用于DMD显示系统的运动自适应去隔行技术

介绍基于数字微镜器件数字微镜器件显示系统的去隔行技术.去隔行算法通过对帧间差别的中值滤波完成运动自适应内插.位平面数据流经脉宽调制以逐行扫描速率驱动DMD显示.扫描行视频处理器可实时完成该功能.     

基于DM8148的视频处理系统设计

设计了基于DM8148处理器的高清视频处理系统,介绍了各硬件模块的设计以及系统应用程序的编写。系统的采集模块将采集到的高清视频数据送入高清视频处理子系统。视频处理模块对视频进行去隔行、尺寸调节、添加OSD和H.264编解码算法处理,处理过的视频流经HDMI接口输出。     

基于运动补偿的视频自适应去隔行算法

针对传统的去隔行算法存在的问题,提出了一种新的基于运动补偿的视频自适应去隔行算法,主要内容包括双向块匹配运动估计、自适应参考域值设置.测试结果表明本算法能够高质量地去除视频图像的隔行效应.     

基于AVS的帧场自适应编码算法研究

介绍了中国音视频编码技术标准AVS中的帧内预测和基于宏块的帧场自适应编码技术.通过分析其中的5种帧内预测模式的空间分布特点,提出了一种新的隔行视频帧内预测模式.实验表明该模式可以在标清、高清隔行视频的帧内预测上获得平均0.24 dB以上的信噪比增益,平均减少3.1%的码流,是一种有效提高编码效率的预测模式.     

一种新的运动自适应去隔行算法

针对隔行视频,提出了一种新的运动自适应去隔行算法,该算法能充分利用图像序列时间和空间上的相关信息,采用新颖的运动检测方法区分视频序列中的运动和静止部分。对于运动部分,使用新的自适应插值算法;对于静止部分,采用行复制算法进行处理。实验表明,该算法与一些传统的去隔行算法相比,在画面视觉效果上,能达到更好的效果。     

Novel De-interlacing Algorithm Based on Motion-adaptive Detection

针对隔行视频,提出了一种新的运动自适应去隔行算法,该算法能充分利用图像序列时间和空间上的相关信息,采用新颖的运动检测方法区分视频序列中的运动和静止部分.对于运动部分,使用新的自适应插值算法;对于静止部分,采用行复制算法进行处理.实验表明,该算法与一些传统的去隔行算法相比,在画面视觉效果上,能达到更好的效果.     

一个基于运动自适应去隔行算法的视频系统

在大多数现代高端视频产品中，逐行技术被广泛应用以获得比传统隔行系统质量更高的图像。本文讨论了现有各种算法的利弊，采用了一种基于运动自适应的算法，给出了这种算法的VLSI结构实现，并在此基础上构造了整个视频系统，给出了一个实用的、高性能的逐行视频系统的实现。     

基于显示画面的ELA去隔行算法

在当前的去隔行算法中,场内去隔行法由于很好地实现了显示品质和运算成本的平衡而应用最为广泛.其中,基于边沿的线平均算法(Edge-based Line Average,ELA)由于在图像边沿部位重建方面的优异表现而为人们所熟知.文章提出了一种基于显示画面的ELA去隔行算法,其原理是将显示画面划分为面型、线型以及边沿型等3种类型,分别对它们采用本文设计的算法进行去隔行处理.实际模拟结果表明,该方法可以很好地避免边界模糊和锯齿状画面等不良现象的出现,有效降低了运算的复杂度.     

一种去隔行技术的三场自适应运动检测方法

目前仍然存在大量的模拟电视,并且在很长一段时间内,势必将与数字电视共存,因此去隔行技术在视频后处理中将起到很关键的作用.自适应运动去隔行是目前最好的一种去隔行技术,运动检测是自适应运动去隔行技术极为重要的第一步.简单介绍传统的两场检测法和三场检测法,提出一种基于三场检测、但性能比传统的两场、三场检测都优良的新的自适应运动检测方法.它既能很好的解决由于图像的边界导致的运动物体与静止物体的错误区分问题,又能很好的检测出快速运动.     

基于小波分析的视频图像修复算法

图像修复是指恢复图像中破损区域的颜色信息或者去除图像中的多余物体.针对视频图像损坏特征中较复杂的水平与垂直条带,利用视频图像时间连续性的特点,提出基于小波分析理论的修复方法.实验结果表明,该系统能够较好地恢复视频图像和有效去除文字.     

Hybrid error concealment method combining exemplar-based image inpainting and spatial interpolation

This paper proposes an efficient error concealment method for the reconstruction of pixels that are lost in video communication. The proposed method is developed by combining exemplar-based image inpainting for patch reconstruction and spatial interpolation for pixel reconstruction using adaptive threshold by local complexity. By exemplar-based image inpainting, regions with regular structures are reconstructed. For complex regions with irregular structures, just one pixel is reconstructed using the proposed spatial interpolation method. The proposed spatial interpolation method performs reconstruction by selecting adaptively directional interpolation or neighbor interpolation based on gradient information. Simulation results show that the proposed hybrid method performs reconstruction with significantly improved subjective quality compared with the previous spatial error concealment and image inpainting methods. The proposed method also gives substantial improvements of PSNR compared with the previous methods.     

