拼接

MIT's arachne is chosen as our assembler. Some problems about software transplant and data preparation are considered. Based on theoretic analysis and data simulation, we have found the main shortcomings of arachne.

我们选用MIT开发的arachne拼接软件作为序列拼接的平台，详细介绍了软件移植和数据准备方面的问题，通过实际结果、理论分析和数据模拟的方法，发现arachne软件拼接血吸虫基因组时存在的主要问题。

At and , we can get a univariate cubic equation in and its three roots . By the dependence of the roots and the coefficients of the equation, we can choose corresponding space points ( such that the distance is the shortest from to the point with parameters and . Thereby we can get all the data of discrete points on the cubic curve of blending surface at . Again we denote the maximum value and minimum value of planar parameter with which meets by and respectively.

利用根与系数的连续相依性，可以选相应的空间点使其距离的圆截线上对应值的点最近的两个根，从而得到处拼接曲面的截线的离散点的数据并确定出与相截的平面参数的最大最小值类似地由处拼接曲面截线的离散数据得到处的离散数据，这样可以依次计算出拼接曲面上对应所有参数点的离散点的坐标。

Generally, the main research points in this paper are as follows:Image Stitching is one of the key technology in virtual reality construction,we proposes two ambient light independent panorama mosaics methods based on feature: image stitching algorithm based on stationary wavelet decomposition and homomorphic filtering, and image stitching algorithm based on ring projection and energy function optimization.

主要研究内容如下：图像拼接是虚拟场景建模的主要技术之一，针对光照变化图像序列提出了两种基于特征的图像拼接算法：基于静态小波序贯特征匹配和同态滤波的图像拼接算法以及基于圆投影和能量函数优化的图像拼接算法。

The experimental results show that our method can process a certain obliquity, and have high efficiency. It is a novel method for raster map recognition system.?

实验结果表明该方法在地图小角度倾斜时能正确拼接，拼接方法效率高，速度快，是栅格地图识别输入系统中地图拼接的一种新方法。

It seems natural to use this idea into the parameterization of the blending surfaces of three pipe surfaces, however, the blending surface of three pipe surfaces is very complicated and the inappropriate choice of parameters can lead to singular blending surface.

将这一思想应用于三管拼接曲面的参数化是自然的，但是由于三向管道曲面的拼接曲面是是复杂的，并且由于参数选取不当可能出现三个管道曲面分别拼接于混合拼接曲面的不同分支等奇异情况，从而这一思想的实现具有现实难度。

It is virtual reality technology based on image mapping technology to produce picture truthfully.

全景图拼接技术是一种基于图像绘制技术生成真实感图形的虚拟现实技术，全景图拼接技术主要是通过对图像的拼接，实现对场景的环视。

Firstly, the key frames were extracted from the video sequence. Then, the features detected between adjacent key frames were guided and matched by motion displacement, which was calculated by the optical flow field. With the RANSAC robust estimation and cascade of homography matrix, the homography matrix of the adjacent key frame and the nonadjacent key frame was got. Finally, the seamless mosaic was rendered by image blending.

首先在同一镜头下的视频序列中提取若干关键帧，利用关键帧拼接表示序列的拼接；其次利用光流场算法计算出的运动位移量引导相邻关键帧间特征点的匹配，并结合随机抽样一致性鲁棒估计算法和单映矩阵的级联性，得到相邻关键帧、非相邻关键帧间的对应矩阵；最后通过融合实现了序列的无缝拼接。

By means of optical and digital butting,and CCD synchronization,two pieces of CCDs are parallelly butted.

通过光学拼接、数字拼接、CCD同步，使两块面阵CCD拼接成一字形。

And Finally according to theprogramed algorithms, simulation and experimental stitchings are porformed for testing thealgorithm accuracy. Results show that, the comprehensive errors of theretical andexperimental wavefront stitchings are less than 10~(-6)λand than PV/10 (where PV refering towavefront peak-to-vally value), respectively. Furthermore, experimental research isconducted on the influence of stitching accuracy by sub-aperture overlapping area andstitching modes, with subaperature real-time stitching test for large plano-optic broughtabout.

第三，对编写的算法程序进行了模拟拼接实验和实际拼接实验，测得该算法程序的精度为：理论拼接波面的综合误差小于10~(-6)λ，实际拼接波面的综合误差小于PV／10(PV为被测波面相位峰谷值)；在此基础上，又就子孔径重叠区域大小和拼接模式对拼接精度的影响进行了实验和分析，实现了大口径光学平面的子孔径实时拼接检测。

Image mosaics are very important in creating panorama and existing algorithms can not cope with ghosting and exposure difference efficiently To solve these two problems, we present a new algorithm The first step is to find a best seam line to stitch the images based on dynamic programming Then the mosaic image is created by a multiresolution metho

图像拼接在制作全景图的过程中具有重要作用，但是现有的方法不能很好地处理鬼影和曝光差异针对存在的问题，提出了一种实现图像拼接的算法首先利用动态规划的方法在要进行拼接的图像中找到一条最佳的缝合线，然后利用多分辨率技术进行拼接，解决了鬼影和曝光差

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。