کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1533729 1512569 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Statistic estimation and validation of in-orbit modulation transfer function based on fractal characteristics of remote sensing images
ترجمه فارسی عنوان
برآورد و اعتبار سنجی عملکرد تابع انتقال مدولاسیون در مدار بر اساس ویژگی های فراکتال تصاویر تصویربرداری از راه دور است
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
چکیده انگلیسی


• We build a model based on fractal principle of remote sensing images.
• The model parameters are analyzed.
• The model is used for modulation transfer function (MTF) estimation.
• The results of MTF estimation method we proposed are given.
• The MTF estimation method we proposed is verified by edge method.

This paper deals with the estimation of an in-orbit modulation transfer function (MTF) by a remote sensing image sequence, which is often difficult to measure because of a lack of suitable target images. A model is constructed which combines a fractal Brownian motion model that describes natural images stochastic fractal characteristics, with an inverse Fourier transform of an ideal remote sensing image amplitude spectrum. The model is used to decouple the blurring effect and an ideal natural image. Then, a model of MTF statistical estimation is built by standard deviation of the image sequence amplitude spectrum. Furthermore, model parameters are estimated by the ergodicity assumption of a remote sensing image sequence. Finally, the results of the statistical MTF estimation method are given and verified. The experimental results demonstrate that the method is practical and effective, and the relative deviation at the Nyquist frequency between the edge method and the method in this paper is less than 5.74%. The MTF estimation method is applicable for remote sensing image sequences and is not restricted by the characteristic target of images.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 354, 1 November 2015, Pages 202–208
نویسندگان
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