کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
735979 1461737 2014 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Integrated digital image correlation for the evaluation and correction of optical distortions
ترجمه فارسی عنوان
همبستگی تصویری یکپارچه برای ارزیابی و اصلاح اعوجاج های نوری
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
چکیده انگلیسی


• The manuscript proposes a new DIC approach to the analysis of optical distortions.
• In particular, some specific developments of the technique are discussed when applied to printed or etched calibration objects.
• Last, a priori estimates of measurement uncertainties are validated a posteriori with experimental observations.

Optical aberrations are one of the biases affecting images. Their correction can be performed as a transformation of the image. In this paper, it is proposed to use digital image correlation to calculate the distortion fields. A correlation calculation is performed between a known numerical pattern and a picture of the same pattern printed or etched on a plate. This new procedure is applied to determine the distortion fields of a camera lens. First, a parametric description of the distortion field is used to reduce the degrees of freedom required to describe optical distortions. Second, a non-parametric model based upon splines is used. The distortion fields found by both methods are compared. A resolution analysis is performed for two different procedures (removing the lens between pictures or not). The standard displacement resolution is found to be of the order of 10-2 pixel in the first case, and 2.5×10−32.5×10−3 pixel in the second case.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics and Lasers in Engineering - Volume 56, May 2014, Pages 121–133
نویسندگان
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