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Subpixel rendering

About: Subpixel rendering is a research topic. Over the lifetime, 3885 publications have been published within this topic receiving 82789 citations.


Papers
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Journal ArticleDOI
TL;DR: It is demonstrated that the generalized smoothing consistently reduces the errors and even attains second-order convergence with resolution when discretizing discontinuous materials ininite-difference time-domain methods.
Abstract: Finite-difference time-domain methods suffer from reduced accuracy when discretizing discontinuous materials. We previously showed that accuracy can be significantly improved by using subpixel smoothing of the isotropic dielectric function, but only if the smoothing scheme is properly designed. Using recent developments in perturbation theory that were applied to spectral methods, we extend this idea to anisotropic media and demonstrate that the generalized smoothing consistently reduces the errors and even attains second-order convergence with resolution.

61 citations

Proceedings ArticleDOI
21 Nov 1995
TL;DR: In this article, the authors compare two classes of algorithms for estimating subpixel, rigid-body translation between two images: optical flow and block matching, and show that these two algorithms are equivalent for subpixel displacements.
Abstract: We compare two classes of algorithms for estimating subpixel, rigid-body translation between two images. One class is based on optical flow. Optical flow algorithms determine translations between images from estimates of spatial and temporal derivatives of brightness. The other class is based on block matching. Block matching algorithms determine translations between images by minimizing the difference between shifted (warped) versions of the original images. We show that these two classes of algorithms are equivalent for subpixel displacements. Specifically, we show that all block matching algorithms that use bilinear interpolation can be recast into equivalent optical flow formulations, and that all algorithms based on optical flow using first-order derivative estimators can be recast into equivalent block matching formulations.

61 citations

Journal ArticleDOI
TL;DR: A high fidelity Kinect IR and depth image predictor and simulator that models the physics of the transmitter/receiver system, unique IR dot pattern, disparity/depth processing technology, and random intensity speckle and IR noise in the detectors is proposed.
Abstract: With the emergence of the Microsoft Kinect sensor, many developer communities and research groups have found countless uses and have already published a wide variety of papers that utilize the raw depth images for their specific goals. New methods and applications that use the device generally require an appropriately large ensemble of data sets with accompanying ground truth for testing purposes, as well as accurate models that account for the various systematic and stochastic contributors to Kinect errors. Current error models, however, overlook the intermediate infrared (IR) images that directly contribute to noisy depth estimates. We, therefore, propose a high fidelity Kinect IR and depth image predictor and simulator that models the physics of the transmitter/receiver system, unique IR dot pattern, disparity/depth processing technology, and random intensity speckle and IR noise in the detectors. The model accounts for important characteristics of Kinect’s stereo triangulation system, including depth shadowing, IR dot splitting, spreading, and occlusions, correlation-based disparity estimation between windows of measured and reference IR images, and subpixel refinement. Results show that the simulator accurately produces axial depth error from imaged flat surfaces with various tilt angles, as well as the bias and standard lateral error of an object’s horizontal and vertical edge.

61 citations

Patent
Un-Cheol Sung1, Beohm-Rock Choi1
01 Apr 2009
TL;DR: In this article, the authors described an organic light emitting device that includes a blue subpixel that is larger than a red subpixel and a green subpixel, and the green and red subpixels have the same layered structure such that the red and green subpixels are formed by using the same shadow mask.
Abstract: The present invention relates to an organic light emitting device, and the organic light emitting device according to an exemplary embodiment of the present invention includes a blue subpixel that is larger than a red subpixel and a green subpixel. The red subpixel and the green subpixel have the same layered structure such that the red subpixel and the green subpixel are formed by using the same shadow mask.

61 citations

Patent
20 Feb 2004
TL;DR: In this article, various imaging processing techniques are disclosed for displaying a pre-subpixel rendered image, which can be transmitted directly to a display capable of displaying a subpixel rendered image.
Abstract: Various imaging processing techniques are disclosed for displaying a pre-subpixel rendered image. The pre-subpixel rendered image can be transmitted directly to a display capable of displaying a subpixel rendered image. The pre-subpixel rendered image can also be stored for later transmission for output to the display. Additionally, the pre-subpixel rendered image can be embedded in an image data stream and later extracted and displayed. Furthermore, various techniques have been disclosed to embed and extract the pre-subpixel rendered image.

61 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202387
2022209
2021120
2020179
2019189
2018263