In stereoscopic display, view synthesis is a key technology to realize interactivity what is the ability to look around within a three dimensional (3D) scene by freely choosing a viewpoint. This paper presents an inte...
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ISBN:
(纸本)9787561752289
In stereoscopic display, view synthesis is a key technology to realize interactivity what is the ability to look around within a three dimensional (3D) scene by freely choosing a viewpoint. This paper presents an intermediate view synthesis algorithm , combining view interpolation with view morphing based on image mosaic. Firstly, the original stereo image pairs are normalized. Then, the disparity of only object area is estimated by a predict recursion method to improve the matching speed and accuracy. Afterward, credible areas in left and right views should be determined and chosen to create a transitional view. At last, a method combining view interpolation and morphing is used to synthesis the intermediate view from the transitional view. Experimental results show that the edge of created intermediate view object is clear and smooth, and the processing speed of view synthesis is obviously improved. This algorithm can be used in interactive stereoscopic display in varius 3D video application which an arbitrary view needs to be rendered in real-time.
Camera calibration is a key technology in computer field, in which self-calibration is to compute camera intrinsic parameters only from a series of images. The Kruppa's equations method not only needs to compute t...
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ISBN:
(纸本)9787561752289
Camera calibration is a key technology in computer field, in which self-calibration is to compute camera intrinsic parameters only from a series of images. The Kruppa's equations method not only needs to compute the fundamental matrix which includes all of the geometry relation between images, but also needs to compute the epipoles which variate with the different images. Hartley deduced a simple form of Kruppa's equations in terms of fundamental matrix. The goal of this paper is to convert the equations into the form of cost function according to the Hartley's deduction and calculate the cost function by the sum of fundamental matrixes multiplying the corresponding weighting factors that are related with the proportion of the number of matching features to the image pixels. In this paper, the genetic optimal algorithms are used to achieve the minimum value of the cost function. Our algorithm doesn't require computing the image epipole and avoiding the results instability, and is easy for the calculation. Experimental results show that the proposed algorithm is more effective and accurate, and can become a versatile tool for camera calibration, it will be used in our cameras array calibration.
In this paper, a novel plane-sweep based depth reconstruction method for depth image-based rendering is presented. Unlike depth from stereo and image-based visual hull techniques, our method further develops the plane...
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ISBN:
(纸本)9787561752289
In this paper, a novel plane-sweep based depth reconstruction method for depth image-based rendering is presented. Unlike depth from stereo and image-based visual hull techniques, our method further develops the plane-sweeping algorithm, and extends it to synthesize "virtual" views of a real-world scene associated with depth information without any prior geometric information. When projecting the input images into the parallel "virtual depth planes" , a dynamic scoring method to compute the color consistency is introduced. In addition, for building a photorealistic "virtual" view, we present a view-direction based weighting strategy for depth image-based rendering. An important advantage of our approach is that due to more accurate depth information, better novel views can be acquired.
Image-Based Rendering (IBR) techniques, which have been considered to be an efficient way of generating novel views from a series of original views, have received much attention in recent ten years. Compared with othe...
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ISBN:
(纸本)9787561752289
Image-Based Rendering (IBR) techniques, which have been considered to be an efficient way of generating novel views from a series of original views, have received much attention in recent ten years. Compared with other IBR techniques, Depth-Image-Based Rendering (DIBR) techniques need less reference images as the depth information is also used. As a key technology in advanced Three-Dimensional Television (3D-TV) system[5] , DIBR has a promising perspective. In this paper, a depth image based rendering system is proposed, different from the DIBR techniques used in advanced 3DTV, our method focus on generating an arbitrary new view instead of a virtual left view or right view. We first use an edge dependent filter to smooth the sharp changes in depth image so as to reduce the big holes. Then we do 3D Image Warping using the known calibration parameters. In order to deal with the visibility problem quickly, we process the pixels of the original images in an occlusion-compatible order [10]. Thirdly, we merge two generated images to eliminate the big holes in desired view. Finally we fill in the remaining holes with an interpolation method. Experimental results have show that the proposed method can provided a satisfactory image quality.
Organic thin film transistors (OTFTs) with modified gate insulator were demonstrated in this paper. The modified gate insulator layers consisted of SiO 2 as the gate insulator and OTS ( octadecyltrichlorosilane ) or ...
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Organic thin film transistors (OTFTs) with modified gate insulator were demonstrated in this paper. The modified gate insulator layers consisted of SiO 2 as the gate insulator and OTS ( octadecyltrichlorosilane ) or PMMA (Poly(methyl methacylate)) as the modified layer. The devices with the modified layer had field-effect mobility larger than 10 -3 cm 2 /Vs, which was twice than that of the OTFT without modification. The on/off current ratio was increased one order of magnitude and reached more than 10 4 . The leakage current was decreased from 10 -9 A to 10 -10 A. The results demonstrate that using modified gate insulators can obviously improve the performance of the OTFTs.
