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3D model based shading correction for the enhancement of multispectral colour measurement accuracy

: Zhang, C.; Breitbarth, A.; Rosenberger, M.; Notni, G.

Volltext ()

Institute of Physics -IOP-, London:
XXII World Congress of the International Measurement Confederation, IMEKO 2018 : 3-6 September 2018, Belfast, United Kingdom
Bristol: IOP Publishing, 2018 (Journal of physics. Conference series 1065)
Art. 032008, 5 S.
International Measurement Confederation (IMEKO World Congress) <22, 2018, Belfast>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer IOF ()

Shading effects induced by illumination and local object surface orientation could strongly deteriorate the accuracy of colour imaging. Therefore, a shading correction is needed for high colour fidelity. In this work a 3D model based inverse rendering approach is proposed for a narrowband multispectral 3D colour imaging system with a calibrated extern broadband light source. The colourimetric evaluation with an X-Rite colour checker shows that the proposed method could ensure a mean colour difference value CIEDE2000 ΔE < 3 for the viewing angle range -30° to 30°, while the maximal improvement factor concerning mean ΔE comes to 2.86.