Abstract: In accordance with an exemplary embodiment, a method is provided to generate a color look up table for multiple images. The method includes selecting color points from a first image. The first color points comprise weak image texture. The method also includes identifying feature points in a spatial neighborhood of each first color point. Additionally, the method includes identifying feature points from a second image. The second feature points correspond to the first feature points. The method also includes determining a color points in the second image. The second color points correspond to the first color points, and are determined using a spatial interpolation of the first plurality of color points from the first plurality of feature points and then applying the obtained spatial interpolation to the second plurality of feature points. Further, the method includes generating the color lookup table.

Abstract: To describe the actual color gamut, a hierarchical structure is proposed which comprises, from bottom to top: Gamut Components: each GC is a surface, generally described as a set of connected elementary triangles or polygons. Gamut Hulls: each GH is a closed surface formed by the concatenation of connex Gamut Components. Gamut Instances: each GI is an alternative Gamut Boundary Description of the same actual gamut and is built by the union of the volume(s) bordered by at least one Gamut Hull. Such a Gamut Boundary Information may be notably used for gamut mapping operations. Among advantages of the invention, are flexibility and adaptation to available memory and bandwidth capabilities.

Abstract: A method, apparatus and system for assessing color characterization quality includes a characterization unit configured for determining at least one of a forward and inverse transform from a first set of device dependent input color values and measured output display values of the first set of device dependent input color values on the display and transforming a second set of device dependent input color values using the determined at least one of a forward and inverse transform to provide an intermediate set of device dependent input color values. The method, apparatus and system further includes a verification unit for performing at least one of a forward transform quality evaluation and an inverse transform quality evaluation.

Abstract: Method of mapping source colors from a source color device having an actual source gamut that is represented by a source convex (gamut boundary descriptor) and a source non-convex into target colors for a target color device having an actual target gamut that is represented by a target convex and a target non-convex, comprising, 1—if the source color to map is located outside the source non-convex, a pre-mapping step that maps the source color into the source non-convex, 2—if the mapped target color is located outside the target non-convex, a post-mapping step that maps the target color into the target non-convex. This method allows precise gamut mapping while allowing also for simple geometrical operations using convex gamuts.

Abstract: Method comprising the steps of: choosing a set of calibration colors within said scene, measuring each calibration color of said set such as to get a set of XYZ to represent each calibration color in the given colorimetric color space, by using said image capture device, capturing calibration colors such as to get a set of Raw RGB values to represent each calibration color, estimating a parametric color transform such that any set of Raw RGB values corresponding to a calibration color is transformed into a set of XYZ values corresponding to the same calibration color, building a color calibration transform by the concatenation of the parametric color transform with an output color transform.

Abstract: Method wherein each image of the content is transformed using at least one pre-transformed image which is associated with a key image of this content wherein, from each key image and an associated pre-transformed image, a color transform is derived, and wherein each color transform is applied to a selection of images of this content which is associated with said key image. Applied to a content broadcast system comprising a server and a receiver to which are connected several types of display devices, the invention advantageously makes it possible to adapt the content to these different types.

Abstract: The invention concerns a device for creating semantic browsing options comprising a means to select an initial set of images from an input database comprising a plurality of images, each image being associated with a semantic information out of a semantic information space, a means to determine a semantic information sub-space represented by the semantic information associated with said initial set of images, The device comprises also: a means to select a reduced sub-space out of said sub-space, a means to create semantic links to images of the database associated with the semantic information of said reduced sub-space, a means to display at least one image of the database associated with the semantic information of said reduced sub-space.

Abstract: In accordance with an exemplary embodiment, a method is provided to generate a color look up table for multiple images. The method includes selecting color points from a first image. The first color points comprise weak image texture. The method also includes identifying feature points in a spatial neighborhood of each first color point. Additionally, the method includes identifying feature points from a second image. The second feature points correspond to the first feature points. The method also includes determining a color points in the second image. The second color points correspond to the first color points, and are determined using a spatial interpolation of the first plurality of color points from the first plurality of feature points and then applying the obtained spatial interpolation to the second plurality of feature points. Further, the method includes generating the color lookup table.

Abstract: Before the transmission of the source color values of the images of each group Gk of images of this sequence, a partial color transform LUT related to this group Gk is generated, then transmitted, —and, a resultant color transform LUT related to said group Gk is reconstructed by combining the transmitted partial color transform look up table of this group Gk with, if any, all the other partial color transform look up tables that have been previously transmitted, —then each images of said group are color transformed using this LUT. The invention allows a good precision of color transformation with a limited bandwidth.

