scispace - formally typeset
Search or ask a question
Topic

Subpixel rendering

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


Papers
More filters
Patent
Yuzo Hirayama1
13 Mar 2003
TL;DR: In this paper, a three-dimensional image display apparatus comprising a display panel, which displays a parallel projection image corresponding to a 3D image, and an array plate disposed on a front of the display panel and having pinholes arranged two-dimensionally.
Abstract: A three-dimensional image display apparatus comprising a display panel, which displays a parallel projection image corresponding to a three-dimensional image, and an array plate disposed on a front of the display panel and having pinholes arranged two-dimensionally. The display panel includes pixels arranged two-dimensionally in correspondence with the pinholes. Each of the pixels can include a first subpixel, a second subpixel, and a third subpixel. The apparatus also includes a point at which a line passing through one of the pinholes from the first subpixel intersects the three-dimensional image, a point at which a line passing through the one of the pinholes from the second subpixel intersects the three-dimensional image, and a point at which a line passing through the one of the pinholes from the third subpixel intersects the three-dimensional image being separated from one another.

22 citations

Journal ArticleDOI
TL;DR: An analogue-based approach to subpixel-level edge detection for dimension measurement and object localization that can accurately detect a peak position of the differential curve by means of the interpolating calculation is described.
Abstract: This paper describes an analogue-based approach to subpixel-level edge detection for dimension measurement and object localization. Although the most common subpixel edge detection methods employ digital-based approaches, at present they show certain drawbacks such as the difficulty of real-time, in-line subpixel edge detection, the necessity of implementing expensive high-resolution A/D converters, and difficulty in performing continuous, dynamic subpixel edge detection. These drawbacks present a difficult problem in digital-based systems industrial applications. We propose a new analogue-based first derivative subpixel edge detection approach to overcome these drawbacks. Our method involves the approximation of the distribution curve of the first derivative of the output of a CCD by using the second-order polynomial, and thus can accurately detect a peak position of the differential curve by means of the interpolating calculation, the operation of which is realized primarily through the use of analogue circuitry. The measurements of a concrete form using the prototype system demonstrate that its resolution under ideal conditions is about 1×10-1 pixels. While the resolution of this system decreases in an actual situation, the resolution remains at an acceptable subpixel level. We thereby conclude that the approach described in this paper is effective for real-time, low cost edge detection.

22 citations

Proceedings ArticleDOI
01 Jan 2006
TL;DR: An algorithm for the automatic control point localization and employ a feature-based piecewise linear registration approach is proposed and the quality of the image alignment is evaluated on a small sample of subjects, considering both alignment and localization errors.
Abstract: Dynamic infrared imaging has been proposed in literature as an interesting adjunctive technique to mammography in breast cancer diagnosis. For a correct analysis of the infrared image sequences, however, a preprocessing registration step may be fundamental. In this paper, we provide a first quantitative evaluation of the performances of registration on dynamic infrared images for this specific application. We propose an algorithm for the automatic control point localization and employ a feature-based piecewise linear registration approach. The quality of the image alignment is evaluated on a small sample of subjects, considering both alignment and localization errors. Results show that subject movement of up to five pixels is compensated, obtaining a subpixel error correction.

22 citations

Patent
24 Feb 2003
TL;DR: In this paper, a fixed format emissive display is described using a computing device having a processor and a memory, the display comprising an array of emissively pixel elements, each pixel element comprising at least two sub-pixel elements made of different materials.
Abstract: A method of designing a fixed format emissive display is described using a computing device having a processor and a memory, the display comprising an array of emissive pixel elements, each pixel element comprising at least two sub-pixel elements made of different materials. The method comprises selecting areas of the at least two sub-pixel elements so that each pixel element displays white at a predetermined white point within a certain tolerance over a lifetime of the pixel, and such that the lifetimes of the sub-pixel areas are within a predetermined tolerance of each other. A display having sub-pixel elements optimized so that each pixel element displays white at a predetermined white point within a certain tolerance over a lifetime of the pixel, and such that the lifetimes of the sub-pixel areas are within a predetermined tolerance of each other is also described.

21 citations

Journal ArticleDOI
TL;DR: A model is proposed that converts small UAV detection into a problem of predicting the residual image (i.e., background, clutter, and noise) and outperforms state-of-the-art ones in detecting real-world infrared images with heavy clutter and dim targets.
Abstract: Thermal infrared imaging possesses the ability to monitor unmanned aerial vehicles (UAVs) in both day and night conditions. However, long-range detection of the infrared UAVs often suffers from small/dim targets, heavy clutter, and noise in the complex background. The conventional local prior-based and the nonlocal prior-based methods commonly have a high false alarm rate and low detection accuracy. In this letter, we propose a model that converts small UAV detection into a problem of predicting the residual image (i.e., background, clutter, and noise). Such novel reformulation allows us to directly learn a mapping from the input infrared image to the residual image. The constructed image-to-image network integrates the global and the local dilated residual convolution blocks into the U-Net, which can capture local and contextual structure information well and fuse the features at different scales both for image reconstruction. Additionally, subpixel convolution is utilized to upscale the image and avoid image distortion during upsampling. Finally, the small UAV target image is obtained by subtracting the residual image from the input infrared image. The comparative experiments demonstrate that the proposed method outperforms state-of-the-art ones in detecting real-world infrared images with heavy clutter and dim targets.

21 citations


Network Information
Related Topics (5)
Pixel
136.5K papers, 1.5M citations
91% related
Image processing
229.9K papers, 3.5M citations
89% related
Image segmentation
79.6K papers, 1.8M citations
85% related
Convolutional neural network
74.7K papers, 2M citations
84% related
Wavelet
78K papers, 1.3M citations
82% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202387
2022209
2021120
2020179
2019189
2018263