Digital Multispectral Images Superimposition Based on Preliminary Calibration or Contour Analysis: Advantages and Disadvantages

Efimov, Aleksey I.; Kudinov, I. A.; Melnik, Olga V.; Nikiforov, Michael B.; Kholopov, Ivan S.

doi:10.1109/elektro49696.2020.9130339

Cited by 2 publications

(2 citation statements)

References 19 publications

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“…Taking into account that under poor visibility conditions images in one or even several EVS technical vision channels may in principle not contain informative objects (see, for example, Bondarenko [13] -frames of visible and LWIR channels in dense drizzle), the authors believe that at a priori uncertainty about the shooting conditions, the most robust approach to superimposition is based on the preliminary photogrammetric calibration of the EVS cameras [14]. For simultaneous calibration of all EVS cameras, a universal test object (UTO) is needed, which ensures the forming of a highcontrast image by cameras of all spectral ranges.…”

Section: Related Workmentioning

confidence: 99%

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Planar Test Objects for Photogrammetric Calibration of Enhanced Vision Systems Cameras: Application Practice

Kholopov

Kudinov

Nikiforov

2022

Proceedings of the 32nd International Conference on Computer Graphics and Vision

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Two variants of constructs of planar test objects, which can be used to evaluate the internal and external parameters of video cameras operating as part of an enhanced vision system consisting of several video cameras in the visible and infrared wavelength ranges, are considered: with stationary electric heater and with portable electric heater like dock station. The design of both planar test objects consists of the light planar aluminum plate, squares from dark vinyl film, electric heating element and thermostat. The design of the device for performing automated camera calibration is presented. It is shown that the evaluation of the homography matrix based on the results of the performed preliminary calibration makes it possible to superimpose visible and long wave infrared images with an absolute error of the order of units of pixels.

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Section: Related Workmentioning

confidence: 99%

“…The design of a planar UTO of this type is considered in detail in [14]. It consists of the light aluminum plate 1, electric heating element 2, squares from vinyl dark film 3, the thermostat 4,and stiffening ribs 5 (are mounted on reverse side) for good flatness (Figure 1).…”

Section: The Chessboard-like Planar Universal Test Objectmentioning

confidence: 99%

Planar Test Objects for Photogrammetric Calibration of Enhanced Vision Systems Cameras: Application Practice

Kholopov

Kudinov

Nikiforov

2022

Proceedings of the 32nd International Conference on Computer Graphics and Vision

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Strategies for generating panoramic video images without information about scene correspondences for multispectral distributed aperture systems

2021

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We derive analytical expressions for calculating the number of elementary computational operations required to generate several personal regions of interest in a panoramic computer-vision distributed-aperture system using two alternative strategies: strategy 1 involves acquisition of a complete panoramic frame, followed by the selection of personal regions of interest, while with strategy 2 the region of interest is directly formed for each user. The parameters of analytical expressions include the number of cameras in the distributed system, the number of users, and the resolution of panorama and user frames. The formulas obtained for the given parameters make it possible to determine a strategy that would be optimal in terms of a criterion of the minimum number of elementary computational operations for generating multiple personal regions of interest. The region of interest is generated using only a priori information about the internal and external camera parameters, obtained as a result of their photogrammetric calibration with a universal test object, and does not take into account information about scene correspondences at the boundaries of intersecting fields of view.

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Digital Multispectral Images Superimposition Based on Preliminary Calibration or Contour Analysis: Advantages and Disadvantages

Cited by 2 publications

References 19 publications

Planar Test Objects for Photogrammetric Calibration of Enhanced Vision Systems Cameras: Application Practice

Planar Test Objects for Photogrammetric Calibration of Enhanced Vision Systems Cameras: Application Practice

Strategies for generating panoramic video images without information about scene correspondences for multispectral distributed aperture systems

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