Abstract: An auto-stereoscopic display device includes a display panel having an array of display pixels for producing a display; and a view forming unit having an array of view forming elements. Each view forming elements is configurable to focus the outputs of groups of the display pixels into views projected towards a user in different directions. The display device further includes a view deflecting unit to selectably change the directions in which the plurality of views is projected towards the user. The view deflecting unit includes at least one birefringent prism having a first refractive index for light having a first polarization direction and a second refractive index for light having a second polarization direction. The view deflecting unit further includes a polarization switch in registration with the birefringent prism for providing the birefringent prism with display light having the first or second polarization direction.

Abstract: A multiview display device displays multiple views having respective viewing angles related to an object to be displayed. The display device includes an optical device for displaying multiple viewing cones. A first cone of the multiple viewing cones has different views so that a different view is observed by a right eye and a left eye of a viewer of the multiview display device. The different views of the first cone have an angular distribution relative to the display device, where sets of image data are provided such that the angular distribution has a first part of adjacent views with increasing viewing angle and a second part of adjacent views with decreasing viewing angle. Further, the angular distribution has a first one of the views in between a maximum view which corresponds to a maximum viewing angle and a minimum view which corresponds to a minimum viewing angle.

Abstract: A method of rendering a multi-view image comprising a first output image and a second output image on basis of an input image (102) is disclosed. The method comprises: creating a modulation image (100) comprising irregular shaped objects (106-112); modulating pixel values of a portion of the input image (102) on basis of further pixel values of the modulation image (100), resulting into an intermediate image (104); and generating the multi-view image by means of warping the intermediate image on basis of the disparity data.

Abstract: A 3D video conferencing station includes a video camera for capturing video signals and a depth map calculator for creating a depth map of a user of the 3D video conferencing station. The video signals together with the depth map are transmitted as 3D video data. A stereoscopic display device displays stereo images, which are calculated on the basis of received 3D video data. The depth map which is generated by the depth map calculator is also used for estimating the position of the user in order to control the calculation of the stereo images.

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 multi-view image generation unit (100) for generating a multi-view image on basis of an input image is disclosed. The generation unit (100) comprises: edge detection means (102) for detecting an edge in the input image; depth map generation means (104) for generating a depth map for the input image on basis of the edge, a first group of elements of the depth map corresponding to the edge having a first depth value, related to a viewer of the multi-view image, and a second group of elements of the depth map corresponding to a region of the input image, being located adjacent to the edge, having a second depth value, related to the viewer of the multi-view image, the first value being less than the second value; and rendering means (106) for rendering the multi-view image on basis of the input image and the depth map.

Abstract: A display apparatus (100) for displaying an output image on basis of 3D visual information is disclosed. The display apparatus (100) comprises: first receiving means (101) for receiving a first signal (3DV) representing the 3D visual information; second receiving means (116) for receiving a second signal (P) representing positional information of a viewer of the output image, as function of time; filtering means (122) for high-pass filtering the second signal (P), resulting in a third signal (PF); rendering means (118) for rendering the output image on basis of the first signal (3DV) and the third signal (PF); and display means (112) for displaying the output image.

Abstract: A method of rendering a multi-view image comprising a first output image and a second output image on basis of an input image (102) is disclosed. The method comprises: creating a modulation image (100) comprising irregular shaped objects (106-112); modulating pixel values of a portion of the input image (102) on basis of further pixel values of the modulation image (100), resulting into an intermediate image (104); and generating the multi-view image by means of warping the intermediate image on basis of the disparity data.

Abstract: Disclosed is a visual communication signal (32) which comprises image model information (10) for generating 3-D images. The image model information (10) may comprise a 3-D image model, e.g. a 3-D wireframe model or a 3-D voxel map. Some of the generated 3-D images may have a relatively low image quality. The visual communication signal (32) further comprises image enhancement information (20) corresponding to at least part of the 3-D images for enhancing the image quality of the generated 3-D images. This image enhancement information (20) may comprise image information corresponding to one or more single viewpoints (22, 24) and/or image information corresponding to one or more ranges of viewpoints (26, 28). The visual communication signal (32) may be transmitted from a transmitter (30) to a receiver (34) in a visual communication system (40) such as a 3-D television system or a 3-D teleconferencing system. Alternatively, the visual communication signal (32) may be carried by a tangible medium, e.g.

