一种用于零件定位系统的亚像素边缘检测方法

介绍了基于计算机视觉的长条形杆件测量系统方案,说明在该系统中零件图像边缘提取对测量精度起着重要作用.本文在传统亚像素边缘检测方法基础上,提出垂直占空比亚像素边缘提取方法.该算法具有算法简单、效率高、边缘提取准确的特点,已成功用于长条形杆件测量系统中.     

基于小波方法提取在激光作用下电弧形态的图像边缘特征

针对小波变换的特点，设计了一种原理简单、容易实现的小波提取图像边缘的算法。通过与其它图像处理方法相结合，该算法成功提取出了激光电弧复合热源焊接时所拍摄的弧柱区的图像的水平、垂直及对角线方向的边缘特征，并与一些传统的边缘检测算子进行了比较，发现该算法在提取图像边缘时具有良好的效果。     

基于多尺度分析提取胚胎边缘的算法研究

本文提出了一种从胚胎图像中提取边缘的有效算法.该算法在小波多尺度分析的基础上,针对胚胎边缘的几何形态选择多尺度元素进行边缘提取.实验表明,该算法具有良好的胚胎边缘提取效果.     

一种改进的角点检测算法

基于SUSAN和Harris角点检测算法原理,以提高角点检测精度为目的,给出了一种改进的角点检测算法.该算法运用Harris算法进行一次检测,确定二次检测区域,在二次检测区域内运用SUSAN算法进行二次检测,通过比较两次检测结果,获取角点信息.实验结果和数据分析表明,该算法能有效降低检测误差率,检测精确度高.     

基于RBF神经网络的WO3浸出率软测量建模

针对目前在钨碱煮浸出过程中,难以实现WO3浸出率的在线检测,依据钨矿碱煮浸出过程的化学反应机理以及影响浸出率的因素,提出软测量方案,采用人工神经网络建模方法,建立简便快速检测的软测量模型.根据工业现场采集的样本数据,运用Matlab工具训练好神经网络软测量模型,结果显示该软测量模型能够反应矿物浸出过程的实际状况,测量相对误差均值小于0.5%,能满足工业生产要求.该研究为实现钨浸出率的在线检测提供了一种新的方法.     

基于RBF神经网络的WO3浸出率软测量建模

针对目前在钨碱煮浸出过程中,难以实现 WO₃ 浸出率的在线检测,依据钨矿碱煮浸出过程的化学反应机理以及影响浸出率的因素,提出软测量方案,采用人工神经网络建模方法,建立简便快速检测的软测量模型.根据工业现场采集的样本数据,运用 Matlab 工具训练好神经网络软测量模型,结果显示该软测量模型能够反应矿物浸出过程的实际状况,测量相对误差均值小于 0.5 %,能满足工业生产要求.该研究为实现钨浸出率的在线检测提供了一种新的方法.      

相位信息遥感图像边缘检测方法的实例检测分析

边缘作为高分辨率遥感图像分析的重要特征,主要用于定义高分辨率遥感图像中不同地面物体之间的边界。边缘检测作为遥感图像处理中最为重要的手段,业界已经出了许多的边缘检测方法,但在实际检测过程中面对复杂的高分辨率遥感图像,提取其边缘特征往往是较为困难的。针对该问题提出了一种利用相位信息的高分辨率遥感图像边缘检测方法,通过对遥感图像进行傅里叶变换,利用FFT得到幅度谱图;然后对频谱图像采用半径采样和角度采样进行分析,并且根据分析结果设计了二维对数Gaber滤波器;最后将傅里叶变换的结果与滤波器之间的点积进行傅立叶逆变换,从而得到遥感图像的最终检测结果,结果证明该方法较好的对高分辨率遥感图像进行了边缘特征的检测。     

基于小波变换的有色金属腐蚀图像自适应增强方法

通过对有色金属腐蚀图像的增强处理,提高对腐蚀图像的修复和识别能力,提出一种基于小波变换的有色金属腐蚀图像自适应增强算法,对采集的有色金属腐蚀图像进行腐蚀边缘轮廓特征提取预处理,采用小波变换算法进行腐蚀图像的浊点标定,结合自适应匹配滤波检测实现图像增强算法改进。仿真结果表明,采用该算法进行图像增强,能提高腐蚀金属图像输出的峰值信噪比,性能指标优于传统方法。     

基于免疫遗传形态学的视网膜光学相干断层图像边缘检测方法

提出了基于免疫遗传算法的形态学自适应结构元素生成算法,并将其用于光学相干断层成像(optical coherence tomography,OCT)图像中视网膜组织边缘检测.首先将图像进行去噪和粗分割的预处理,并将图像划分为若干子图像;其次对每一子图利用免疫遗传算法求取自适应结构元,初始随机生成固定长度的二进制数串作为抗体,并将其转化为结构元素格式,以图像二维熵定义抗体适应度,根据子图像本身结构特征信息,寻找最优抗体结构元素;最后利用寻优得到的各结构元素对子图进行形态学边缘检测,合并各子图的分割结果,实现整体图像目标边界提取.实验结果表明了该方法在图像目标边界提取的有效性.     

基于免疫遗传形态学的视网膜光学相干断层图像边缘

提出了基于免疫遗传算法的形态学自适应结构元素生成算法,并将其用于光学相干断层成像(optical coherence tomography,OCT) 图像中视网膜组织边缘检测. 首先将图像进行去噪和粗分割的预处理,并将图像划分为若干子图像; 其次对每一子图利用免疫遗传算法求取自适应结构元,初始随机生成固定长度的二进制数串作为抗体,并将其转化为结构元素格式,以图像二维熵定义抗体适应度,根据子图像本身结构特征信息,寻找最优抗体结构元素; 最后利用寻优得到的各结构元素对子图进行形态学边缘检测,合并各子图的分割结果,实现整体图像目标边界提取. 实验结果表明了该方法在图像目标边界提取的有效性.      

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.