排序方式: 共有64条查询结果,搜索用时 15 毫秒
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编码曝光方法是基于扩频技术的思想,通过对快门的编码将传统的快门频谱扩展到更宽的频带上,保留更多图像的频域信息,方便图像信号的恢复。提出了一种基于光纤陀螺振动探测和编码曝光的颤振模糊图像复原方法,介绍了编码曝光和颤振探测的基本理论,实现最优编码码字的选取。利用光纤陀螺进行颤振轨迹探测,并使用统计的方法估计点扩展函数(PSF),将复杂的几何计算问题转化为简单的统计问题,降低运算复杂度,提高运算速度。提出的方法主要用于复原由卫星平台颤振引起的遥感成像模糊,实验结果表明,该方法能够实现快速的复原,对于快速获得高分辨率遥感图像具有重要意义。 相似文献
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We propose a new analytical edge spread function (ESF) fitting model to measure the modulation transfer function (MTF).The ESF data obtained from a slanted-edge image are fitted to our model through the non-linear least squares (NLLSQ) method.The differentiation of the ESF yields the line spread function (LSF),the Fourier transform of which gives the profile of two-dimensional MTF.Compared with the previous methods,the MTF estimate determined by our method conforms more closely to the reference.A practical application of our MTF measurement in degraded image restoration also validates the accuracy of our model. 相似文献
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Effect coatings have the unique property of large change of appearance under different viewing conditions. This results in quality control problems of related products. In this letter, samples of metallic panels with effect coatings are visually assessed and measured. Based on experimental results, we propose formulae to predict precisely the total differences of effective samples in terms of variations in color, coarseness, and glint. Under diffused illumination, the total difference formula includes color difference and coarseness difference. Under directional illumination, the total difference formula includes color difference and glint difference. 相似文献
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氢氧化物共沉淀法制备LiMn0.45Ni0.45Co0.1O2正极材料的反应条件 总被引:1,自引:0,他引:1
通过氢氧化物共沉淀法制备了Mn0.45Ni0.45Co0.1(OH)2, 研究了反应条件对产物形貌特征的影响, 重点研究了F-离子对产物形貌特征、振实密度的影响. 利用前述产物通过高温固相合成法制备了高密度的LiMn0.45Ni0.45Co0.1O2和LiMn0.45Ni0.45Co0.1O1.96F0.04正极材料, 并研究了F元素掺杂对循环性能的影响. 结果表明, 在沉淀体系中加入F-, 可以改善产物的形貌特征和振实密度. SEM 测试结果表明, 产物具有良好的形貌; XRD测试表明, 产物具有良好的层状结构, 无杂质相存在. 在充放电电压区间为2.8-4.4 V, 电流密度为30 mA·g-1 时, LiMn0.45Ni0.45Co0.1O2和LiMn0.45Ni0.45Co0.1O1.96F0.04首次放电容量均为157 mAh·g-1, 经过50 次循环, 放电容量保持率分别为72.6%和86.0%, F元素的掺杂可以明显改进材料的循环性能. 相似文献
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