| 摘要 |
The scanner comprises an integrated photosensitive linear sensor ( 20 ) comprising N parallel lines of photosites, where N>=4, and preferably N>=6, with each line of photosites being associated with a respective bandpass optical filter. For each scanning step and for each pixel of the analyzed line, it delivers N corresponding quantized partial measurement values, each representative of the spectral reflectance of the document sensed through respective ones of the N filters. Spectral reconstruction means operate using an extrapolation method based on training from reference color samples, having a memory ( 42 ) storing a knowledge base formed from known spectral reflectance values of said reference samples, and a neural network ( 40 ) receiving as inputs the N quantized partial values and delivering as output at least one reconstituted quantized value representative of the spectral reflectance of the corresponding pixel of the document.
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