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Prediction of Edge Displacement due to Image Contrast.

Prediction of Edge Displacement due to Image Contrast.

Authors :
Seo, Suyoung
Source :
Photogrammetric Record. Jun2017, Vol. 32 Issue 158, p119-140. 22p.
Publication Year :
2017

Abstract

This study proposes a method to predict the amount of edge displacement ( ED) caused by brightness difference in imaging. ED is a measure of the deviation of imaged edges from their true edge locations in the real world. A set of target sheets were designed to obtain reference lines and collect edge profiles for a given image contrast. A total of 330 target-sheet images of varying contrast and camera-to-object distances were used, with their EDs estimated using a Gaussian function. The EDs and pixel values of dark and light areas either side of an edge were then used as observations to predict EDs at a regular grid of pixel values using kriging, which is shown to be an effective method to fit the ED observations to a surface with high prediction accuracy. In addition, simulations indicate the need to correct EDs for accurate space intersection. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
0031868X
Volume :
32
Issue :
158
Database :
Academic Search Index
Journal :
Photogrammetric Record
Publication Type :
Academic Journal
Accession number :
123912258
Full Text :
https://doi.org/10.1111/phor.12189