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卫星数字化影像输出技术及其应用效果 总被引:1,自引:0,他引:1
随着数码成像技术的发展,卫星影像图制作过程中由于光学镜头产生的几何畸变,图像边缘模糊等图像失真问题得到根本解决,可显著提高卫星图像的清晰度和几何精度;而美国圣保利克公司生产的Light-Jet-5000RS型激光数码成像仪是目前国际上图像精度最高的图像输出设备,可获得较满意的卫星图像,本文扼要介绍了其成像原理,技术参数和实际应用效果。 相似文献
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3D打印过程中激光点温度对成型制品的精度和质量会产生直接影响。针对传统温度检测装置在激光点温度检测方面无法达到高检测率、低误差率的工业需求,文章提出一种基于卷积神经网络对激光点温度进行检测估计方法。采用深度学习方法,对收集到的激光温度训练样本运用卷积神经网络的方法进行模型训练,利用训练结果对测试集进行预测,估计出测试激光图像的激光温度。此外在传统卷积神经网络的基础上进行了改进,验证结果表明改进的卷积神经网络能够对激光点等温线进行更为准确的检测估计。 相似文献
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激光光斑图像的光斑中心定位是激光位移检测中的关键技术之一.为提高桥梁挠度测量系统的实时性能,本文针对测量中激光光斑图像的特点,提出了一种确定光斑中心位置的方法.利用激光图像中光斑区域与其它区域亮度差别较大的特点,确定亮度阈值并将光斑图像进行二值化处理,得到一幅仅有激光光斑的图像,根据圆上平行弦的中点连线通过圆心的原理,通过求弦的中点确定圆心.本方法原理简单,计算量小,计算速度快,能够满足测量系统的实时性要求,已在测量实验中取得了较好的效果. 相似文献
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英国Sherwood公司最近开发成功一种全新的激光感应涂料,用于制作纸盒、纸箱等外包装的“虚拟标签”。据称,这种产品当用二氧化碳激光点击时,会发生简单的颜色变化,产生稳定的高清晰图像。通常情况下,激光被安装在包装生产线上,用于多变的信息领域,如日期和条形码。 相似文献
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随着电子计算机的发展和广泛应用,影像技术完成了从图像模拟到图像数字化的飞跃,从传统的光学系统(镜头)成像发展到计算机绘图和计算机动画。计算机绘图是利用电子束扫描将图像形成在荧光屏上。随着激光和激光技术的发展,与电子计算机相结合,形成一种新型的影像技术——激光演示技术,利用高亮度的激光束,通过激光扫描在屏幕或银幕上形成所要求的图像。 相似文献
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Architectural construction has experienced considerable improvements via the recent developments of colored self-consolidating mortars (C-SCM). It is significantly important to prevent strength reduction in colored mortars when aiming at specific color intensities. In this research, the effects of phthalocyanine and iron hydroxide pigments on SCM and SBR latex modified SCM (LM-SCM) were studied. The influence of using pre-milled colored paste was investigated, as well. Experiments included tests on compressive strength, compressive toughness, flexural strength and flexural toughness. It was found that incorporating SBR latex to C-SCM mix design improved flexural properties and color intensity but decreased purity and led to porosity augmentation. Results also indicated that using pre-milled colored paste considerably improved mechanical properties, color intensity and purity and decreased porosity. Preparing pre-milled colored paste was found as an effective way to use low contents of organic pigments to create brilliant, intense and uniform colors in cement-based materials. 相似文献
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自着色聚酯色素的合成与性质 总被引:1,自引:0,他引:1
用对苯二甲酸二甲酯、乙二醇和带有-OH、-NH2等活性基团的染料和颜料为聚合单体,通过熔融缩聚法合成了几种自着色聚酯色素,测定了聚酯色素中色素的含量,并对合成过程和聚酯色素的性质进行了研究。结果表明,染料和颜料的结构与用量对聚酯色素的合成和有重要的影响。 相似文献
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目的 河南古建筑彩画艺术是黄河流域中原文化的重要组成部分,河南古建筑彩画艺术在家居产品设计中的转译应用研究,是对古建彩画艺术在日常生活语境下活化传承的路径探索,也是对家居产品设计手法的拓展,有助于营造中国式家居风格氛围,引领人们认识与弘扬中国传统住宅家居文化。方法 搜集河南古建筑彩画相关资料并整理分类,总结和提炼其代表性符号元素,解析符号元素中的文化因子,并对文化因子在现代家居产品设计中的应用方法进行讨论,即廓清古建筑彩画艺术中的“结构”因子、“形”因子、“色彩”因子和“语义”因子,运用碱基运算法,对各类因子进行再结合,构建完整的家居产品设计新模式。结论 通过对河南古建筑彩画艺术元素与符号特征的再设计,将河南古建筑彩画艺术与家居产品设计结合,使其符合当代消费者需求的商品属性,提升其文化附加值,为家居产品的多元化发展路径做出探索。 相似文献
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溶胶-凝胶法制备环保型彩色玻璃 总被引:2,自引:0,他引:2
