Computational analysis of Bayer colour filter arrays and demosaicking algorithms in digital photoelasticity
| Autor: | Juan C. Briñez de León, Alejandro Restrepo-Martínez, John W. Branch-Bedoya |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Photoelasticity
Demosaicing Computer science Mechanical Engineering Process (computing) 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials 010309 optics Stress field Digital image Color gel 0103 physical sciences Electrical and Electronic Engineering Image sensor 0210 nano-technology Image resolution Algorithm |
| Zdroj: | Optics and Lasers in Engineering. 122:195-208 |
| ISSN: | 0143-8166 |
| DOI: | 10.1016/j.optlaseng.2019.06.004 |
| Popis: | Digital photoelasticity often evaluates the stress fields in loaded structures by processing the colour intensities recorded in digital images. This makes the evaluation process sensitive to the accuracy of the colours recorded by cameras. This paper analyses errors introduced by cameras with Bayer colour filter arrays and demosaicking algorithms in the photoelasticity images, and consequently, in the stress recovered information. The results provide significant evidence suggesting that photoelasticity studies should pay attention to the effects of colour filter arrays and demosaicking algorithms because they introduce a variety of errors when evaluating the stress due to different experimental conditions, such as light sources, camera sensors, load applications, image resolution, geometry, and polariscope configurations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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