Abstract: A plenoptic camera has a moveable micro-lens array in optical registration with an image sensor. A first prime mover displaces the micro-lens array synchronized with a frame rate for the camera to obtain multi-resolution of a scene. A second prime mover displaces the image sensor to increase color sampling.

Abstract: There are several types of plenoptic devices and camera arrays available on the market, and all these light field acquisition devices have their proprietary file format. However, there is no standard supporting the acquisition and transmission of multi-dimensional information. It is interesting to obtain information related to a correspondence between pixels of a sensor of said optical acquisition system and an object space of said optical acquisition system. Indeed, knowing which portion of the object space of an optical acquisition system a pixel belonging to the sensor of said optical acquisition system is sensing enables the improvement of signal processing operations. The notion of pixel beam, which represents a volume occupied by a set of rays of light in an object space of an optical system of a camera along with a compact format for storing such information is thus introduce.

Abstract: A method of performing depth estimation, the method comprising: estimating, at a higher spatial resolution of images, a global disparity map based on disparity between corresponding pixels of a stereo disparity map obtained from images forming a stereo image set associated with a passive depth estimation technique and an active depth map associated with an active depth estimation technique, wherein the disparity is estimated within a restricted range determined based on a disparity previously estimated between a stereo disparity map and an active depth map corresponding to a lower spatial resolution of the said images and map.

Abstract: A plenoptic camera is proposed having a color filter array positioned on an image sensor with an array of pixels, the color filter array having a first filter with a set of unit elements, each unit element covering M×M pixels of the image sensor, with M an integer such that M?2. The plenoptic camera further includes a set of micro-lens, each micro-lens delivering a micro-lens image on the image sensor with a diameter equal to p=k×M, with k being an integer greater than or equal to two.

Abstract: A plenoptic camera having a camera lens, a microlens array and a photosensors array is described. An optical device is arranged before the camera lens according to a light-traveling direction of a light flux entering the plenoptic camera. The optical device includes a first layer that is controllable between a transmissive mode and a scattering mode and at least one light source arranged at a border of the optical device. A method for controlling the plenoptic camera is also described.

Abstract: A light-field capture device including a photo-sensor, a main lens configured to refract light from a scene towards an image focal field, a micro-lens array positioned in the image focal field between the main lens and the photo-sensor, each micro-lens being configured to project a micro-lens image onto a respective dedicated area of the photo-sensor. The light-field capture device is provided with at least one compressive sensing calculation unit connected to at least one of the dedicated areas and configured to calculate data such as for example standard deviation data representative of the homogeneity of input pixels of said dedicated area, and to provide output data representative of the input pixels of said dedicated area; the output data comprising either a number of output pixels corresponding to the number of input pixels, or a single output pixel, depending on the relative value of the homoegeneity compared with a threshold.

Abstract: A method for obtaining a refocused image from 4D raw light field data for a given focus plane value g is described. The method is executed by an electronic device and is remarkable in that it comprises determining at least one pixel value, for at least one color component, of the refocused image at coordinates (k, l)?N2. The at least one projected pixel value with coordinates comprised in a neighborhood of said coordinates (k, l), for the at least one color component is determined, weighted and updated.

Abstract: A method for obtaining a refocused image from a 4D raw light field data for a given focus (zfocus) is described. The method is remarkable in that it comprises applying a shift correction parameter on shifted and summed images from said 4D raw light field data, the shifted and summed images being defined as a function of the given focus (zfocus), and the shift correction parameter (?) including, for at least a part of pixels of at least two sub-aperture images derived from at least one 4D light field data of a test-chart image, determined shifts for pixels belonging to the part of pixels between the at least two sub-aperture images, the test-chart image comprising patterns adequate to compute disparities between the sub-apertures images.

Abstract: A method for obtaining light field data of a scene from a sequence of images of the scene, each image being captured at a different viewpoint using a non-light-field image capture device is described. The method includes obtaining a reference image of the scene at a reference viewpoint, an interest area of the scene being included in the reference image and a reference position (x0,y0) being associated with the interest area in a reference local coordinate system of the capture device.

Abstract: A method and an apparatus for generating lens-related metadata for a light field imaging device. An image renderer generates a display image from a light field capture using a lens model. A metadata assembler then outputs parameters of the lens model used for generating the display image as lens-related metadata for the light field imaging device.

Abstract: In one embodiment, it is proposed an auto-stereoscopic display device comprising a display panel configured to deliver n different images views, with n a integer greater or equal to two; and an optical filter which is configured to control diffusion directions of said n different images views. The auto-stereoscopic display device is remarkable in that it comprises opaque materials positioned in said display panel in such way that a content indicating a direction that a user should follow in order to be in a correct sweet spot, is delivered on an edge of different views, when said display panel is on.

