Abstract: A display control system (11) comprises an input (12) for receiving an image to be displayed by means of a backlight (2) and a transmissive panel (3). A backlight controller (5) provides different colors or luminances for causing the backlight (2) to sequentially apply the different colors or luminances to the transmissive panel (3) in time-sequential sub-fields of the image. A transmissive panel controller (6) provides transmittivities for causing the transmissive panel (3) to sequentially apply the transmittivities to the transmissive panel in the time-sequential sub-fields of the image for displaying the image. The transmissive panel controller (6) selects a transmittivity based on a predetermined amount of off-axis gamma distortion of the transmissive panel.

Abstract: An auto-stereoscopic display device which addresses the problem of how to provide an improved three dimensional effect without degrading the resolution of the views. The auto-stereoscopic display device comprises: image forming means having an array of display pixels for producing a display; view forming means positioned in registration with the image forming means and having an array of view forming elements, the view forming elements each being configurable to focus the outputs of groups of the display pixels into a plurality of views projected towards a user in different directions; and view deflecting means positioned in registration with the view forming means, the view deflecting means being arranged to selectably change the directions in which the plurality of views are projected towards the user.

Abstract: A method of gamut mapping maps an input image composed of pixels and having an input gamut (IG) defined by input RGB primaries (Ri, Gi, Bi) to a reproduction gamut (RG) defined by reproduction RGB primaries (Ro, Go, Bo). The reproduction gamut (RG) is narrower than the input gamut (IG). An input signal (RGBin) defined with respect to the input RGB primaries (Ri, Gi, Bi) is color transformed (1) into a transformed signal (RGBt) defined with respect to the reproduction RGB primaries (Ro, Go, Bo), whereby color information of the pixels (P1, P2, P3) within the reproduction gamut (RG) is preserved. Scaling factors (SFi) indicating a distance between on the one hand pixels (P1, P2, P3) of the transformed signal (RGBt) which are outside the reproduction gamut (RG), and on the other hand an edge of the reproduction gamut (RG) are determined (2).

Abstract: A system (600) for performing gamut compression or gamut extension by transforming an input color (608) of an input image defined within a first gamut (102) into a reproduction color (610) of an output image for rendering by a reproduction device capable of rendering colors within a second gamut (104) different from the first gamut. The input color has an input chromaticity (C1) and an input lightness (Z-*) together forming an input point (202) in a chromaticity-lightness plane. The reproduction color has a reproduction point (210) in the chromaticity-lightness plane, wherein an absolute difference between the input lightness and the output lightness is a decreasing function of at least the chromaticity. An absolute difference between the input chromaticity and the output chromaticity is an increasing function of at least the chromaticity.

Abstract: A display system, comprises a multi-view display panel (10) adapted to display different images to different viewers in different directions. Imaging means (16) monitors viewers within a field of view and the display output is varied in dependence on the monitoring information provided by the imaging means. The invention thus provides a display display system which captures viewer information and uses this to control the display of multiple images at appropriate respective viewing angles. This enables information to be tailored to a particular viewer's characteristics or enables a user to be tracked as they move. Thus, different viewers can have personalised information when watching different views of the same display. This provides a dynamic view allocation system.

Abstract: The apparatus (100) for enhancing at least a region of an input picture (P_in) having input pixel values enabling inter alia the reduction of quantization banding artefacts, comprises: an estimation unit (102) arranged to estimate a quantization precision (QP) of at least the region of the input picture; a pattern analysis unit (104), arranged to determine positions in the input picture of changes in input pixel value of less than or equal to the quantization precision (QP), and to output analysis information (INF_AN) representing the positions; and an adaptive filter (106), arranged to calculate an output picture (P out) corresponding to at least the region of the input picture, comprising output pixels being determined on the basis of adaptive combinations of input pixels, and arranged to determine the adaptive combinations in dependence on the analysis information.

Abstract: The invention relates to an apparatus and a method for computing an output image (145) on the basis of an input image (100). The method comprises the steps of splitting (105) the input image (100) into multiple sub-images, each sub-image comprising information from a respective frequency band of the input image (100), calculating (110) a pixel headroom signal quantifying the margin available for enhancement of pixel values of pixels in the input image (100), calculating (115) pixel enhancement factors for pixels within sub-images to be modified in dependence upon the pixel headroom signal, such that the margin as quantified by the pixel headroom signal is spread across the respective sub-images to be modified, modifying (120) the respective sub-images by using the pixel enhancement factors and the corresponding pixel values from the respective sub-images, and generating (135) the output image (145) by using the modified sub-images.