Abstract: Disclosed herein is a system for generating a virtual view by each of one or more viewer nodes, the system comprising: a plurality of source nodes, wherein each source node is a source of a 3D data stream; a plurality of intermediate nodes, wherein each intermediate node is arranged to receive a 3D data stream from one or more of the source nodes and to generate a virtual 3D data stream in dependence on each received 3D data stream; and one or more viewer nodes, wherein each viewer node is arranged to receive a virtual 3D data stream from each of one or more intermediate nodes and to generate a virtual view in dependence on each received virtual 3D data stream.

Abstract: A portable survey meter for measuring radiation, the portable survey meter comprising: a radiation detector configured to perform measurements of radiation; a range sensor configured to measure range data of distances from the portable survey meter to real world structures in at least two dimensions; and a processing unit configured to align the measured range data with reference range data so as to determine an instantaneous position of the portable survey meter in at least two dimensions relative to the real world structures as a fixed frame of reference, whereby each measurement is performed at a known position.

Abstract: A portable survey meter for measuring radiation, the portable survey meter comprising: a radiation detector configured to perform measurements of radiation; a range sensor configured to measure range data of distances from the portable survey meter to real world structures in at least two dimensions; and a processing unit configured to align the measured range data with reference range data so as to determine an instantaneous position of the portable survey meter in at least two dimensions relative to the real world structures as a fixed frame of reference, whereby each measurement is performed at a known position.

Abstract: A radiation imaging apparatus comprising: an optical imaging device configured to image real world structures; a position and orientation detector configured to determine an instantaneous position and orientation of the radiation imaging apparatus in six degrees of freedom relative to the real world structures as a fixed frame of reference; a radiation detector configured to detect ionising radiation; a radiation source determination section configured to determine a distribution of radiation sources based on data of the ionising radiation detected by the radiation detector combined with data of the position and orientation of the radiation imaging apparatus relative to the real world structures; and an image generator configured to generate data for a combined image comprising an optical image of the real world structures imaged by the optical imaging device and an overlay image representing the distribution of radiation sources based on data from the radiation source determination section.

Abstract: A radiation imaging apparatus comprising: a radiation detector; a field modulator that modulates the radiation that reaches the detector and is defined by a transmission function; a scanner system for changing the pose of at least the field modulator; and an image reconstruction section that receives a radiation reading from the radiation detector for each of a plurality of angular orientations of the field modulator, and is configured to process the received readings to derive an image representing the amount of radiation originating from each point in an image domain, wherein the transmission function of the field modulator comprises a low transmission region that attenuates radiation incident toward the detector from angular directions defined by that low transmission region, and a high transmission region that transmits to the detector radiation that is incident toward the detector from angular directions defined by that high transmission region, wherein said regions are arranged such that: for each incid

Abstract: An aerial survey video processing apparatus for analyzing aerial survey video. The apparatus includes a feature tracking section adapted to associate identified features with items in a list of features being tracked, based on a predicted location of the features being tracked. The tracking section updates the list of features being tracked with the location of the associated identified features.

Abstract: A radiation imaging apparatus comprising: a radiation detector; a field modulator that modulates the radiation that reaches the detector and is defined by a transmission function; a scanner system for changing the pose of at least the field modulator; and an image reconstruction section that receives a radiation reading from the radiation detector for each of a plurality of angular orientations of the field modulator, and is configured to process the received readings to derive an image representing the amount of radiation originating from each point in an image domain, wherein the transmission function of the field modulator comprises a low transmission region that attenuates radiation incident toward the detector from angular directions defined by that low transmission region, and a high transmission region that transmits to the detector radiation that is incident toward the detector from angular directions defined by that high transmission region, wherein said regions are arranged such that: for each incid

Abstract: An aerial imaging array including at least two imaging devices provided on a mount attachable to an aircraft, such that the imaging devices view downwards. Each imaging device has a field of view, and the imaging devices are arranged such that there is a gap between adjacent fields of view. Each imaging device has an image frame, and each image frame has a vertical centerline and a transverse centerline. The imaging devices are posed within the mount such that the projections of the vertical centerlines onto a horizontal plane are substantially parallel. The gap between adjacent fields of view is at least a quarter of the width of the smaller of the adjacent fields of view, and the viewing directions of imaging devices providing adjacent fields of view are less than 20 degrees apart.

Abstract: A height measurement apparatus measures the height of an object visible in a plurality of non-synchronous aerial images captured from a moving platform. The apparatus includes an identification section adapted to identify an object in each of a pair of images comprising first and second images. A motion compensation section is adapted to calculate a motion-compensated location of the object in the second image. An effective-synchronous displacement calculation section is adapted to calculate the effective-synchronous displacement of the object as the displacement with respect to the background between the motion-compensated location of the object in the second image and the location of the object in the first image. A height calculation section is adapted to calculate the height of the object using the effective synchronous displacement, the altitude of the platform, and the distance travelled by the platform between capturing the pair of images.

Abstract: An aerial survey video processing apparatus for analyzing aerial survey video. The apparatus includes a feature tracking section adapted to associate identified features with items in a list of features being tracked, based on a predicted location of the features being tracked. The tracking section updates the list of features being tracked with the location of the associated identified features.

Abstract: A method of determining the distribution of radioactive material within a region is described. A plurality of radiological measurements and associated geometrical measurements taken at a plurality of positions in said region are input to a computer system. A 3D model of structures within said region is defined and the position within the model of each radiation measurement is obtained by using the geometrical measurements. The radiological measurements are then ascribed to a distribution of sources restricted to defined locations in the 3D model. The source distribution is parameterized over the defined source locations, and each parameter is related to the calculated observable radiation field, calculated using a physical model, at each measurement position. The parameters are adjusted to optimize the correspondence between the actual radiological measurements and the calculated observable radiation field, to yield the distribution of radioactive material as defined by the adjusted parameters.

Abstract: A method of determining the distribution of radioactive material within a region is described. A plurality of radiological measurements and associated geometrical measurements taken at a plurality of positions in said region are input to a computer system. A 3D model of structures within said region is defined and the position within the model of each radiation measurement is obtained by using the geometrical measurements. The radiological measurements are then ascribed to a distribution of sources restricted to defined locations in the 3D model. The source distribution is parameterised over the defined source locations, and each parameter is related to the calculated observable radiation field, calculated using a physical model, at each measurement position.