RESULTS OF HYPERSPECTRAL ANALYSIS FOR THE CHARACTERIZATION OF MUDWALL. COMPARISON BASED ON NORMALIZATION
<p>Currently, intervention in heritage is a task of social need. Non-destructive techniques are often used to carry out conservation and maintenance tasks. In the present. In this work we study the necessary calibration mode of a hyperspectral camera used in the characterization of the materia...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2019-08-01
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| Series: | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| Online Access: | https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLII-2-W15/929/2019/isprs-archives-XLII-2-W15-929-2019.pdf |
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| author | C. Pozo Ledesma L. F. Martínez Corrales M. Sánchez Fernández P. L. Aguilar Mateos J. J. Tejado |
| author_facet | C. Pozo Ledesma L. F. Martínez Corrales M. Sánchez Fernández P. L. Aguilar Mateos J. J. Tejado |
| author_sort | C. Pozo Ledesma |
| collection | DOAJ |
| description | <p>Currently, intervention in heritage is a task of social need. Non-destructive techniques are often used to carry out conservation and maintenance tasks. In the present. In this work we study the necessary calibration mode of a hyperspectral camera used in the characterization of the material to be conserved or to intervene. This camera is used to characterize the material according to its reflectance in different wavelengths. The result obtained is expressed as a function of the light condition at the time of the measurement. One of the most important phases of this technique is to normalize the values obtained in each take. This is conditioned by the intensity of light: the bigger it is, the bigger was reflectance value of a material at a given wavelength. This factor is corrected from patterns that are introduced in the scene. These patterns are elements whose reflectance values are known in the bands of the spectrum that the camera used registers. Likewise, they must reflect or absorb the maximum light (black and white reference, respectively) in order to delimit the maximum and minimum reflectance of each scene. These references will allow two scenes taken in different light conditions to be comparable. Therefore, the influence of black and white references on the scene is studied from the use of materials of different nature.</p> |
| first_indexed | 2024-12-14T15:09:54Z |
| format | Article |
| id | doaj.art-795ead793325442388fc9e0940d0eb29 |
| institution | Directory Open Access Journal |
| issn | 1682-1750 2194-9034 |
| language | English |
| last_indexed | 2024-12-14T15:09:54Z |
| publishDate | 2019-08-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| spelling | doaj.art-795ead793325442388fc9e0940d0eb292022-12-21T22:56:35ZengCopernicus PublicationsThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences1682-17502194-90342019-08-01XLII-2-W1592993510.5194/isprs-archives-XLII-2-W15-929-2019RESULTS OF HYPERSPECTRAL ANALYSIS FOR THE CHARACTERIZATION OF MUDWALL. COMPARISON BASED ON NORMALIZATIONC. Pozo Ledesma0L. F. Martínez Corrales1M. Sánchez Fernández2P. L. Aguilar Mateos3J. J. Tejado4INTERRA Research Institute. NEXUS Research Group. University of Extremadura, 10003 Cáceres, SpainINTERRA Research Institute. NEXUS Research Group. University of Extremadura, 10003 Cáceres, SpainINTERRA Research Institute. NEXUS Research Group. University of Extremadura, 10003 Cáceres, SpainINTERRA Research Institute. NEXUS Research Group. University of Extremadura, 10003 Cáceres, SpainTechnological Institute of Ornamental Rock and Construction Materials (INTROMAC), 10003 Cáceres, Spain<p>Currently, intervention in heritage is a task of social need. Non-destructive techniques are often used to carry out conservation and maintenance tasks. In the present. In this work we study the necessary calibration mode of a hyperspectral camera used in the characterization of the material to be conserved or to intervene. This camera is used to characterize the material according to its reflectance in different wavelengths. The result obtained is expressed as a function of the light condition at the time of the measurement. One of the most important phases of this technique is to normalize the values obtained in each take. This is conditioned by the intensity of light: the bigger it is, the bigger was reflectance value of a material at a given wavelength. This factor is corrected from patterns that are introduced in the scene. These patterns are elements whose reflectance values are known in the bands of the spectrum that the camera used registers. Likewise, they must reflect or absorb the maximum light (black and white reference, respectively) in order to delimit the maximum and minimum reflectance of each scene. These references will allow two scenes taken in different light conditions to be comparable. Therefore, the influence of black and white references on the scene is studied from the use of materials of different nature.</p>https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLII-2-W15/929/2019/isprs-archives-XLII-2-W15-929-2019.pdf |
| spellingShingle | C. Pozo Ledesma L. F. Martínez Corrales M. Sánchez Fernández P. L. Aguilar Mateos J. J. Tejado RESULTS OF HYPERSPECTRAL ANALYSIS FOR THE CHARACTERIZATION OF MUDWALL. COMPARISON BASED ON NORMALIZATION The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| title | RESULTS OF HYPERSPECTRAL ANALYSIS FOR THE CHARACTERIZATION OF MUDWALL. COMPARISON BASED ON NORMALIZATION |
| title_full | RESULTS OF HYPERSPECTRAL ANALYSIS FOR THE CHARACTERIZATION OF MUDWALL. COMPARISON BASED ON NORMALIZATION |
| title_fullStr | RESULTS OF HYPERSPECTRAL ANALYSIS FOR THE CHARACTERIZATION OF MUDWALL. COMPARISON BASED ON NORMALIZATION |
| title_full_unstemmed | RESULTS OF HYPERSPECTRAL ANALYSIS FOR THE CHARACTERIZATION OF MUDWALL. COMPARISON BASED ON NORMALIZATION |
| title_short | RESULTS OF HYPERSPECTRAL ANALYSIS FOR THE CHARACTERIZATION OF MUDWALL. COMPARISON BASED ON NORMALIZATION |
| title_sort | results of hyperspectral analysis for the characterization of mudwall comparison based on normalization |
| url | https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLII-2-W15/929/2019/isprs-archives-XLII-2-W15-929-2019.pdf |
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