Subpixel rendering

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

Display apparatus with pixels having subpixel regions

Abstract: A display apparatus has pixels arranged along rows and columns in which each pixel is defined by a pair of opposed electrodes. The pixels are provided by sub-pixels with color filters of different colors wherein integral light quantities of the same color sub-pixels of adjacent pixels are different. The display apparatus is capable of selecting a first display operation in which a single pixel is displayed as one display unit, as well as a second display operation in which at least two adjacent pixels are combined to form one display unit.

Angular subpixel rendering multiview display using shifted multibeam elements

Abstract: Multiview displays include a backlight and a screen used to form a plurality of multiview pixels Each multiview pixel includes a plurality of sets of light valves The backlight includes a light source optically coupled to a plate light guide configured with a plurality of multibeam elements Each multibeam element corresponds to a set of light valves and is spatially offset with respect to a center of the set of light valves toward a center of the multiview pixel The plurality of multibeam elements are also configured to couple out light from the plate light guide with different angles and angular offsets such that at least a portion of the coupled-out light beams interleave and propagate in different view directions of the multiview display

Conductive film, display device provided with same, and method for evaluating conductive film

Abstract: A conductive film is such that, when a display unit is one in which subpixel shapes regarding two colors differing from each other are different, subpixel layout pattern cycles of each color are different, or the center of gravity of one subpixel in one pixel exists at a position differing from a line linking the centers of gravity of remaining other subpixels, a wiring pattern is such that, in the frequency and intensity of moire per color respectively calculated from the peak frequency and peak intensity of the two-dimensional Fourier spectrum of each of the transmittance image data of the wiring pattern and the luminosity image data of the subpixel layout pattern of each color, a moire evaluation index calculated from a moire evaluation value obtained by having the visual response characteristic of a human being act, in accordance with an observation distance, upon moire intensity at a frequency of each moire less than or equal to the maximum frequency of moire defined in accordance with the display resolution of the display unit is less than or equal to a prescribed value.

Illumination-Robust Subpixel Fourier-Based Image Correlation Methods Based on Phase Congruency

Abstract: The Fourier-based image correlation technique has been widely concerned due to its accuracy, efficiency, and robustness to image contrast and brightness. Accordingly, a variety of subpixel methods have been proposed. However, the detailed subpixel-level influence of the complicated radiometric variations has yet to be investigated, and few corresponding improvements have been made. This paper presents a novel illumination-robust subpixel Fourier-based image correlation method based on phase congruency. Both the magnitude and orientation information of the phase congruency features are adopted to construct a structural image representation. The image representation is then embedded into the correlation scheme of the subpixel methods, either by linear phase estimation in the frequency domain or by kernel fitting in the spatial domain, achieving two improved subpixel methods. The proposed methods integrate the advantages of the structural image representation and the original correlation scheme, and make full use of both global and local phase information to achieve illumination-robust correlation. Experiments undertaken with both simulated and real radiometric differences were carried out with ground-truth subpixel shifts. The performances of the proposed methods and the other state-of-the-art subpixel Fourier-based correlation methods were evaluated and compared. The experimental results indicate that the proposed methods outperform the other methods in the presence of diverse radiometric variations, in both accuracy and robustness.

A New Spatial Attraction Model for Improving Subpixel Land Cover Classification

Abstract: Subpixel mapping (SPM) is a technique that produces hard classification maps at a spatial resolution finer than that of the input images produced when handling mixed pixels. Existing spatial attraction model (SAM) techniques have been proven to be an effective SPM method. The techniques mostly differ in the way in which they compute the spatial attraction, for example, from the surrounding pixels in the subpixel/pixel spatial attraction model (SPSAM), from the subpixels within the surrounding pixels in the modified SPSAM (MSPSAM), or from the subpixels within the surrounding pixels and the touching subpixels within the central pixel in the mixed spatial attraction model (MSAM). However, they have a number of common defects, such as a lack of consideration of the attraction from subpixels within the central pixel and the unequal treatment of attraction from surrounding subpixels of the same distance. In order to overcome these defects, this study proposed an improved SAM (ISAM) for SPM. ISAM estimates the attraction value of the current subpixel at the center of a moving window from all subpixels within the window, and moves the window one subpixel per step. Experimental results from both Landsat and MODIS imagery have proven that ISAM, when compared with other SAMs, can improve SPM accuracies and is a more efficient SPM technique than MSPSAM and MSAM.