Abstract: The invention concerns a device for multimedia data retrieval. The multimedia data is associated with an active component. The device for multimedia retrieval being characterized in that, depending on an external event, some of the active components trigger an action that make the user aware of the multimedia data associated with said active components.

Abstract: A method and an arrangement for an improved outlier detection for color mapping. Spatial neighborhoods of feature points are used for outlier detection. For this purpose, Geometric Feature Correspondence neighborhoods of an initial color-corrected test-image and a reference image are compared in a neighborhood comparator.

Abstract: The invention concerns a device for multimedia data retrieval. The multimedia data is associated with an active component. The device for multimedia retrieval being characterized in that, depending on an external event, some of the active components trigger an action that make the user aware of the multimedia data associated with said active components.

Abstract: The invention concerns a device for multimedia data retrieval, said multimedia data being associated with an active component, said device being characterized in that, depending on an external event, some of the active components trigger an action that make the user aware of the multimedia data associated with said active components.

Abstract: A method for image processing of digital image pixels. Pixels are preferably filtered spatially and dithered, and the value for at least one color component is bit reduced. The space freed by the bit reduction is used to allocate a look-up table selection bit that indicates which look-up table (LUT), from a plurality of small LUTs partitioned from a bigger LUT, should be used for the color transform. The transformed pixels are then selected according to the used LUT, format converted and output. The invention, which also covers an apparatus and a pre-processing module, enables an apparatus with a LUT to be used both as a single full-rate LUT apparatus and as a lower-rate n smaller LUT apparatus.

Abstract: The spatial frequency analysis contained in the compressed image is used not only for decompression of images but also for the selection of an appropriate gamut mapping algorithm. Computation resources are then saved because no specific spatial frequency analysis is required for the selection of an appropriate gamut mapping algorithm.

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: 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: 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: 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: 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: 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: 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.

Abstract: According to the method, starting from the chromatic components xS, yS of the color vector to be converted, the components of an intermediate color vector RINT-CR, GINT-CR, ?INT-CR are-interpolated, whose chromatic components, expressed in the source color space are: xINT-CR=xS, yINT-CR=yS; starting from the luminance component SS of the color vector to be converted and from the luminance component ?INT-CR of the intermediate color vector, the luminance component ?D of the converted color vector is interpolated; the chromatic components RD, GD of the converted color vector are calculated from its luminance component ?D and from the components of the intermediate color vector RINT-CR, GINT-CR, ?INT-CR. The conversion methods of the prior art are substantially improved.

Abstract: The invention concerns a method and a device to determine a descriptor for a signal representing a multimedia item. The method comprises the step of applying to said signal a first bank of directional filters in order to obtain a first set of coefficients. According to the invention the method comprises the steps of: applying to said signal a second bank of filters in order to obtain a second set of coefficients representing the low-pass filtered signal, calculating a descriptor representing said multimedia element by making the difference between said first set of coefficients and said second set of coefficients and calculating associated power of said difference. Application to the classification and retrieval of multimedia items.