Abstract: A process for digitizing closed books without having to open them, of printed documents or manuscripts, bound or in batches, without having to separate them, using an imaging system of a three-dimensional object by Terahertz waves including acquiring by an THz acquisition subsystem a set of three-dimensional low-resolution images representative of this object and obtained by application of shifts orthogonal three-dimensional in translation according to which the object and the THz acquisition subsystem are relatively shifted relative to each other, a process in which, during these three-dimensional shifts, the amplitude of the relative shift in each of these three dimensions is less than the spatial resolution of the THz acquisition subsystem in each of these three dimensions and a three-dimensional super-resolution processing step is provided, capable of generating a super-resolved 3D image from a linear combination of 3D low-resolution images and an image-restoration step capable of generating a restored su

Abstract: A process for digitizing closed books without having to open them, of printed documents or manuscripts, bound or in batches, without having to separate them, using an imaging system of a three-dimensional object by Terahertz waves including acquiring by an THz acquisition subsystem a set of three-dimensional low-resolution images representative of this object and obtained by application of shifts orthogonal three-dimensional in translation according to which the object and the THz acquisition subsystem are relatively shifted relative to each other, a process in which, during these three-dimensional shifts, the amplitude of the relative shift in each of these three dimensions is less than the spatial resolution of the THz acquisition subsystem in each of these three dimensions and a three-dimensional super-resolution processing step is provided, capable of generating a super-resolved 3D image from a linear combination of 3D low-resolution images and an image-restoration step capable of generating a restored su

Abstract: A method of acquiring and processing images of an article, such as a tooth in the mouth, for example, the apparatus comprising an ultraviolet light source for illuminating the article, a matrix-type video camera for taking video images of the article illuminated in ambient light and in ultraviolet light, and control and data processor means.

Abstract: A method and apparatus for acquiring and processing images of a tooth, comprising means for exciting a zone (12) of a tooth by monochromatic ultraviolet light pulses in alternation with visible light pulses, video means (32, 34, 36, 38) for taking fluorescence images emitted by the tooth in two respective high and low energy wavelength bands of the emission spectrum, and data processor means (40) for taking the ratio of the fluorescence spectrum intensities in said two wavelength bands and for deducing therefrom the presence or the absence of caries in the zone (12) under examination of the tooth.