Abstract: A method for generating an adapted slice image from a focal stack of refocused images using an all-in-focus image derived from the focal stack comprises: selecting a slice image in the focal stack; selecting at least one object in the all-in-focus image to be focused in the adapted slice image; and generating the adapted slice image by combining the selected at least one object in the all-in-focus image onto the selected slice image.

Abstract: A plenoptic camera comprising a camera lens, a lenslet array comprising a plurality of microlenses and a photosensor array. In order to determine reference pixels of sub-images, the camera lens comprises a light emitting device arranged in the aperture stop plane of the camera lens, the light emitting device lighting the photosensor array.

Abstract: Method and apparatus for estimating the depth of focused plenoptic data are suggested. The method includes: estimating the inherent shift of in-focus pixels of the focused plenoptic data; calculating a level of homogeneity of the pixels of the focused plenoptic data; determining the pixels of the focused plenoptic data which either have disparities equal to the inherent shift or belong to homogeneous areas, as a function of the level of homogeneity of the pixels of the focused plenoptic data; and estimating the depth of the focused plenoptic data by a disparity estimation without considering the determined pixels. According to the disclosure, the pixels of the focused plenoptic data which either have a disparity equal to the inherent shift or belong to a homogeneous area will not be considered for the estimation of the depth, which can reduce computational costs and at the same time increase accuracy of estimations for in-focus parts of the scene.

Abstract: The disclosure relates to a visual data processing device and a visual data processing method. The device is used for displaying visual data for a terminal. The device comprises: a module configured to obtaining a three-dimensional position of the terminal with respect to a reference point on a user of the terminal; a module configured to determining, in relation to said three-dimensional position of the terminal, a subset of three-dimensional visual data to be displayed from the point of view of the reference point, in function of a set of available visual data; a module configured to modifying said subset of three-dimensional visual data to be displayed, delivering modified visual data; a module configured to displaying, on a displaying module of the terminal, the modified visual data.

Abstract: In one embodiment, it is proposed a method for obtaining at least one high dynamic range image via aligning and fusion of at least two low dynamic range images. The method is remarkable in that it comprises: obtaining a first low dynamic range image, said first low dynamic range image comprising several color components in a color space; obtaining a second low dynamic range image in said color space, comprising, for at least one component color, at least a part of pixels of said second low dynamic range image, defining a region, for which Euclidean distance between a value of a pixel in said region in said second low dynamic range image and a value of a corresponding pixel in said region in said first low dynamic range image is below a threshold; and said aligning comprising matching features obtained from said at least one component color of said first low dynamic range image and from said at least one component color of said second low dynamic range image.

Abstract: The device comprises an aperture stop disc divided into a plurality of mutually exclusive filtering segments comprising a first, a second and a third filtering segment ; the third filtering segment is adapted to pass a third portion of the spectrum which is included in the portion of the spectrum passing the first and second filtering segments. Due to third filtering segment, the aperture assigned to the color component corresponding to the third portion of the spectrum—preferably blue—is larger than the aperture assigned to the color component corresponding to the portion of the spectrum passing the first and second filtering segments.

Abstract: The invention concerns a method and a device for inserting 3D graphic animation in a 3D image, each 3D graphic element of the graphic animation being defined in size and in depth for the insertion in a determined insertion zone of said 3D image. The method comprises the step of determining for the graphic element to be inserted a depth range with a maximum allowed depth value, replacing the out of range depth values by the maximum allowed depth value when depth values of the graphic element are out of range and compensating the depth difference between the depth values of the graphic element and the maximal allowed depth value in reducing the graphic element in size proportionally to the reduction of depth for the graphic element.

Abstract: A method for hierarchical disparity estimation on an image pair, wherein image pyramids are created by successively downscaling each image of the image pair, and an apparatus configured to perform the method are described. An initial disparity estimator applies a full search on a highest level of the image pyramids to determine initial disparity estimates, the highest level having the lowest resolution. A disparity propagator passes the initial disparity estimates to a next lower level of the image pyramids. An allocator then partitions the pixels of each remaining hierarchy level of the image pyramids into two or more groups of pixels, where each pixel in a group of pixels can be processed independently from remaining pixels of that group of pixels. A disparity estimator estimates disparity values for the pixels of a first group of pixels utilizing disparity estimates from a next higher level of the image pyramids.

Abstract: The invention relates to three dimensional video imaging, in which at least a left view and a right view of a moving scene are produced and a map of disparities is produced for all pixels of the successive images of a video sequence.