Software compensation of chromatic-aberration effects on color photographs

Volkova, M.A., Ivanova, A.A., Lutsiv, V.R., Nedoshivina, L.S.

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Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Волкова М.А., Иванова А.А., Луцив В.Р., Недошивина Л.С. Программная компенсация эффектов хроматической аберрации на цветных фотографиях // Оптический журнал. 2019. Т. 86. № 12. С. 21–28. http://doi.org/10.17586/1023-5086-2019-86-12-21-28

Volkova M.A., Ivanova A.A., Lutsiv V.R., Nedoshivina L.S. Software compensation of chromatic-aberration effects on color photographs [in Russian] // Opticheskii Zhurnal. 2019. V. 86. № 12. P. 21–28. http://doi.org/10.17586/1023-5086-2019-86-12-21-28

For citation (Journal of Optical Technology):

M. A. Volkova, A. A. Ivanova, V. R. Lutsiv, and L. S. Nedoshivina, "Software compensation of chromatic-aberration effects on color photographs," Journal of Optical Technology. 86(12), 763-768 (2019). https://doi.org/10.1364/JOT.86.000763

Abstract:

A method is proposed for improving images formed by objectives with chromatic aberration. The focal length of an objective with this aberration depends on the wavelength, and therefore an image focused in one color range can be defocused and can have a different scale in another color range; this defocuses the picture and causes rainbow fringes to appear on the borders of objects. A description is given of how to correct such distortions by reducing images in the red, green, and blue color channels to the same scale and transferring the higher harmonics of the locally computed spatial Fourier spectrum from the more focused to the less focused channels. This also makes it possible to increase the depth of field of the picture. It is confirmed by experiments carried out in practice that the proposed method is effective.

Keywords:

longitudinal chromatic aberration, aberration of magnification, depth of field, complex spectral recording, image defocusing, optical system calibration

Acknowledgements:

The research was supported by the Ministry of Education and Science of the Russian Federation and partially supported by the Leading Universities of the Russian Federation (subsidy No. 074-U01).
We express our thanks to Mrs. Olga Bezymyannykh for help in constructing the software model.

OCIS codes: 080.0080, 080.1010, 100.0100, 100.2000, 110.6980

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