Subpixel rendering

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

Apparatus and method for adaptively rendering subpixel

Abstract: A rendering apparatus and method in a light field display may determine positions of eyes of a user, may determine a subpixel emitting a ray that enters the eyes, based on the positions of the eyes, among a plurality of subpixels forming a three-dimensional (3D) pixel, and may display a stereoscopic image on the light field display based on a pixel value of the determined subpixel.

Method and device for the three-dimensional representation of information

Abstract: The invention relates to an autostereoscopic method and a device for the three-dimensional representation of information according to a barrier-, lenticular-, prismatic masking- or similar method by means of flat-panel displays (liquid crystal, plasma, electroluminescent or other displays), for use in computer and video technology, games and advertisements, medical technology, virtual reality applications and other areas. According to the invention, the image points are proportionally displaced to follow the lateral movement of an observer by shifting, for each coloured subpixel, the intensity of the coloured subpixels to horizontally adjacent coloured subpixels. This method can be used with known devices. It becomes especially useful wehn, for each image point, n+1 adjacent coloured subpixels are triggered. Observers moving sideways continue to see the picture in almost consistently high quality.

Color display device

Abstract: PROBLEM TO BE SOLVED: To prevent a so-called horizontal shadow generating in a display device having pixels containing even-numbered subpixels. SOLUTION: A scan signal line drive circuit 12 and a data signal line drive circuit 13 drive a pixel array 14 by dot inversion driving. A-type pixels having four sub-pixels arranged in a sequence of white subpixel, red subpixel, green subpixel and blue subpixel, and B-type pixels having four subpixels arranged in a sequence of red subpixel, white subpixel, blue subpixel and green subpixel are alternately arranged in each row of the pixel array 14. Upon performing monochromatic display, a positive voltage and a negative voltage are equally imparted to the same kinds of subpixels in one row, which prevents generation of a horizontal shadow. A similar system is employed in a device having pixels containing white subpixels, cyan subpixels, magenta subpixels and yellow subpixels. COPYRIGHT: (C)2008,JPO&INPIT

Recent Results in Precision Measurements of Edges, Angles, Areas and Perimeters

Abstract: This paper presents recent results in precision measurements using computer vision. An edge operator based on two-dimensional spatial moments is used. This operator can locate correctly modeled edges to hundredths of a pixel. This accuracy is unaffected by additive or multiplicative changes to the data values. The precision is achieved by correcting for many of the deterministic errors caused by non-ideal edge profiles using a look-up table to correct the original estimates of edge orientation and location. This table is generated using a synthesized edge which is located at various subpixel locations and various orientations. The edge locator is then used to estimate area and perimeter of imaged objects. Area and perimeter are also measured using averages of estimates from binary images generated by thresholding at many gray values. This method of threshold decomposition is compared to the edge detection methods. The application of these techniques to measurement of imaged machined metal parts is also presented.

Subpixel localization of synthetic references in digital images by use of an augmented template

Abstract: A new method is presented for the localization of synthetic references (SRs) in digital images based on normalized correlation. An augmented search template is used, which consists not only of occupied pixel fractions of the desired SR, but also of derivatives of these fractions with respects to shifts along the image axes. The resulting correlation values are higher than those based on standard correlation, especially for small SRs and unfavorable subpixel displacements between the template and the scene. The augmented template can also be used to determine the location of the SR to subpixel accuracy. The precision of this determination is affected less by systematic and random error than is the case for centroiding or sampled correlation interpolation, and can be estimated explicitly from the calculated correlation value. Numerical examples are given.