Title :
Color constancy from multispectral images
Author :
Abrardo, A. ; Alparone, L. ; Cappellini, V. ; Prosperi, A.
Author_Institution :
Dept. of Inf. Eng., Siena Univ., Italy
Abstract :
This paper describes a computational method for estimating the body reflectance function of color surfaces. The experimental apparatus consists of a vision system having seven spectral channels whose wavelength sensitivities cover the visible spectrum. The estimation of the spectral-reflectance function is based on finite-dimensional linear models. In order to use digitized imaged data to evaluate the surface reflectance, a procedure for bypassing the problem of unknown illuminant spectral-power distribution was devised. For the simple objects utilized (color checker charts), it is found that an accuracy greater than 97% can be achieved
Keywords :
image colour analysis; image processing; body reflectance function; color checker charts; color constancy; color surfaces; computational method; digitized imaged data; multispectral images; spectral channels; spectral-reflectance function; vision system; wavelength sensitivities; Charge coupled devices; Charge-coupled image sensors; Color; Filters; High-resolution imaging; Lighting; Multispectral imaging; Reflectivity; Surface waves; Wavelength measurement;
Conference_Titel :
Image Processing, 1999. ICIP 99. Proceedings. 1999 International Conference on
Conference_Location :
Kobe
Print_ISBN :
0-7803-5467-2
DOI :
10.1109/ICIP.1999.817179
