Method of bringing locally varying images into coincidence in video capillaroscopy

Gurov, I.P., Volkov, M.V., Margaryants, N.B., Potemkin, A.V.

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Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Гуров И.П., Волков М.В., Маргарянц Н.Б., Потемкин А.В. Метод совмещения локально изменяющихся изображений в видеокапилляроскопии // Оптический журнал. 2019. Т. 86. № 12. С. 35–42. http://doi.org/10.17586/1023-5086-2019-86-12-35-42

Gurov I.P., Volkov M.V., Margaryants N.B., Potemkin A.V. Method of bringing locally varying images into coincidence in video capillaroscopy [in Russian] // Opticheskii Zhurnal. 2019. V. 86. № 12. P. 35–42. http://doi.org/10.17586/1023-5086-2019-86-12-35-42

For citation (Journal of Optical Technology):

I. P. Gurov, M. V. Volkov, N. B. Margaryants, and A. V. Potemkin, "Method of bringing locally varying images into coincidence in video capillaroscopy," Journal of Optical Technology. 86(12), 774-780 (2019). https://doi.org/10.1364/JOT.86.000774

Abstract:

This paper presents the results of a study of a method for estimating and compensating mutual displacements of locally varying images of a capillary network when a video sequence is being recorded in order to determine the flow rate of erythrocytes in the capillaries of a nail bed. A method is proposed for bringing images into coincidence in a video sequence, based on the use of a set of reference frames, relative to which the displacement of each image is estimated. It is shown that the proposed method reduces the (subpixel) errors in image alignment, such as local image deformations due to the nature of living biological tissue. Experimental estimates are obtained for the image-alignment error, which equalled 0.11 pixel when 30 reference frames were used. The proposed method has the advantages that it is highly noise resistant and has high computational efficiency in solving problems of video capillaroscopy.

Keywords:

capillar, flow rate of erythrocytes, bringing images into coincidence, video capillaroscopy

Acknowledgements:

The research was supported by the Ministry of Education and Science of the Russian Federation (project No. 8.2501.2017/4.6).

OCIS codes: 100.2960, 100.3010, 170.3880

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