Abstract: A method for converting an initial datum between a colour space of a first colorimetric system and a colour space of a second colorimetric system, the initial datum being formed of at least one element expressed in a colorimetric reference system, the method includes: converting the initial datum into a projected datum, by expressing the at least one element in the colour space of the first colorimetric system; adapting the projected datum into an adapted datum, by expressing the at least one element in the colour space of the second colorimetric system. The colour space of the first colorimetric system and of the second colorimetric system are each a hyperbolic space defined by a hyperbolic metric projective reference system.

Abstract: A method for constructing a colour space specific to an individual viewing a colour image on a display device, including at least the following steps: a first step of measuring an emitted spectral radiance; a second step of constructing a Euclidean colour space of the lights emitted by the display device; a third step of measuring, by computer, a luminance vector field perceived by the individual; a fourth step of constructing a model corresponding to the individual's perception of the colours.

Abstract: A method for reconstructing a colour image acquired by a photosensitive sensor covered with a mosaic of filters of different colours making up a base pattern, obtaining the product of a demosaicing matrix with a matrix representation of a mosaic image coming from the sensor following acquisition of the colour image by the sensor, the product of the demosaicing matrix with the matrix representation of the mosaic image performing an interpolation of the colour of each pixel of the mosaic image as a function of a pixel neighbourhood of a base pattern corresponding to the base pattern of the mosaic of filters.

Abstract: A method for constructing a colour space specific to an individual viewing a colour image on a display device, including at least the following steps: a first step of measuring an emitted spectral radiance; a second step of constructing a Euclidean colour space of the lights emitted by the display device; a third step of measuring, by computer, a luminance vector field perceived by the individual; a fourth step of constructing a model corresponding to the individual's perception of the colours.

Abstract: A method for reconstructing a colour image acquired by a photosensitive sensor covered with a mosaic of filters of different colours making up a base pattern, obtaining the product of a demosaicing matrix with a matrix representation of a mosaic image coming from the sensor following acquisition of the colour image by the sensor, the product of the demosaicing matrix with the matrix representation of the mosaic image performing an interpolation of the colour of each pixel of the mosaic image as a function of a pixel neighbourhood of a base pattern corresponding to the base pattern of the mosaic of filters.

Abstract: A method for estimating the image depth map of a scene, includes the following steps: providing (E1) an image, the focus of which depends on the depth and wavelength of the considered object points of the scene, using a longitudinal chromatic optical system; determining (E2) a set of spectral images from the image provided by the longitudinal chromatic optical system; deconvoluting (E3) the spectral images to provide estimated spectral images with field depth extension; and analyzing (E4) a cost criterion depending on the estimated spectral images with field depth extension to provide an estimated depth map.

Abstract: An image sensor having photosites forming an array (K×L) of K rows and L columns, including a first set of integrator circuits, with a first regulation by analog weighting in blocks of n×n? photosites, said photosites belonging to n adjacent columns and to n? adjacent rows, and a second set of integrator circuits, with a second regulation by analog weighting in blocks of m×m? photosites, said photosites belonging to m adjacent columns and to m? adjacent rows, n adjacent columns of a first set of columns of the array being connected to n×n? integrator circuits of the first set, m adjacent columns of a second set of columns of the array being connected to m×m? integrator circuits of the second set, n columns of the first set alternating with m columns of the second set to form the array of photosites.

Abstract: A method for estimating the image depth map of a scene, includes the following steps: providing (E1) an image, the focus of which depends on the depth and wavelength of the considered object points of the scene, using a longitudinal chromatic optical system; determining (E2) a set of spectral images from the image provided by the longitudinal chromatic optical system; deconvoluting (E3) the spectral images to provide estimated spectral images with field depth extension; and analyzing (E4) a cost criterion depending on the estimated spectral images with field depth extension to provide an estimated depth map.

Abstract: An image sensor having photosites forming an array (K×L) of K rows and L columns, including a first set of integrator circuits, with a first regulation by analog weighting in blocks of n×n? photosites, said photosites belonging to n adjacent columns and to n? adjacent rows, and a second set of integrator circuits, with a second regulation by analog weighting in blocks of m×m? photosites, said photosites belonging to m adjacent columns and to a adjacent rows, n adjacent columns of a first set of columns of the array being connected to n×n? integrator circuits of the first set, on adjacent columns of a second set of columns of the array being connected to m×m? integrator circuits of the second set, n columns of the first set alternating with on columns of the second set to form the array of photosites.

Abstract: The present invention relates to the acquisition of color images by a sensor including a plurality of photosites comprising spectral sensitivities that can to be different between photosites. The invention provides for a digital processing of signals emitted by the photosites, which comprises applying a spatial-chromatic transfer function to said signals, taking into account a variety of spectral sensitivities of the photosites. The sensor can then be devoid of a physical matrix of color filters. Spectral calibration of the sensor is also provided for this purpose, thus comprising the following steps: obtaining spectral sensitivity data of each photosite (S91), building a spatial-chromatic transfer function (S94) taking into account a variety of said spectral sensitivities of the photosites, and applying same to the signals emitted by the photosites in order to compensate for the aforementioned variety of sensitivities.

Abstract: The invention aims to solve the problem of eliminating the trade-off between the complexity of the digital image capture device and captured image reconstruction and the quality of the image. For this purpose, the invention provides a digital image capture sensor (18) including an array (16) of color filters, which array comprises a plurality of identical basic patterns (70) which are replicated with no overlap, each basic pattern being formed by color filters (72, 82, 84) which are pseudo-randomly arranged, such that each basic pattern (70) contains a variable pitch between two consecutive same-type color filters in the horizontal and/or vertical directions of the basic pattern.

Abstract: The present invention relates to the acquisition of colour images by a sensor including a plurality of photosites comprising spectral sensitivities that can to be different between photosites. The invention provides for a digital processing of signals emitted by the photosites, which comprises applying a spatial-chromatic transfer function to said signals, taking into account a variety of spectral sensitivities of the photosites. The sensor can then be devoid of a physical matrix of colour filters. Spectral calibration of the sensor is also provided for this purpose, thus comprising the following steps: obtaining spectral sensitivity data of each photosite (S91), building a spatial-chromatic transfer function (S94) taking into account a variety of said spectral sensitivities of the photosites, and applying same to the signals emitted by the photosites in order to compensate for the aforementioned variety of sensitivities.

Abstract: The invention aims to solve the problem of eliminating the trade-off between the complexity of the digital image capture device and captured image reconstruction and the quality of the image. For this purpose, the invention provides a digital image capture sensor (18) including an array (16) of colour filters, which array comprises a plurality of identical basic patterns (70) which are replicated with no overlap, each basic pattern being formed by colour filters (72, 82, 84) which are pseudo-randomly arranged, such that each basic pattern (70) contains a variable pitch between two consecutive same-type colour filters in the horizontal and/or vertical directions of the basic pattern.