In this paper , firstly , three - dimensional geometrical models of the target and ir flares are established and by using the software vega missile attacking process is real - time simulated visually . secondly , the ir radiation characteristic of the target , background and the ir flares are analyzed , in which the wave radiation of the sun at different time , wind speed , the relative humidity and ir radiation attenuation characteristic of the atmosphere is under consideration . from above the ir image of the target , ir flare and the background are got and then are normalized to gray color image that will be showed in a child window in real time 本文通过三维建模工具creator建立目标、背景和干扰的三维模型，再通过视景仿真软件vega生成载机、导弹和目标飞机的可见光场景图像，实时地对导弹攻击工程进行可视化仿真；并分析了目标、背景和干扰的红外辐射特性，计算出传感器路径上大气衰减等等，将经过衰减的目标、背景和干扰的辐射强度量化为灰度图，以子窗口形式实时显示；进一步可以使目标和干扰按照各自的运动轨迹运动，便可产生动态的红外热图像序列。
Based on the above , the paper analyses the echo model of sar moving target and the impact that caused by the velocity of moving target in sar image with imaging theory . then the paper gives the intensity image of the real part of the echo for both static and moving targets , and the paper gives their imaging picture generated by r - d algorithm as well 在此基础上,本文推导出了运动点目标的回波模型,并结合成像原理分析了运动目标速度对sar图像的影响,最后给出了静、动目标回波的实部灰度图及其r - d算法成像图,并进行了分析和比较。
From the point cloud surfaces , multi - layered geometry images are created which can represent the original models accurately very much . the compounded geometry image representation of point cloud surfaces , is also based on the former transform method , where the difference lies : take one of coordinates as the gray value and another two as location respectively , three different geometry images can be created . three gray images are combined into a compounded color image 点云曲面的复合图象表示方法，首先把点云曲面中点的笛卡尔坐转换为球面极坐标，分别把球面极坐标[ r ， ， ]中的一个坐标转换为象素的灰度值，另外两个量转换为该象素的坐标，这样就可以得到三幅不同的图象，把这三幅灰度图象分别对应到彩色图象的r ， g ， b中去，就组合成为一幅复合彩色图象。
In the last part , the whole course of the measurement is advanced . chapter three introduced some knowledge of digital image processing , including palette , grayscale and dib , but mainly talk about the structure of the bmp file . also we mainly introduced image transform method that we often use 第三步介绍了数字图像处理的基本知识，包括调色板，灰度图，设备无关位图( dib )等，并主要介绍了bmp文件的结构；以及图像处理中常用的一四川大学硕士论文些操作原理，例如滤波、二值化等等。
Its center frequency was the range from low frequency to high frequency , its orientation is 6 and scale is 4 . gary image was directly transformed by these wavelet filters , the feature of extracting gray image target was denoted by the coefficients of gabor wavelet transform and its standard variance , the wavelet feature was input to the improved bp neural networks to classify 滤波器的中心频率是一个从低到高的范围，滤波器采用6方向， 4尺度，对灰度图象直接进行小波变换，用gabor小波变换系数的模的平均值和其标准方差来表示抽取的灰度图象目标的纹理特征，最后，把获得的小波特征输入到改进的bp神经网络分类器进行分类识别。
