document: Multispectral color image capture using a liquid crystal tunable filter We describe the experimental setup of a multispectral color image acquisition system consisting of a professional monochrome CCD camera and a tunable filter in which the spectral transmittance can be controlled electronically . We perform a spectral characterization of the acquisition system taking into account the acquisition noise . To convert the camera output signals to device-independent color data , two main approaches are proposed and evaluated . One consists in applying regression methods to convert from the K camera outputs to a device-independent color space such as CIEXYZ or CIELAB . Another method is based on a spectral model of the acquisition system . By inverting the model using a principal eigenvector approach , we estimate the spectral reflectance of each pixel of the imaged surface
doc_bio_tags: B I I I O O B I I I O O O O O O O B I I I I O O O O B I I O O B I O O O B I O O O O O O O O B I O O B I O O O O B I O O O O B I I O O O O O O O O O O O O O O O O O B I O O O O O B I O O O O O O O B O B O O O O O O O B I O O B I O O O O O O O B I I O O O O B I O O B O O B I