TY - GEN

T1 - Optimal estimation of spectral reflectance based on metamerism

AU - Chou, Tzren Ru

AU - Lin, Wei Ju

PY - 2012

Y1 - 2012

N2 - In this paper, we proposed an accurate estimation method for spectral reflectance of objects captured in an image. The spectral reflectance is simply modeled by a linear combination of three basic spectrums of R, G, and B colors respectively, named as spectral reflective bases of objects, which are acquired by solving a linear system based on the principle of color metamerism. Some experiments were performed to evaluate the accuracy of the estimated spectral reflectance of objects. The average mean square error of 24 colors in Macbeth checker between we simulated and the measured is 0.0866, and the maximum is 0.310. In addition, the average color difference of the 24 colors is less than 1.5 under the D65 illuminant. There are 13 colors having their color difference values less than 1, and other 8 colors having the values during the range of 1 and 2. Only three colors are relatively larger, with the differences of 2.558, 4.130 and 2.569, from the colors of No. 2, No. 13, and No. 18 in Macbeth checker respectively. Furthermore, the computational cost of this spectral estimation is very low and suitable for many practical applications in real time.

AB - In this paper, we proposed an accurate estimation method for spectral reflectance of objects captured in an image. The spectral reflectance is simply modeled by a linear combination of three basic spectrums of R, G, and B colors respectively, named as spectral reflective bases of objects, which are acquired by solving a linear system based on the principle of color metamerism. Some experiments were performed to evaluate the accuracy of the estimated spectral reflectance of objects. The average mean square error of 24 colors in Macbeth checker between we simulated and the measured is 0.0866, and the maximum is 0.310. In addition, the average color difference of the 24 colors is less than 1.5 under the D65 illuminant. There are 13 colors having their color difference values less than 1, and other 8 colors having the values during the range of 1 and 2. Only three colors are relatively larger, with the differences of 2.558, 4.130 and 2.569, from the colors of No. 2, No. 13, and No. 18 in Macbeth checker respectively. Furthermore, the computational cost of this spectral estimation is very low and suitable for many practical applications in real time.

KW - metamerism

KW - multispectral imaging

KW - optimal spectral reflectance

KW - reflectance estimation

UR - http://www.scopus.com/inward/record.url?scp=84856881340&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84856881340&partnerID=8YFLogxK

U2 - 10.1117/12.907606

DO - 10.1117/12.907606

M3 - Conference contribution

AN - SCOPUS:84856881340

SN - 9780819489395

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Proceedings of SPIE-IS and T Electronic Imaging - Color Imaging XVII

T2 - Color Imaging XVII: Displaying, Processing, Hardcopy, and Applications

Y2 - 24 January 2012 through 26 January 2012

ER -