Abstract: There are provided methods and systems for color correcting displays with different color gamuts. A method includes performing an initial color correction on source picture content using a reference type display having a reference color gamut to obtain mastered color corrected picture content for display on reference type displays having the reference color gamut. The method further includes determining a first set of metadata defining a color gamut mapping specification for a color gamut mapping from a non-reference type display having a non-reference color gamut to the reference type display. The method also includes performing a subsequent color correction using the non-reference type display and the mastered color corrected picture content to create a second set of metadata directed to non-reference type displays having the non-reference color gamut.

Abstract: Image saturation of a sensor pixel array is reduced by adjusting RGB color channel gains for an LED light source. Pixel saturation information is obtained from a sensor pixel array with an image on it illuminated by the LED light source. It is then analyzed to determine saturation levels of the captured image for each RGB component of the LED light source. The gain of each RGB color channel of the LED light source is then adjusted to reduce pixel saturation when using the LED light source for image capturing.

Abstract: Method comprising: first mapping, in a reference color space, said source colors from a source color gamut into a reference color gamut, resulting in intermediate colors, second mapping said intermediate colors from said reference color gamut into said target color gamut, resulting in target colors forming at least one mapped image, wherein said first mapping is defined through information representing said second mapping

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 and an arrangement for color transfer between images for compensating color differences between at least two images as a first and a second image represented by pixel data are recommended, wherein for corresponding feature points of the images a color map and a geometric map are calculated for compensating a first image by applying said geometric map and said color map to the first image resulting in a compensated first image for detecting regions where a compensation fails by comparing the compensated first image with the second image to perform a color transfer excluding image regions where the compensation failed. The method can be performed on the fly and is applicable for equalizing color differences between images different in geometry and color.

Abstract: The method comprises the steps of: —determining, for each color of the second version, corresponding scalar value(s) of one or two variable(s) such that, if said scalar value(s) is applied to the color gamut mapping model, a mapped color is obtained having a minimal distance to the corresponding color of the first version (i.e. enhanced) to the color of second version, —encoding the determined scalar value(s) into an enhancement layer.

Abstract: There are provided methods and systems for color correcting displays with different color gamuts. A method includes performing color correction on source picture content, using at least one of a non-reference type display having a non-reference color gamut and a reference type display having a reference color gamut. The performing step includes mastering the source picture content to provide mastered color corrected picture content for display on the non-reference type displays having a non-reference color gamut. The performing step further includes generating metadata for a color gamut mapping that color transforms the mastered color corrected picture content for display on reference type displays having a reference color gamut. The source picture content is mastered only for the non-reference type displays having the non-reference color gamut.

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 present invention generally relates to a method and arrangement for estimating said at least one cross-channel colour mapping model from a set of tuples of corresponding colours relative to at least two images. The method is characterised in that it uses processing means for:—selecting at least one intermediate tuple of corresponding colours from the set of tuples of corresponding colours by using at least one channel-wise colour mapping model, and—estimating said at least one cross-channel colour mapping model from said at least one intermediate selected tuple of corresponding colours.

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: The present invention provides a method and system for determining and providing color metadata for a downlink data channel. In accordance with the present invention color metadata is determined such that gamut mapping is defined by a transmitted source gamut which enables adapted mapping that preserves saturation and contrast levels of the source for a downlink data channel. The metadata is then provided to a downlink data channel for color management.

Abstract: The method comprises: either a first step of color gamut mapping applied directly to the incoming RGB color coordinates resulting into mapped source coordinates R?G?B? and a second step where these source coordinates are transformed into target coordinates R?G?B?, or, a first step where the incoming source coordinates RGB are transformed into target coordinates R?G?B? and a second step of color gamut mapping applied directly to the target coordinates R?G?B? resulting into mapped target coordinates R?G?B?.

Abstract: The method comprises the generation of a deteriorated image associated with a first bit rate and of a deteriorated color transform associated with a second bit rate, an evaluation of a first distortion by comparison of the image with a first test image obtained by the application of the color transform to the deteriorated image, and of a second distortion by comparison of the image with a second test image obtained by the application of the deteriorated color transform to the image, and the determination of a final conjoint bit rate associated with a best trade-off between a conjoint bit rate (R=R1+R2) and a global distortion (dE=dE1+DE2). The optimized deteriorated image and the optimized deteriorated color transform are then embedded based on this conjoint bit rate.

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: According to this method, successive iterations are launched according to the following steps:—1) the reproduction color device is set according to settings,—2) reference input colors are calibrated putting calibrated input colors,—4) reproduction quality rating value are calculated,—5) a reproduction quality criterion is applied to decide or not to go for another iteration with different settings. This method allows the optimization of the settings according to color preferences.

Abstract: The invention relates to a method for image processing implementing a first step of alignment of at least two images representative of a same scene and having different colours, known as source image and target image respectively, delivering a first aligned image. According to the invention, such a method also implements: a second step of alignment of said source image and said first aligned image, delivering a second aligned image, a step of construction of a confidence mask, corresponding to an image identifying the regions in which said first aligned image is correctly aligned with said second aligned image.

Abstract: In order to preserve the discontinuities of an actual gamut surface and/or the discontinuities of its curvature, notably through a smoothing operation, in this method, when at least a vertex of any elementary polygon, the network of which represents an actual gamut boundary, belongs either to a line or a point of discontinuity of this actual gamut boundary, either to a line or a point of discontinuity of curvature of said actual gamut boundary, or both, metadata related to this belongings are added to the definition of the elementary polygons.

Abstract: Method for transforming a first version of a color to be reproduced by a proof viewing device a into a second version of the same color to be reproduced by the same proof viewing device in a way that a first human observer perceives this color reproduced on said proof viewing device according to said second version as this color is perceived on a final color reproduction device by a second human observer having human visual characteristics different from those of the first observer.

Abstract: A method and an arrangement for color transfer between images for compensating color differences between at least two images as a first and a second image represented by pixel data are recommended, wherein for corresponding feature points of the images a color map and a geometric map are calculated for compensating a first image by applying said geometric map and said color map to the first image resulting in a compensated first image for detecting regions where a compensation fails by comparing the compensated first image with the second image to perform a color transfer excluding image regions where the compensation failed. The method can be performed on the fly and is applicable for equalizing color differences between images different in geometry and color.