Abstract: A display system (100) for displaying images from different data streams (1,2) simultaneously is described. Images corresponding to the first data stream (1) are shown to a first observer (106) in a vehicle and images corresponding to the second data stream (2) are shown to a second observer (108) in the vehicle. The display system (100) comprises: a display screen (102 for generating a first one of the images and a second one of the images; and an optical selection screen (104) for selectively passing the first one of the images in a first direction (101) towards the first observer (106) and passing the second one of the image second direction (103) towards the second observer (108). It is advantageously that the display screen (102) generates images both data streams (1,2).

Abstract: In block-based motion or depth estimation, a block is assigned a motion or depth value as a result of minimizing the matching error over a limited set (45) of candidate values. This set (45) usually comprises one random motion or depth value, to prevent the algorithm from stacking in local minimums. The method and system according to the invention instead add to this set (45) one motion or depth value based on properties of the image. A history of temporal changes for chosen motion or depth values is recorded, a histogram is made and a plurality of values is created in proportion to the histogram. The one added value is chosen from this plurality. Additionally, information about the direction of the changes is recorded to prevent oscillation. An apparatus for adapting a video signal (40) uses the chosen candidate values to create an enhanced version of the video signal (40).

Abstract: Disclosed is a visual communication signal (32) which comprises image model information (10) for generating 3-D images. The image model information (10) may comprise a 3-D image model, e.g. a 3-D wireframe model or a 3-D voxel map. Some of the generated 3-D images may have a relatively low image quality. The visual communication signal (32) further comprises image enhancement information (20) corresponding to at least part of the 3-D images for enhancing the image quality of the generated 3-D images. This image enhancement information (20) may comprise image information corresponding to one or more single viewpoints (22,24) and/or image information corresponding to one or more ranges of viewpoints (26,28). The visual communication signal (32) may be transmitted from a transmitter (30) to a receiver (34) in a visual communication system (40) such as a 3-D television system or a 3-D teleconferencing system. Alternatively, the visual communication signal (32) may be carried by a tangible medium, e.g.

Abstract: Most watermarking schemes are not resistant to geometric distortions of a watermarked image, because such manipulations destroy the correlation between the original watermark and the watermark in the manipulated image. In order to restore the correlation, a suspect image (Q) is analyzed (6) for the presence of a repeated data pattern. If such a pattern is found, it is concluded that the image has been watermarked by “tiling” a small-sized watermark pattern over the extent of the image. The actual detection of whether the watermark is a given watermark W is subsequently performed by determining the periodicity of the pattern found in the suspect image, and processing (9) the suspect image so as to match the periodicity of the processed image with the given periodicity of the watermark to be detected. If the suspect image indeed includes the given watermark W, the geometric manipulation is thereby undone and a conventional watermark detector (3) will signify this accordingly.

Abstract: Method and arrangement for encoding a video signal, wherein a selection (39) is made between the generation of a motion-compensated encoded video signal (I, B, P) and the generation of a higher-resolution picture (IH). The creation of the higher-resolution picture (IH) relies on estimating motion in a series of subsequent pictures (f1,2,3, . . . ) of lower resolution. The higher-resolution picture (IH) is interpolated (38) from these pictures (f1,2,3, . . . ). In a preferred embodiment of the invention, previously determined regions of interest (S(ROI)) are selected (36) from the video signal. The pictures relating to these regions of interest (f1,2,3, . . . ) occupy less memory (33) than entire pictures as picked up by an image sensor (2). A conventional picture memory (33) is sufficient to store the series of pictures (f1,2,3, . . . ) that relates to a certain region of interest. Motion estimation (31) is performed on these pictures and their motion vectors (m) are stored in a vector memory (37).

Abstract: A 3D video conferencing station (100) comprises a video camera (102) for capturing video signals and a depth map calculator (104) for creating a depth map (120) of a user (114) of the 3D video conferencing station (100). The video signals together with the depth map are transmitted as 3D video data. The 3D video conferencing station (100) further comprises a stereoscopic display device (112) for displaying stereo images, which are calculated on the basis of received 3D video data. The depth map which is generated by the depth map calculator (104) is also used for estimating the position of the user (114) in order to control the calculation of the stereo images.

Abstract: In block-based motion or depth estimation, a block is assigned a motion or depth value as a result of minimizing the matching error over a limited set (45) of candidate values. This set (45) usually comprises one random motion or depth value, to prevent the algorithm from stacking in local minimums. The method and system according to the invention instead add to this set (45) one motion or depth value based on properties of the image. A history of temporal changes for chosen motion or depth values is recorded, a histogram is made and a plurality of values is created in proportion to the histogram. The one added value is chosen from this plurality. Additionally, information about the direction of the changes is recorded to prevent oscillation. An apparatus for adapting a video signal (40) uses the chosen candidate values to create an enhanced version of the video signal (40).