We investigate the video transmission efficiency of channel code, modulation mode and layered space time code for region of interest video transmission system. Excellent channel code achieves more coding gains, suitab...
We investigate the video transmission efficiency of channel code, modulation mode and layered space time code for region of interest video transmission system. Excellent channel code achieves more coding gains, suitable modulation mode adaptively overcomes different channel fading and layered space time code achieves not only coding gain but only diversity gain. Based on the above analysis, we propose an adaptive video transmission system according to channel environment and video constructed quality require. We derive an analytic bound for the error probability, and conduct experiments for H.264 interest of region video streaming. It is shown that the proposed system enhances the PSNR performance of region of interest significantly by adaptive choice of channel code, modulation mode, and layered space time code in the wireless channel.
This paper describes a novel drive method of TFT-LCD for high gray scale display. The method is based on mix-control of voltage DAC and advanced sub-frame modulation. The low-bit gray scale is driven by the DAC while ...
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ISBN:
(纸本)9787561752289
This paper describes a novel drive method of TFT-LCD for high gray scale display. The method is based on mix-control of voltage DAC and advanced sub-frame modulation. The low-bit gray scale is driven by the DAC while the high-bit gray scale is generated by applying advanced sub-frame modulation. This method is applied to a 1024 * 768 dots RGB TFT-LCD panel which can display 256-level gray scale.
LCD display solution always contains three main parts: controller, source driver and gate driver, which is commonly designed separately in large-sized panel, but integrated on single chip for medium-sized or small, su...
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ISBN:
(纸本)9787561752289
LCD display solution always contains three main parts: controller, source driver and gate driver, which is commonly designed separately in large-sized panel, but integrated on single chip for medium-sized or small, such as digital cellular phones and small PDAs. This paper describes a high-speed GRAM (Graphics RAM) supporting 1-chip solution for TFT-LCD panel, which capacity is 132(width) × l76(length) × 16(RGB) bits, storing 65k-color image, which read access time is 546 ps.
Top-emitting organic light-emitting devices (TOLEDs) using a thin MoO x film deposited on a thick Ag as the reflective anode and LiF/Al/Ag as the semitransparent cathode are demonstrated. The hole injection of Ag anod...
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ISBN:
(纸本)9787561752289
Top-emitting organic light-emitting devices (TOLEDs) using a thin MoO x film deposited on a thick Ag as the reflective anode and LiF/Al/Ag as the semitransparent cathode are demonstrated. The hole injection of Ag anode can be significantly improved with surface modification using a MoOx thin film. For microcavity TOLEDs, optical length pay important role in determing the efficiency and color of the devices. By changing the optical length, the cavity resonance can be tuned to be consistent with the peak wavelength of spontaneous emission. In this way, the optimized efficiency is obtained. With Alq3 as the emitting layer, the optimized TOLEDs with MoOx as hole injection layer shows a tune-on voltage of 2. 68 V and a maximum current efficiency of 7.44 cd/A, which are much better than those (3.37 V, 4.67 cd/A) obtained from the conventional OLED. The good performance of TOLED is attributed to the efficient hole injection from the Ag/MoOx anode as well as the optimized microcavity effect.
Gray scale is one of the most important parameters to judge the display quality of Flat Panel display (FPD). The widely used technique to control the FPD's gray scales nowadays is Pulse Width Modulation (PWM) and ...
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ISBN:
(纸本)9787561752289
Gray scale is one of the most important parameters to judge the display quality of Flat Panel display (FPD). The widely used technique to control the FPD's gray scales nowadays is Pulse Width Modulation (PWM) and Sub-frame, which orderly scan display pixels by row, column and frame to obtain the gray scale display. It results in lots of time waste in the scanning process. This paper dissertates the construction of the space-time mapping topology architecture that cast grayscale matrix in space to a gray-scale scanning space-time plane. By the construction, it presents a new optimized gray scale control method which based on scanning by bit and parallel Sub-frame transmission. The method proposed in this paper aims at the time redundancy which commonly exists in the FPD imaging process, and break through the traditional imaging method by decomposing one plane into multi-planes. Based on this novel idea and the construction of the scanning space-time mapping topology architecture, a Box Insert Model is proposed in the paper. The theoretic model have significant meaning to solve the bottle problem of transfer speed from memory space to display plane, and provide a new way of enhancing scan efficiency and reducing refresh frequency.
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