THE METHOD OF GEOMETRIC CALIBRATION OF OPTOELECTRONIC SYSTEMS BASED ON ELECTRONIC TEST OBJECT
Designing remote sensing of the Earth devices is requires a lot of attention to evaluation lens distortion level and providing the required accuracy values of geometric calibration of optoelectronic systems at all. Test- objects known as most common tools for optical systems geometric calibration. T...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Belarusian National Technical University
2017-12-01
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| Series: | Pribory i Metody Izmerenij |
| Subjects: | |
| Online Access: | https://pimi.bntu.by/jour/article/view/347 |
| _version_ | 1797874802281676800 |
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| author | D. A. Kozhevnikov R. V. Feodortsau |
| author_facet | D. A. Kozhevnikov R. V. Feodortsau |
| author_sort | D. A. Kozhevnikov |
| collection | DOAJ |
| description | Designing remote sensing of the Earth devices is requires a lot of attention to evaluation lens distortion level and providing the required accuracy values of geometric calibration of optoelectronic systems at all. Test- objects known as most common tools for optical systems geometric calibration. The purpose of the research was creating an automatically method of distortion correction coefficients calculating with a 3 μm precision in the measurement process. The method of geometric calibration of the internal orientation elements of the optical system based on the electronic test object is proposed. The calculation of the test string brightness image from its multispectral image and filtered signal extrema position determination are presented. Ratio of magnitude of the distortion and interval center is given. Three variants of electronic test-objects with different step and element size are considered. Оptimal size of calibration element was defined as 3×3 pixels due to shape of the subpixels with the aspect ratio of the radiating areas about 1 : 3. It is advisable to use IPS as an electronic test object template. An experimental test and measurement stand functional diagram based on the collimator and optical bench «OSK-2CL» is showed. It was determined that test objects with a grid spacing of 4 and 8 pixels can’t provide tolerable image because of non-collimated emission of active sites and scattering on optical surfaces – the shape of the elements is substantially disrupted. Test-object with a 12 pixels grid spacing was used to distortion level analyzing as most suitable.Ratio of coordinate increment and element number graphs for two photographic lenses (Canon EF-S 17-85 f/4-5.6 IS USM and EF-S 18-55 f/3.5-5.6 IS II) are presented. A calculation of the distortion values in edge zones was held, which were respectively 43 μm and 51.6 μm. The technique and algorithm of software implementation is described. Possible directions of the method development are mentioned. |
| first_indexed | 2024-04-10T01:37:49Z |
| format | Article |
| id | doaj.art-2bc9bef0efe54c14a26b64f7e8cd8dec |
| institution | Directory Open Access Journal |
| issn | 2220-9506 2414-0473 |
| language | English |
| last_indexed | 2024-04-10T01:37:49Z |
| publishDate | 2017-12-01 |
| publisher | Belarusian National Technical University |
| record_format | Article |
| series | Pribory i Metody Izmerenij |
| spelling | doaj.art-2bc9bef0efe54c14a26b64f7e8cd8dec2023-03-13T09:14:47ZengBelarusian National Technical UniversityPribory i Metody Izmerenij2220-95062414-04732017-12-018437438510.21122/2220-9506-2017-8-4-46-54298THE METHOD OF GEOMETRIC CALIBRATION OF OPTOELECTRONIC SYSTEMS BASED ON ELECTRONIC TEST OBJECTD. A. Kozhevnikov0R. V. Feodortsau1Белорусский национальный технический университетБелорусский национальный технический университетDesigning remote sensing of the Earth devices is requires a lot of attention to evaluation lens distortion level and providing the required accuracy values of geometric calibration of optoelectronic systems at all. Test- objects known as most common tools for optical systems geometric calibration. The purpose of the research was creating an automatically method of distortion correction coefficients calculating with a 3 μm precision in the measurement process. The method of geometric calibration of the internal orientation elements of the optical system based on the electronic test object is proposed. The calculation of the test string brightness image from its multispectral image and filtered signal extrema position determination are presented. Ratio of magnitude of the distortion and interval center is given. Three variants of electronic test-objects with different step and element size are considered. Оptimal size of calibration element was defined as 3×3 pixels due to shape of the subpixels with the aspect ratio of the radiating areas about 1 : 3. It is advisable to use IPS as an electronic test object template. An experimental test and measurement stand functional diagram based on the collimator and optical bench «OSK-2CL» is showed. It was determined that test objects with a grid spacing of 4 and 8 pixels can’t provide tolerable image because of non-collimated emission of active sites and scattering on optical surfaces – the shape of the elements is substantially disrupted. Test-object with a 12 pixels grid spacing was used to distortion level analyzing as most suitable.Ratio of coordinate increment and element number graphs for two photographic lenses (Canon EF-S 17-85 f/4-5.6 IS USM and EF-S 18-55 f/3.5-5.6 IS II) are presented. A calculation of the distortion values in edge zones was held, which were respectively 43 μm and 51.6 μm. The technique and algorithm of software implementation is described. Possible directions of the method development are mentioned.https://pimi.bntu.by/jour/article/view/347дисторсиядистанционное зондирование землиэкспериментальный стендэлектронный тест-объектоптико-электронная система |
| spellingShingle | D. A. Kozhevnikov R. V. Feodortsau THE METHOD OF GEOMETRIC CALIBRATION OF OPTOELECTRONIC SYSTEMS BASED ON ELECTRONIC TEST OBJECT Pribory i Metody Izmerenij дисторсия дистанционное зондирование земли экспериментальный стенд электронный тест-объект оптико-электронная система |
| title | THE METHOD OF GEOMETRIC CALIBRATION OF OPTOELECTRONIC SYSTEMS BASED ON ELECTRONIC TEST OBJECT |
| title_full | THE METHOD OF GEOMETRIC CALIBRATION OF OPTOELECTRONIC SYSTEMS BASED ON ELECTRONIC TEST OBJECT |
| title_fullStr | THE METHOD OF GEOMETRIC CALIBRATION OF OPTOELECTRONIC SYSTEMS BASED ON ELECTRONIC TEST OBJECT |
| title_full_unstemmed | THE METHOD OF GEOMETRIC CALIBRATION OF OPTOELECTRONIC SYSTEMS BASED ON ELECTRONIC TEST OBJECT |
| title_short | THE METHOD OF GEOMETRIC CALIBRATION OF OPTOELECTRONIC SYSTEMS BASED ON ELECTRONIC TEST OBJECT |
| title_sort | method of geometric calibration of optoelectronic systems based on electronic test object |
| topic | дисторсия дистанционное зондирование земли экспериментальный стенд электронный тест-объект оптико-электронная система |
| url | https://pimi.bntu.by/jour/article/view/347 |
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