in a single measurement of a starburst image.
authors.forename: Kenichiro
authors.initials: K
authors.lastname: Masaoka
authors.forename: Takayuki
authors.initials: T
authors.lastname: Yamashita
authors.forename: Yukihiro
authors.initials: Y
authors.lastname: Nishida
authors.forename: Masayuki
authors.initials: M
authors.lastname: Sugawara