Color calibration method providing uniform distribution of color difference throughout the whole vision gamut

• Autorzy: Kretkowski M. , Shimodaira Y. , Jabłoński R.
• Konferencja: 8th International Conference on Global Research and Education – Inter-Academia 2009
• Języki publikacji: EN

Abstrakty

EN

Accurate reproduction of colors requires methods of calibrating a digital camera. In case of a camera which employs filters with spectral characteristics deduced from the color matching functions, a set of reference calibration colors must be used to obtain a conversion matrix between raw data from imaging sensor and colorimetric tristimulus values XYZ, from which the output signal is formed. The XYZ camera used for testing of the presented calibration me thod is capable of acquiring colors accurately in the whole vision gamut due to its filters. However, the well-established color references, like the Macbeth Chart or other similar color checkers, are not entirely sufficient for the calibration due to their enclosure in smaller color gamut (HDTV - High Definition Television) than the whole vision gamut. The presented method is based on choosing the calibration colors by their spectral distributions, which are related with the spectral characteristics of the filters. The obtained result was found to be ?E=1.57 for the designed colors.

Słowa kluczowe

EN

color gamut; color difference; LED color generator; color reference

• Wydawca: Łukasiewicz Industrial Research Institute for Automation and Measurements PIAP
• Czasopismo: Journal of Automation Mobile Robotics and Intelligent Systems
• Rocznik: 2009
• Tom: Vol. 3, No. 4
• Strony: 213--216
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Kretkowski M.

autor

Shimodaira Y.

autor

Jabłoński R.

• Graduate School of Electronic Science and Technology, Shizuoka University, 3-5-1 Johoku, Hamamatsu, 432-8561, Japan. and Warsaw University of Technology, Department of Mechatronics, Boboli 8, Warsaw, 02-525, Poland,

Bibliografia

• [1] Iwaki Y., Kuramoto M., Urabe H., Sugiura H., „An investigation of scene-referred color space based on image capture of real objects with a high-color fidelity digital camera system”. In: 14th Color Imaging Conference, 2006, pp. 165-169.
• [2] Ejaz T., Horiuchi T., Ohashi G., Shimodaira Y., “Development of a camera system for the acquisition of highfidelity colors”, IEICE Trans., vol. E89-C, 2006, pp. 1441-1447.
• [3] Cheung V., Westland S., Li C., Hardeberg J., Connah D.,“Characterization of trichromatic color cameras by using a new multispectral imaging technique”, JOSA A, Vol. 22, Issue &, pp.1231-1240.
• [4] Hunt R.W.G, “The Reproduction of Colour ”, ISBN ????, 1995.
• [5] Kretkowski M., Suzuki H., Shimodaira Y., Jabłoński R., “Development of color calibration methods for high fidelity color camera”,Reports of The Graduate School of Electronic Science and Technology, Shizuoka University, 2007.
• [6] Kretkowski M., Shimodaira H.Y., Jabłoński R., “New approach to color calibration of high fidelity color digital camera by using unique wide gamut color generator based on LED diodes”. In: SPIE International Symposium on Optomechatronic “Computer-Vision Systems III, paper 7266D-407, 2008, San Diego, USA.
• [7] DiCarlo J.M., Montgomery G.E., Trovinger S.W., “Emissive chart for imager calibration”. In: 12 Color Imaging Conference Color Science and Engineering Systems, Technologies, Applications, Scottsdale, Ariz., USA, 9 Nov. 2004, pp. 295-301.