Patent application number | Description | Published |
20100309304 | Method and Device for the Reconstruction of the Shape of an Object from a Sequence of Sectional Images of Said Object - A method of reconstructing the volume of an object from a sequence of section images, the images corresponding to different positions and/or orientations of an acquisition plane and being subject to uncertainties, the method comprising:
| 12-09-2010 |
20110037831 | METHOD FOR DETERMINING A THREE-DIMENSIONAL REPRESENTATION OF AN OBJECT USING POINTS, AND CORRESPONDING COMPUTER PROGRAM AND IMAGING SYSTEM - The method of the invention includes: determining a set of points of a space and a value of each of these points at a given moment, the set of points including the points of the object in the position thereof at the given moment; selecting a three-dimensional representation function that can be parameterized with parameters and an operation that gives, using the three-dimensional representation function, a function for estimating the value of each point in the space; and determining parameters, such that, for each point in the set, the estimation of the value of the point substantially gives the value of the point. | 02-17-2011 |
20110064271 | METHOD FOR DETERMINING A THREE-DIMENSIONAL REPRESENTATION OF AN OBJECT USING A SEQUENCE OF CROSS-SECTION IMAGES, COMPUTER PROGRAM PRODUCT, AND CORRESPONDING METHOD FOR ANALYZING AN OBJECT AND IMAGING SYSTEM - The method comprises, for each cross-section image, determining the position of the object (O) in relation to the cross-section plane at the moment the cross-section image is captured, and determining a three-dimensional representation (V) of the object (O) using cross-section images (X | 03-17-2011 |
Patent application number | Description | Published |
20080240540 | APPEARANCE MANIFOLDS FOR MODELING TIME-VARIANT APPEARANCE OF MATERIALS - A method for modeling a time-variant appearance of a material is described. A sample analysis of a material sample is performed, wherein the sample analysis orders surface points of the material sample with respect to weathering from data captured at a single instant in time. An appearance synthesis using the sample analysis is performed, wherein the appearance synthesis generates a time-variant sequence of frames for weathering an object. | 10-02-2008 |
20090219287 | Modeling and rendering of heterogeneous translucent materials using the diffusion equation - An exemplary method includes providing image data for an illuminated physical sample of a heterogeneous translucent material, determining one or more material properties of the material based in part on a diffusion equation where one of the material properties is a diffusion coefficient for diffusion of radiation in the material and where the determining includes a regularization term for the diffusion coefficient, mapping the one or more material properties to a virtual object volume, assigning virtual illumination conditions to the virtual object volume, and rendering the virtual object volume using the virtual illumination conditions as a boundary condition for a system of diffusion equations of the virtual object volume. Other methods, devices and systems are also disclosed. | 09-03-2009 |
20100277477 | Modeling Anisotropic Surface Reflectance with Microfacet Synthesis - Described is a search technology in which spatially varying anisotropic reflectance is modeled using image data captured from a single view. Reflectance at each point is represented using a microfacet-based Bidirectional Reflectance Distribution Function (BRDF). Modeling processes the image data, which provides a partial normal distribution function (NDF) for each surface point. The NDF at each selected point is completed by texture synthesis using similar, overlapping partial NDFs from other points. Also described is a scanning device that illuminates a sample surface from a two-dimensional set of light directions using a linear array of LEDs moved over a flat sample. | 11-04-2010 |
20110157192 | Parallel Block Compression With a GPU - Disclosed is a system and method for determining, in parallel on a graphics processing unit, a block compression case which results in a least error to a block. Once determined, the block compression case may be used to compress the block. | 06-30-2011 |
20110267619 | CAPTURING REFLECTED LIGHT FROM A SAMPLING SURFACE - A mechanism is disclosed for capturing reflected rays from a surface. A first and second lens aligned along a same optical center axis are configured so that a beam of light collimated parallel to the lens center axis directed to a first side, is converged toward the lens center axis on a second side. A first light beam source between the first and second lenses directs a light beam toward the first lens parallel to the optical center axis. Second light beam source(s) on the second side of the first lens, direct a light beam toward a focal plane of the first lens at a desired angle. An image capturing component, at the second side of the second lens, has an image capture surface directed toward the second lens to capture images of the light reflected from a sample capture surface at the focal plane of the first lens. | 11-03-2011 |