通过溶胶-凝胶法制备了掺杂有生物染色剂的SiO2彩色溶胶,利用提拉法在普通玻璃上镀膜,制得了均匀透明,颜色鲜亮,可回收利用的彩色玻璃.彩色玻璃在可见光部分的透射率可通过改变薄膜的厚度或溶胶中染料的浓度而进行调控.运用光谱分析法研究了彩色玻璃的耐磨损、耐刮擦、耐腐蚀和抗紫外线等实际耐用性能. 相似文献
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Photo acoustic drug delivery is a technique for localized drug delivery by laser-induced hydrodynamic pressure following cavitation bubble expansion and collapse. Photoacoustic drug delivery was investigated on gelatin-based thrombus models with planar and cylindrical geometries by use of one microsecond laser pulses. Solutions of a hydrophobic dye in mineral oil permitted monitoring of delivered colored oil into clear gelatin-based thrombus models. Cavitation bubble development and photoacoustic drug delivery were visualized with flash photography. This study demonstrated that cavitation is the governing mechanism for photoacoustic drug delivery, and the deepest penetration of colored oil in gels followed the bubble collapse. Spatial distribution measurements revealed that colored oil could be driven a few millimeters into the gels in both axial and radial directions, and the penetration was less than 500 μm when the gelatin structure was not fractured. 相似文献
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用红外透射率分析方法研究了氧化镍薄膜在原始、致色和消化的红外透射率光谱,用X-射线衍射方法测量了在KOH和LiClO4-PC电解液中致色和消色时,氧化镍多晶薄膜在(111)和(200)方向衍射峰位的移动,分析了注入离子种类和离子注入位置,认为在KOH电解液中致色时,注入离子为OH,离子的注入位置在晶普的间界。在LiClO4-PC电解液中,Li^+离子的注入位置同样在晶粒的间界。 相似文献
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ZnO films codoped with Al and N have been prepared by radio frequency magnetron sputtering in an Ar atmosphere, using targets of mixtures of ZnO and AlN powders. The Al-doped ZnO films are transparent, whereas the films codoped with Al and N are colored. The Al- and N-concentrations in the colored films are estimated to be 4–7 at.% and 1–2 at.%, respectively. No enhancement of the carrier density is seen in the colored ZnO films, whereas the colored films exhibit lower etching rates of 3–5 nm/s in a 0.1 M HCl solution, in comparison with the Al-doped ZnO films. For the colored film, the anisotropic grain growth occurs, and cubic grains are produced after etching. The low etching rates of the colored films are ascribed to the epitaxial growth of AlN films on the surfaces of ZnO grains, rather than the incorporation of Al–N and Al–O bonds into the ZnO lattice. 相似文献
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The charged polymer nanoparticles of poly(methyl methacrylate-co-ethylene glycol dimethacrylate) were prepared by emulsifier-free emulsion copolymerization and aminolysis. Coloring on the nanoparticles was achieved by high temperature-assisted disperse dyeing. In the presence of a charge control and stabilizing agent, the colored PMMA nanoparticles showed the electrophoretic mobility because of the amine groups on their surfaces. The morphology and material characteristics of the colored polymeric nanospheres were also investigated. 相似文献
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基于介质上电润湿的透射式显示器件 总被引:2,自引:0,他引:2
提出了一种基于介质上电润湿效应的新型透射式显示单元结构,它由夹在带有透明电极的两块玻璃板间的有色油滴和水组成,其中一个电极表面涂覆有疏水性介质层.通过改变两个电极间的外加电势,能够调节油滴对介质层的覆盖面积,从而控制显示单元的“开”、“关”状态.制作了具有该种单元结构的4×3显示阵列样机,并给出了初步的测试结果. 相似文献