基于傅里叶变换去隔行图像的动态3维面形测量

为了解决动态面形测量中隔行扫描CCD相机记录动态物体表面变形条纹图像存在缺陷的问题,提出了傅里叶变换去隔行算法,即把隔行扫描CCD获取动态物体的错位模糊帧图像分成两个单场图像,分别对每一单场图像进行傅里叶变换去隔行处理,再利用条纹分析法重建对应时刻的3维面形。理论分析得出单场傅里叶变换去隔行图像与对应的准确满帧图像相同的结论。结果表明,该方法可以很好地恢复条纹和重建物体,且简单实用,可用于基于空间相位检测、相位测量轮廓术、傅里叶变换轮廓术等条纹分析方法的动态物体3维测量中。     

Quality-efficient syntax element-based de-interlacing method for H.264-coded video sequences with various resolutions

In this paper, we propose a novel quality-efficient de-interlacing method for H.264-coded video sequences with various resolutions. In the proposed method, using the syntax elements provided in H.264 bitstreams, four new and efficient strategies are delivered for inter-coded macroblocks to improve the quality of de-interlaced video sequences as well as alleviate the error propagation side effect. Based on the real and generated interlaced video sequences with various common resolutions, experimental results demonstrate the proposed de-interlacing method achieves better quality in terms of both objective and subjective measures when compared with the recently published method by Dong and Ngan.     

High performance de-interlacing algorithm for digital television displays

In this paper, a high performance de-interlacing algorithm is proposed to reduce the artifact effects produced by interlaced scanning TV systems. In the proposed algorithm, a moving-stationary detector is presented to determine where the missing pixels belong to moving or stationary region. If the missing pixel belongs to the stationary region, the temporal-wise interpolation is adopted; otherwise, the spatial-temporal-wise interpolation is applied. In addition, the proposed algorithm has simple operations chiefly involves addition and subtraction. This simple computation conducts the proposed algorithm to real-time applications efficiently. Experimental results show that the proposed algorithm can improve the subjective and objective qualities compared with other de-interlacing algorithms.     

An inpainting-based deinterlacing method.

Video is usually acquired in interlaced format, where each image frame is composed of two image fields, each field holding same parity lines. However, many display devices require progressive video as input; also, many video processing tasks perform better on progressive material than on interlaced video. In the literature, there exist a great number of algorithms for interlaced to progressive video conversion, with a great tradeoff between the speed and quality of the results. The best algorithms in terms of image quality require motion compensation; hence, they are computationally very intensive. In this paper, we propose a novel deinterlacing algorithm based on ideas from the image inpainting arena. We view the lines to interpolate as gaps that we need to inpaint. Numerically, this is implemented using a dynamic programming procedure, which ensures a complexity of O(S), where S is the number of pixels in the image. The results obtained with our algorithm compare favorably, in terms of image quality, with state-of-the-art methods, but at a lower computational cost, since we do not need to perform motion field estimation.     

改进的邻域滤波图像修复方法

在分析了几种重要的基于滤波图像修复算法基础上,提出了一种改进的邻域滤波图像修复算法.为了减少平滑处理中的模糊,该算法根据待修复点与窗口中已知点的欧氏距离来决定相应位置的权值,然后采用邻域中已知像素的加权平均来估算待修复点的值.大量实验结果表明,改进算法修复的视觉效果和归一化均方误差(NMSE)的计算结果均明显优于先前的...     

视频格式转换资源最小FPGA解决方案

提供了对隔行数字视频进行去隔行,帧频转换,分辨率变换的最简FPGA设计方案.达到FPGA内部资源和外部RAM耗用量都为最小的目的.该方案通过一对乒乓工作的RAM将去隔行,帧频转换,分辨率变换这三项本需分级完成的处理同时实现,使得资源耗用得以最小化.其中去隔行采用场合并方式,帧频转换采用帧重复方式,分辨率变换采用均匀插值方式.     

一种块匹配的图像修复算法

在研究Criminisi算法的基础上,提出了一种新的图像修复算法。根据图像待修复点梯度的大小,在源区域中确定其匹配区域的范围,减少搜索次数;以到待修复点距离从小到大的方式搜索匹配块,应用最近最优匹配块对图像进行修复;提出新的置信度更新方法,使更新后的置信度与累积误差成反比。实验表明,本文提出的图像修复算法具有较好的图象修复效果,并且计算复杂度低,效率高。     

Performance analysis of motion-compensated de-interlacing systems.

A lot of research has been conducted on motion-compensated (MC) de-interlacing, but there are very few publications that discuss the performances of de-interlacing quantatively. The various methods are compared through their performance on known video sequences. Linear system analysis of interlaced video and de-interlacer are proposed in. It is well established that the performance of the MC methods outperform the fixed or motion-adaptive methods when the motion vectors used are reliable and true to the scene content. Being an open-loop process the performance of the MC de-interlacers degrade drastically when there are motion vector errors. In this paper, a linear system analysis of MC video upconversion systems is presented and the effects of motion vector accuracy on system performance are analyzed. We investigate the various factors that contribute to the motion vector inaccuracy, such as incorrect motion modelling, acceleration between the frames, and insufficient interpolation kernel.     

基于DVB信号的实时采集编码系统设计与实现

基于Twinhan2033 DVB-C数字电视接收卡,设计、开发了一套实时采集编码系统,实现了数字电视视音频信号的采集、解码、编码与网络传输等功能。提出了一种新的带运动检测的5点中值滤波视频去隔行算法,解决了一般中值滤波算法图像边缘不够平滑、出现锯齿等不足。最后给出了系统的应用实例,系统编码输出图像清晰,并且通过简单操作便可以制作出大量的视频节目,具有广阔的应用前景。