摘要:
One embodiment in accordance with the invention is a video system that can include a display screen and a plurality of video capturing devices located behind the display screen. It is noted that each of the plurality of video capturing devices is for capturing a video stream through the display screen.
摘要:
One embodiment in accordance with the invention is a video system that can include a display screen and a plurality of video capturing devices located behind the display screen. It is noted that each of the plurality of video capturing devices is for capturing a video stream through the display screen.
摘要:
A method of displaying images includes performing geometric processing and photometric processing on a plurality of image frames, thereby generating a plurality of processed image frames, projecting the plurality of processed image frames on a non-planar display surface with at least one projector, wherein the geometric processing includes applying a first plurality of meshes to the plurality of image frames, wherein the first plurality of meshes defines 2D mappings between the display surface and the at least one projector.
摘要:
Current methodologies for color image halftoning produce prominent halftoning noise. Brightness variations between color dots placed at neighboring locations are a primary cause of color halftone noise. To correct this flaw, an Ink Relocation Postprocess to halftoning algorithms relocates ink drops between neighboring drop locations in order to reduce local brightness variations. Due to the intrinsic blurring side-effect of ink relocation, some enhancement may be desired. Two application-specific enhancement procedures are presented. In the first enhancement, ink relocation is suppressed in areas of fine detail. In the second enhancement, edge sharpening is performed after ink relocation.
摘要:
Error diffusion algorithms such as the celebrated Floyd Steinberg error-diffusion algorithm are high-performance halftoning methods in which quantization errors are diffused to "future" pixels. Originally intended for grayscale images, they are traditionally extended to color images by error-diffusing each of the three color planes independently (separable error-diffusion). Adding a design rule which is based on certain characteristics of human color perception to the error-diffusion paradigm results in a color halftoning algorithm having output of considerably higher quality when compared to separable error-diffusion. These benefits are achieved by adding the Minimum Brightness Variation Criterion (MBVC) to the design rules of color error-diffusion halftoning methods. Halftone values are constrained to be vertices of a Minimum Brightness Variation Quadruple (MBVQ) associated with each pixel of the color image being processed. The algorithm presented requires no additional memory and entails a reasonable increase in run-time.
摘要:
A method for real-time video communication. Specifically, one embodiment of the present invention discloses a method of video conferencing that captures a plurality of real-time video streams of a local participant from a plurality of sample viewpoints. From the plurality of video streams, a new view synthesis technique can be applied to generate a video image stream in real-time of the local participant rendered from a second location of a second participant with respect to a first location of the local participant in a coordinate space of a virtual environment. A change in either of the locations leads to the modifying of the video image stream, thereby enabling real-time video communication from the local participant to the second participant.
摘要:
A method an apparatus uses a variational approach for space dependent gamut mapping. The method presents a new measure for the problem. A solution to the formulation according to the method is unique if the gamut of the target device is known. A quadratic programming efficient numerical solution provides real-time results.
摘要:
The invention is directed towards method and apparatus for performing local color correction. One embodiment of the invention is a two-part process. The first part derives an image mask from an input image. In some embodiments, the mask is an inverted, low-pass filtered, monochrome version of the input image. The second part combines the derived mask with the input image through a non-linear operation. In some embodiments, the combination operation is a variable exponential function that has the mask values as part of its exponent and the pixel values as part of its base.
摘要:
A system and method for generating texture information. Specifically, a method provides for extensive coverage of an object using virtual cameras. The method begins by tracking a moveable object in a reference coordinate system. By tracking the moveable object, an object based coordinate system that is tied to the object can be determined. The method continues by collecting at least one replacement image from at least one video sequence of the object to form a subset of replacement images of the object. The video sequence of the object is acquired from at least one reference viewpoint, wherein the reference viewpoint is fixed in the reference coordinate system but moves around the object in the object based coordinate system. The subset of replacement images is stored for subsequent incorporation into a rendered view of the object.
摘要:
An input image represented by a set of input pixel values is color-corrected by locally modifying the input pixel values according to pixel neighborhoods; and determining an output image having a set of output pixel values. Each set of output pixel values equals a non-linear combination of a set of input pixel values and its corresponding set of modified pixel values.