Abstract: This method comprises the following steps: displaying the different intermediate colour versions, from a visual comparison between displayed versions, selecting a second set, determining an intermediate colour transform able to transform an original version of said source image into each of said selected intermediate colour versions by a comparison between the original version of said source image with the selected intermediate colour version, building a final colour transform by combining each of the determined intermediate colour transforms, generating the final colour version by applying the built final colour transform to the original version of said source image.

Abstract: For each colour, the method comprises the following steps: —converting the first set of colour coordinates (R0, G0, B0)R representing this colour into a first set of visual tristimulus values (X0, Y0, Z0) representing said colour as perceived by a first observer when displayed using a first set of primaries, —converting said first set of visual tristimulus values (X0, Y0, Z0) into a second set of visual tristimulus values (Xi, Yi, Zi) representing the same colour as perceived by a second observer, —converting said second set of visual tristimulus values (Xi, Yi, Zi) into a second set of colour coordinates (Ri, Gi, Bi)C representing said colour as perceived by said second observer when displayed using a second set of primaries.

Abstract: A method and an arrangement for an improved outlier detection for colour mapping are recommended, wherein a neighborhood of a partially colour compensated test-image by comparing the initially corrected test-image with a reference image in a neighborhood comparator is used for outlier detection and not outlier detection of at least two images for colour mapping.

Abstract: A visual summary of the image sequences is generated, displaying at least one image from a plurality of the image sequences. Color correction is applied to a feature in one of the displayed images and images comprising at least one feature being close to the color corrected feature according to a distance criterion are selected, displayed, and color correction, based on the color correction to the feature, is applied to the features in the selected images. An apparatus is also provided.

Abstract: The invention relates to a method and a device for detecting the orientation of an image in a set of images. All images in this set of images contain at least one similar object. The method proposes to choose one image in this set of images as being a reference image. The orientation of the other images is detected based on the orientation of this reference image.

Abstract: The invention relates to a processing method of a sequence of images comprising image points each of which is associated with a color component. The method comprises a processing step of at least one image of the sequence from reference images, the processing step being adapted to reduce the flicker effects. According to the invention, the reference images are selected according to the following stages: calculate, for at least one image part of each of the images of the sequence, the mean value of the colour component, the mean value being associated with the image, and a first selection step to select from the mean values a first series of reference images forming a subset of the sequence.

Abstract: The invention concerns a device for generating mutual photometric effects and a server for delivering photometric parameters for generating mutual photometric effects and a system including such a device and such a server. The device comprises a receiver for receiving and demultiplexing the visual data sets and photometric parameters respectively associated with the data sets, a module for defining the mutual photometric effects to be generated for these photometric parameters, a compositor and a rendering module for positioning the visual data sets in the common support space and applying the effects defined for the photometric parameters from at least one of the visual data sets to at least one other of the visual data sets so that at least one visual data set influences one other visual data set in the common support space.

Abstract: In the different mapping planes, described by plane coordinates, of the color space in which colors to map are represented, a uniformity testing curve can be found that intersects all mapping trajectories of this mapping plane and, at any intersection of a mapping trajectory with said uniformity testing curve, the gradients calculated in said plane coordinates of the intersecting mapping lines and the first derivation along this uniformity testing of these gradients are continuous. Thank to the invention, colors are better preserved after mapping, even if there are different mapping methods in the same mapping plane.

Abstract: A method, apparatus and system for assessing color characterization quality includes a characterization unit configured for determining at least one of a forward and inverse transform from a first set of device dependent input color values and measured output display values of the first set of device dependent input color values on the display and transforming a second set of device dependent input color values using the determined at least one of a forward and inverse transform to provide an intermediate set of device dependent input color values. The method, apparatus and system further includes a verification unit for performing at least one of a forward transform quality evaluation and an inverse transform quality evaluation.

Abstract: A colour quality control device adapted for use in a system for colour correction of an image to be reproduced on at least one reproduction device that is calibrated by a reproduction forward transform. The system also comprises a colour correction device adapted to correct at least one colour in the image. The colour quality control device comprises a false contour detection unit that uses information from the reproduction forward transform to decide if a contour in the image is a false contour introduced by the transform. This facilitates the operator's work during colour correction. A system and a method are also provided.

Abstract: The viewing conditions sensing device comprises an image sensing device and is able to output target viewing conditions under which the image display device displays images. Then, a color appearance adaptation module transform reference colors of images delivered under reference viewing conditions into target colors under target viewing conditions, according to a color appearance model, as the CIECAM, differentiating a display field from a surround field. According to the invention, the viewing conditions sensing device further comprises identifying means adapted for identifying, within the sensing images, the contour of the display field. The background and the surround are therefore better connected and the CIECAM model can be implemented more efficiently.