Metrological Evaluation of the Demosaicking Effect on Colour Digital Image Correlation with Application in Monitoring of Paintings
A modified 3D colour digital image correlation method (3D cDIC) is proposed for efficient displacement measurements of colour objects with natural texture. The method is using a separate analysis of correlation coefficient (sigma) value in the RGB channels of CCD cameras by utilising local informati...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-09-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/22/19/7359 |
| _version_ | 1797476967049592832 |
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| author | Athanasia Papanikolaou Piotr Garbat Malgorzata Kujawinska |
| author_facet | Athanasia Papanikolaou Piotr Garbat Malgorzata Kujawinska |
| author_sort | Athanasia Papanikolaou |
| collection | DOAJ |
| description | A modified 3D colour digital image correlation method (3D cDIC) is proposed for efficient displacement measurements of colour objects with natural texture. The method is using a separate analysis of correlation coefficient (sigma) value in the RGB channels of CCD cameras by utilising local information from the channel with the minimum sigma. In this way, merged U, V and W displacement maps are generated based on the local correlation quality. As the proposed method applies to colour filter array cameras, the images in RGB channels have to undergo a demosaicking procedure which directly influences the accuracy of displacement measurements. In the paper, the best performing demosaicking methods are selected. The metrological analysis of their influence on the results of canvas paintings investigations obtained by unmodified and modified 3D cDIC processing is presented. |
| first_indexed | 2024-03-09T21:11:18Z |
| format | Article |
| id | doaj.art-a1692dec4caf4cd4aa36c2133453b950 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T21:11:18Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-a1692dec4caf4cd4aa36c2133453b9502023-11-23T21:47:55ZengMDPI AGSensors1424-82202022-09-012219735910.3390/s22197359Metrological Evaluation of the Demosaicking Effect on Colour Digital Image Correlation with Application in Monitoring of PaintingsAthanasia Papanikolaou0Piotr Garbat1Malgorzata Kujawinska2Faculty of Mechatronics, Warsaw University of Technology, 08-525 Warsaw, PolandFaculty of Electronics and Information Technology, Warsaw University of Technology, 00-665 Warsaw, PolandFaculty of Mechatronics, Warsaw University of Technology, 08-525 Warsaw, PolandA modified 3D colour digital image correlation method (3D cDIC) is proposed for efficient displacement measurements of colour objects with natural texture. The method is using a separate analysis of correlation coefficient (sigma) value in the RGB channels of CCD cameras by utilising local information from the channel with the minimum sigma. In this way, merged U, V and W displacement maps are generated based on the local correlation quality. As the proposed method applies to colour filter array cameras, the images in RGB channels have to undergo a demosaicking procedure which directly influences the accuracy of displacement measurements. In the paper, the best performing demosaicking methods are selected. The metrological analysis of their influence on the results of canvas paintings investigations obtained by unmodified and modified 3D cDIC processing is presented.https://www.mdpi.com/1424-8220/22/19/7359colour digital image correlationdemosaickingcultural heritagenatural texturecanvas paintingsDIC metrology |
| spellingShingle | Athanasia Papanikolaou Piotr Garbat Malgorzata Kujawinska Metrological Evaluation of the Demosaicking Effect on Colour Digital Image Correlation with Application in Monitoring of Paintings Sensors colour digital image correlation demosaicking cultural heritage natural texture canvas paintings DIC metrology |
| title | Metrological Evaluation of the Demosaicking Effect on Colour Digital Image Correlation with Application in Monitoring of Paintings |
| title_full | Metrological Evaluation of the Demosaicking Effect on Colour Digital Image Correlation with Application in Monitoring of Paintings |
| title_fullStr | Metrological Evaluation of the Demosaicking Effect on Colour Digital Image Correlation with Application in Monitoring of Paintings |
| title_full_unstemmed | Metrological Evaluation of the Demosaicking Effect on Colour Digital Image Correlation with Application in Monitoring of Paintings |
| title_short | Metrological Evaluation of the Demosaicking Effect on Colour Digital Image Correlation with Application in Monitoring of Paintings |
| title_sort | metrological evaluation of the demosaicking effect on colour digital image correlation with application in monitoring of paintings |
| topic | colour digital image correlation demosaicking cultural heritage natural texture canvas paintings DIC metrology |
| url | https://www.mdpi.com/1424-8220/22/19/7359 |
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