Abstract: Disclosed is a method for determining the reflectance of an object, the method including a step of solving an equation having several unknowns, the equation being obtained from formed images, the reflectance of the object and the illumination of the external light source being two unknowns of the equation. The step of solving the equation includes: calculating solution points of the equation, interpolating the calculated points by way of an interpolation function, and using at least one of the following approximations to solve the equation: a first approximation according to which each image is derived from the emission of a separate light flash, a second approximation according to which the interpolation function determines the stability points of the equation.

Abstract: Disclosed is a method for determining the reflectance of an object, the method including a step of solving an equation having several unknowns, the equation being obtained from formed images, the reflectance of the object and the illumination of the external light source being two unknowns of the equation. The step of solving the equation includes: calculating solution points of the equation, interpolating the calculated points by way of an interpolation function, and using at least one of the following approximations to solve the equation: a first approximation according to which each image is derived from the emission of a separate light flash, a second approximation according to which the interpolation function determines the stability points of the equation.

Abstract: The present invention relates to a method for measuring the uniform diffuse reflectance ROBJ(?) at least at one point on an object (30) using a device (10) comprising a means (11) capable of emitting color illuminants expressed in the form of luminous flux and an electronic color image sensor (12). The present invention also relates to a device (10) comprising a means (11) for emitting color illuminants expressed as luminous flux of colors and an electronic color image sensor (12), for measuring the uniform diffuse reflectance ROBJ(?) at least at one point on an object (30) placed in a zone located opposite and substantially perpendicular to the said means (11) capable of emitting colors and located in the field of vision of the said electronic color image sensor (12) and being subjected to an external illuminant expressed as a constant and unknown external environmental luminous flux (40) denoted Iext(?).

Abstract: The present invention relates to a method for encoding the color of an object in multispectral form by adaptive compression, characterized in that said method comprises the following steps: determining an identifier of the color in the form of a logistics-dedicated code and having a European Article Numbering (EAN), Universal Product Code (UPC), or Domain Name System (DNS) distributed management structure; inserting a marker at the beginning of said code indicating that the code is a color code, as well as the type of storage; and creating a color encoding that can be interpreted by both a human being and a computer by being directly read, in the form of three elements, i.e. a sample of the color or of texture, a name, and a barcode/chip, using said code and the marker, which provides access to the bidirectional spectral reflectance of the color stored either locally or on a network, or both locally and on a network, and having a rendering model that is predetermined by said marker.

Abstract: A method for encoding the color of an object in multispectral form by adaptive compression, includes the following steps: determining an identifier of the color in the form of a logistics-dedicated code and having a European Article Numbering, Universal Product Code, or Domain Name System distributed management structure; inserting a marker at the beginning of the code indicating that it is a color code, and the type of storage; and creating a color encoding that can be interpreted by both a human being and a computer by being directly read, in the form of three elements, a sample of the color or texture, a name, and a barcode/chip, using the code and the marker, which provides access to the bidirectional spectral reflectance of the color stored either locally and/or on a network, and having a rendering model that is predetermined by the marker. The associated decoding method is also described.

Abstract: A method for measuring the uniform diffuse reflectance ROBJ(?) at least at one point on an object (30) using a device (10) including a unit (11) capable of emitting colour illuminants expressed in the form of luminous flux and an electronic colour image sensor (12). The present invention also relates to a device (10) including a unit (11) for emitting colour illuminants expressed as luminous flux of colours and an electronic colour image sensor (12), for measuring the uniform diffuse reflectance ROBJ(?) at least at one point on an object (30) placed in a zone located opposite and substantially perpendicular to the unit (11) capable of emitting colours and located in the field of vision of the electronic colour image sensor (12) and being subjected to an external illuminant expressed as a constant and unknown external environmental luminous flux (40) denoted Iext(?).