共查询到18条相似文献,搜索用时 171 毫秒
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针对枪弹位置的线阵CCD测量图像信息处理问题,研究了线阵CCD在测量枪弹射击中枪弹的提取、噪声的剔除、枪弹中心的确定等问题.常用的背景差分算法在实际系统的运算过程中存在速度慢、噪声多等问题,根据线阵CCD测量系统采集到的枪弹图像信息的特点,提出了在背景差分法的基础上通过图像的一种改进的互相关性快速提取枪弹图像的算法,进而确定枪弹位置.通过比较该算法和背景差分法对枪弹图像的采集与处理,可以得出用该算法计算出的枪弹位置精确度高,耗时短,提高了线性CCD测量系统实时处理的效率,在连发的高精度自动报靶系统中具有一定的实用性. 相似文献
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为满足高精度线阵CCD二维自准直仪动态高精度测量,提出一种高精度线阵CCD二维自准直仪四狭缝目标中心的定位方法,首先采用高斯滤波对CCD图像进行平滑处理,在抑制噪声的同时生成带有高斯加权的CCD图像,然后采用线性插值质心法对加权图像进行目标中心亚像素定位.实验结果表明,该定位方法稳定性好,定位精度高且实时性强,在原理样机上,应用该方法实现了单次二维角度测量时间小于0.2 s,测量范围±900″,在±300″内相对于进口ELCOMAT3000示值误差优于±0.5″,具备工程应用价值. 相似文献
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为精确测量高精密齿轮小缺陷,提出智能视觉方法.基于机器视觉构建包含CCD面阵传感器、点视觉激光传感器及IMAQ Vision软件等,通过CCD面阵传感器、点视觉激光传感器采集小缺陷图像,用双边滤波法去除图像噪声,用遍历法选取最佳阈值,用阈值分割法二值化处理噪后图像,用IMAQ Vision软件检测二值化图像边缘.结果表明:该方法的图像采集与处理效果优越且精度较高,测量结果稳定,平均误差仅为0.001 mm,能精确测量高精密齿轮小缺陷. 相似文献
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星载线阵CCD相机是采用固体线阵电荷隅合器件(Charge Coupled Device,简称CCD)作为光电传感器的精密光学测量系统。由于CCD器件具有灵敏度高、动态范围大、分辨率高、线性好、位置精度高、寿命长等优点,所以CCD相机在卫星遥感中得到了广泛应用。 对星载线阵CCD相机而言,CCD长期稳定可靠地工作和小体积、低功耗是系统重要工作参数之一。为此,利用可编程逻辑器件这种90 相似文献
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Studies on the High Resolution DOA Estimation for UUV Based on Synthetic Aperture Technique 总被引:1,自引:0,他引:1
To increase the limited spatial processing gain of physical aperture of UUV (unmanned underwater vehicle) linear array and satisfy the demand of long distance target detection, a flank array based on the synthetic aperture technique is introduced into UUV, and a modified beam domain passive synthetic aperture processing algorithm (BDPSA) suitable for the flank array is proposed concurrently, which sums the beamforming of linear array coherently for successive measurement after phase compensation to make the beam output peak corresponding to the expected target bearing, expand the array aperture effectively and improve the resolution. The simulation of detection probability and distinguishing probability for double targets within 1, 1/2, 1/3 and 1/4 beam-width shows that the method of BDPSA has lower SNR threshold for target distinguishing, improves the detection probability and distinguishing probability under low SNR, and realizes the long-distance and high resolution bearing estimation because of the obvious improvement of the spatial array gain. 相似文献
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基于机器视觉的内外径尺寸检测系统研究 总被引:1,自引:0,他引:1
文中给出了一个能在线实时检测药柱内外径尺寸的系统。该系统采用机器视觉技术,利用面阵CCD摄像机获取图像,通过数字图像处理技术,提出了一种适于在生产线上实时检测药柱平均内外径的方法。 相似文献
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The design of experimental system of digital imaging system for control parameter is discussed in detail. Signal processing of digital CCD imaging system is first analyzed. Then the real time control of CCD driver and digital processing circuit and man-machine interaction are achieved by the design of digital CCD imaging module and control module. Experimental results indicate that the image quality of CCD experimental system makes a good response to the change of control parameters. The system gives an important base for improving image quality and the applicability of micro imaging system in complex environment. 相似文献