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101.
102.
提出了一种新型基于计算机图像自动识别的接触网零部件悬挂状态检测算法。它与之前的人工肉眼图像判断和传统人工巡检相比,具有检测精度高、检测速度快、环境适应力强等优点。 相似文献
103.
遥感信息技术及其在高精度可视化导航工程中的应用 总被引:1,自引:0,他引:1
关惠平 《兰州交通大学学报》2006,25(1):4-7
遥感信息技术是一项集现代高新技术于大成的复杂系统工程.在概要介绍了遥感信息技术基础上,通过高分辨率遥感影像在高精度可视化导航工程中的直接应用,探讨了遥感信息技术在相关领域应用的重大意义. 相似文献
104.
Image Segmentation Using an Improved Watershed Algorithm 总被引:1,自引:0,他引:1
IntroductionOne of the firstand mostimportantoperationsin image analysis and computervision is image seg-mentation.The aim of image segmentation is thedomain- independent partition of the image into aset of regions,which are visually distinct and uni-form… 相似文献
105.
A New Region-of-interest Coding Method to Control the Relative Quality of Progressive Decoded Images 总被引:1,自引:0,他引:1
Based on the ideas of controlling relative quality and rearranging bitplanes, a new ROI coding method for JPEG2000 was proposed, which shifts and rearranges bitplanes in units of bitplane groups. It can code arbitrary shaped ROI without shape coding, and reserve almost arbitrary percent of background information. It also can control the relative quality of progressive decoded images. In addition, it is easy to be implemented and has low computational cost. 相似文献
106.
This paper presented a new-type CNC curve grinding machine, in order to conquer the disadvantages of conventional NC curve grinding machine and improve surface quality, dimensional accuracy and machining efficiency. The new-type grinder adopts some high and new technologies: ① the normal tracing device could make grinding wheel coincide with the normal direction of the machining points in work piece, and improve surface quality and dimensional accuracy; ② the digital image on-line recognition system could monitor machining process and compensate wheel wear in real time; ③ linear motor drive mechanism could realize the exact adjustment of the grinding head digitally and increase the machining efficiency. The math models of normal tracing and circular tolerance zone were presented. The experimental results show that the new-type CNC curve grinding machine equipped with the three devices mentioned above is easy to realize the precision grinding of any complex curve, and improve surface quality, dimensional accuracy and machining efficiency. 相似文献
107.
为实现对地学信息单元的自动识别和分类,对地学信息单元的几何形状特征的提取及量测方法进行了研究,利用数学形态学方法实现对遥感图像的半自动提取地学信息单元的图形边缘.分别提取图形的面积、周长、面积周长比、形状参数、分形分维数等5个直观易测且具有判别意义的特征参数.利用这5个特征采用判别分析方法实现对地学信息单元的识别分类,并取得了较理想的结果和准确率. 相似文献
108.
GLOBAL MEASURE ON IMAGE CONTENT 总被引:1,自引:0,他引:1
李介谷 《上海交通大学学报(英文版)》2000,5(2)
IntroductionContent- based image retrieval has been proposedto allow retrieval to be performed on the basis ofa variety of aspects of image content[1] .A chal-lenging problem arises with many imagedatabases,within which queries are posed via vi-sual or pictorial examples.A common visualquery to an image database system would involvefinding all images in the database which containa subimage that is similar to the query image.Such retrievals must be based on embedded con-tent features,such as sh… 相似文献
109.
针对目前沥青混合料自动检测的要求,借助于数字图像处理技术,给出最大方差理论在沥青混合料智能检测与参数提取中的应用,可为实现沥青混合料自动检测与分析奠定良好的基础。 相似文献
110.
ZHANGJing LIUQun BaikunthNath 《船舶与海洋工程学报》2004,3(1):71-74
lmage segment is a primat.‘y step in image analysis of unexploded ordnance (UXO) detection by ground penetrating radar (GPR) sensor which is accompanied with a lot of noises and other elements that affect the recognition of real target size. In this paper we bring forward a new theory, that is, we look the weight sets as target vector sets which is the new cues in semi-automatic segmentation to form the final image segmentation. The experiment results show that the measure size of target with our method is much smaller than the size with other methods and close to the real size of target. 相似文献