20110304745 | LIGHT TRANSPORT RECONSTRUCTION FROM SPARSELY CAPTURED IMAGES - A “Scene Re-Lighter” provides various techniques for using an automatically reconstructed light transport matrix derived from a sparse sampling of images to provide various combinations of complex light transport effects in images, including caustics, complex occlusions, inter-reflections, subsurface scattering, etc. More specifically, the Scene Re-Lighter reconstructs the light transport matrix from a relatively small number of acquired images using a “Kernel Nyström” based technique adapted for low rank matrices constructed from sparsely sampled images. A “light transport kernel” is incorporated into the Nyström method to exploit nonlinear coherence in the light transport matrix. Further, an adaptive process is used to efficiently capture the sparsely sampled images from a scene. The Scene Re-Lighter is capable of achieving good reconstruction of the light transport matrix with only few hundred images to produce high quality relighting results. Further, the Scene Re-Lighter is also effective for modeling scenes with complex lighting effects and occlusions. | 12-15-2011 |
20120268637 | CAPTURING REFLECTED LIGHT FROM A SAMPLING SURFACE - A mechanism is disclosed for capturing reflected rays from a surface. A first and second lens aligned along a same optical center axis are configured so that a beam of light collimated parallel to the lens center axis directed to a first side, is converged toward the lens center axis on a second side. A first light beam source between the first and second lenses directs a light beam toward the first lens parallel to the optical center axis. Second light beam source(s) on the second side of the first lens, direct a light beam toward a focal plane of the first lens at a desired angle. An image capturing component, at the second side of the second lens, has an image capture surface directed toward the second lens to capture images of the light reflected from a sample capture surface at the focal plane of the first lens. | 10-25-2012 |
20120306878 | Modeling and Rendering of Heterogeneous Translucent Materals Using The Diffusion Equation - An exemplary method includes providing image data for an illuminated physical sample of a heterogeneous translucent material, determining one or more material properties of the material based in part on a diffusion equation where one of the material properties is a diffusion coefficient for diffusion of radiation in the material and where the determining includes a regularization term for the diffusion coefficient, mapping the one or more material properties to a virtual object volume, assigning virtual illumination conditions to the virtual object volume, and rendering the virtual object volume using the virtual illumination conditions as a boundary condition for a system of diffusion equations of the virtual object volume. Other methods, devices and systems are also disclosed. | 12-06-2012 |
20130093883 | Obtaining Spatially Varying Bidirectional Reflectance Distribution Function - A system for reflectance acquisition of a target includes a light source, an image capture device, and a reflectance reference chart. The reflectance reference chart is fixed relative to the target. The light source provides a uniform band of light across at least a dimension of the target. The image capture device is configured and positioned to encompass at least a portion of the target and at least a portion of the reflectance reference chart within a field-of-view of the image capture device. The image capture device captures a sequence of images of the target and the reflectance reference chart during a scan thereof. Reflectance responses are calculated for the pixels in the sequence of images. Reference reflectance response distribution functions are matched to the calculated reflectance responses, and an image of the target is reconstructed based at least in part on the matched reference reflectance response distribution functions. | 04-18-2013 |
20130335434 | RENDERING GLOBAL LIGHT TRANSPORT IN REAL-TIME USING MACHINE LEARNING - Some implementations disclosed herein provide techniques and arrangements to render global light transport in real-time or near real-time. For example, in a pre-computation stage, a first computing device may render points of surfaces (e.g., using multiple light bounces and the like). Attributes for each of the points may be determined. A plurality of machine learning algorithms may be trained using particular attributes from the attributes. For example, a first machine learning algorithm may be trained using a first portion of the attributes and a second machine learning algorithm may be trained using a second portion of the attributes. The trained machine learning algorithms may be used by a second computing device to render components (e.g., diffuse and specular components) of indirect shading in real-time. | 12-19-2013 |
20150193967 | RENDERING GLOBAL LIGHT TRANSPORT IN REAL-TIME USING MACHINE LEARNING - Some implementations disclosed herein provide techniques and arrangements to render global light transport in real-time or near real-time. For example, in a pre-computation stage, a first computing device may render points of surfaces (e.g., using multiple light bounces and the like). Attributes for each of the points may be determined. A plurality of machine learning algorithms may be trained using particular attributes from the attributes. For example, a first machine learning algorithm may be trained using a first portion of the attributes and a second machine learning algorithm may be trained using a second portion of the attributes. The trained machine learning algorithms may be used by a second computing device to render components (e.g., diffuse and specular components) of indirect shading in real-time. | 07-09-2015 |