流动颗粒显微图像测量技术研究

针对显微环境下流动颗粒测量的需要,构建了测量平台,研制了基于MEMS 工艺的测量器件。在分析流动颗粒显微图像特征的基础上,提出了基于颗粒运动特性的图像 测量流程,其中提出了基于基准桢差分的目标提取算法,解决了流动颗粒目标分割的问题, 根据图像运动模糊的退化模型,研究了图像模糊恢复的问题。最后以润滑油中的磨损颗粒为 例,验证了该文的分析方法对流动颗粒检测的有效性。     

基于模糊集理论鉴别运动模糊参数

运动模糊是降质图像中常见的一种形式,运动模糊图像的恢复主要依靠对运动模糊参数的估计。提出了一种新的算法来估计线性运动模糊参数。该算法利用Radon变换找到运动模糊图像的方向,通过运用模糊理论中的t-norm调整得到模糊尺度。实验结果表明,该算法在鲁棒性和精确性上均有很大提高且即使在信噪比比较低的情况下仍然可以得到很好的恢复效果。     

Novel 120‐Hz TFT‐LCD motion‐blur‐reduction technology with integrated motion‐compensated frame‐interpolation timing controller

Abstract— Samsung has developed a high‐resolution full‐HD (1920 × 1080) 120‐Hz LCD‐TV panel using a novel pixel structure and a motion‐compensated frame‐interpolation (McFi) single‐chip solution. Our latest work includes launch of a 70‐in. full‐HD panel, the world's largest LCD TV in mass production, with a 120‐Hz frame rate. A serious problem involving the charging time margin has been completely overcome through the use of a new alternative 1G‐2D pixel structure and a new driving scheme. Compared with conventional dot‐inversion driving, our new dot‐inversion method, which is a spatial averaging technique, can save power because the column drivers are operated using vertical inversion driving. In addition, McFi, which merges individual ME/MC and timing‐controller (TCON) ICs and memories, has been developed and applied in a mass‐production product for the first time ever. The McFi solution provides 120‐Hz driving with the lowest possible system cost. Motion‐picture response time (MPRT) has been reduced from 1 5 to 8 msec. Moreover, for the case of 24‐Hz film source mode, motion judder has been completely eliminated. As a result, a lineup consisting of 40‐, 46‐, 52‐, 70‐, and 82‐in. LCD‐TV panels with high quality and manufacturability has been made possible.     

Motion‐blur characterization with simulation method for mobile LCDs

Abstract— A simulation method based on measured liquid‐crystal responses and human‐vision properties was proposed to characterize the motion blur of LCDs. A perceptual experiment was implemented to validate the simulation model within different viewing conditions by changing the visual angle. The results indicate that the smaller visual angle of the mobile display has no statistic significant effect on smooth‐pursuit eye tracking when perceiving a moving block on a screen. The calculation process of quantitative metric was presented based on the measured light behavior and the simulation model. In the end, the different motion‐blur reduction approaches were evaluated for mobile LCDs.     

航天三线阵光学遥感成像运动模糊建模与分析

为了提高立体摄影测量的精度,对航天三线阵光学遥感成像的运动模糊模型进行推导和分析。根据引起运动模糊的方式,将三线阵光学遥感成像运动模糊分为前向运动模糊和姿态运动模糊。利用坐标系旋转来研究三线阵相机曝光瞬间前向飞行和姿态变化对运动模糊的影响,对俯仰、滚转和偏航姿态运动引起的模糊分别进行建模。仿真实验表明:(1)曝光瞬间航天三线阵遥感成像运动模糊是空间变化的,俯仰和滚转比偏航运动对三线阵相机的影响更严重;(2)对于直视线阵CCD而言,偏航引起的运动模糊可以忽略不计,但是对前视和后视线阵CCD的影响不能忽略;(3)航天三线阵相机的前视和后视线阵CCD比直视线阵CCD更容易受到航天器姿态运动的影响。     

基于边缘分离的去振铃复原

针对模糊图像复原后常常存在的振铃现象,提出了一种基于边缘分离的去振铃复原方法。该方法首先使用基于图像质量评价的降晰函数辨识方法估计模糊图像的降晰函数尺寸,提取模糊图像中的强边缘并平滑边缘区域得到去边缘模糊图像。然后,利用估计降晰函数对去边缘模糊图像进行迭代盲复原。最后,提取边缘增强后加入到复原的去边缘图像中得到完整的复原图像,并对复原图像进行增强。复原过程中为了抑制噪声放大使用了Wiener和离散小波变换(DWT)联合去噪算法对图像的低频区域进行去噪。实验结果表明:与传统的迭代复原算法相比,本算法复原图像的振铃测度降低了34%以上,比基于Fuzzy滤波器的去振铃算法低12.5%以上;同时,本算法复原的图像质量也得到了明显提升。     

气动光学效輿降晰函数辨识与图像复原

提出对气动光学效应降晰函数进行建模，选择“误差一参数分析法”进行降晰函数辨识，利用所建模型对试验图像进行图像复原，图像信噪比获得提高，复原效果明显。研究表明，对气动光学效应图像进行降晰函数辨识，可以有效地应用于气动光学效应的图像复原。     

基于神经网络的油罐故障模糊诊断系统

根据油罐故障现象分析，建立了油罐故障诊断模型。采用模糊数学和BP神经网络结合的算法对此诊断模型进行求解，并对模型的有效性进行了分析。     

Dynamic gamma: Application to LCD motion‐blur reduction

Abstract— A metric, “dynamic gamma,” to quantitatively evaluate the dynamic temporal response of an LCD device is proposed. Dynamic gamma, associated with 2‐D plots, is more suitable for quantitatively characterizing the dynamic characteristics of an LC panel. The dynamic gamma metric was applied to improve the temporal response of LCDs. From dynamic gamma data, overdrive tables can be derived. Dynamic gamma can also be used to evaluate the effectiveness of overdrive. With a second‐order dynamic gamma, the performance of different overdrive algorithms can be quantitatively assessed. The dynamic gamma metric was also applied to backlight flashing and developed a time adaptive overdrive algorithm. The new algorithm reduces the ghosting artifact due to the timing mismatch between LCD driving and backlight flashing. Experimental results from a simulated tracking camera confirms the advantages of the new algorithm designed using dynamic gamma.     

"显示器无处不在"--介绍2004年IDW大会上的三篇报告

要从2004年12月在日本新滹举行的国际显示大会（IDW04）上发表的458篇论文中拿出相当数量的一小部分来讨论是一件难事，因此我们在这里仅仅集中讨论其中三篇文章里所提出的议题。