Abstract: 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.

Abstract: The document (12) is placed on a plane support (14) defining an object plane. The apparatus (10) includes a camera (16) situated at a distance from the document, and having an objective lens system forming an image of the document on an image plane. The camera has a photosensitive sensor scanning a line of the image plane in a first direction, and first motor means suitable for moving the sensor in controlled manner in a second direction that is distinct from the first in such a manner as to sweep the surface of the image plane in said second direction. At least one light generator (20) is also provided suitable for forming a narrow strip of light (36) on the object plane and oriented parallel to said first direction, the generator also including second motor means suitable for moving the strip of light in controlled manner so as to sweep the surface of the object plane parallel to said second direction.