Photonics-based radar with a photonic de-chirp receiver has the advantages of broadband operation and real-time signal processing, but it suffers from interference from image frequencies and other undesired frequency-mixing components, due to single-channel real-valued photonic frequency mixing. In this paper, we propose a photonics-based radar with a photonic frequency-doubling transmitter and a balanced in-phase and quadrature (I/Q) de-chirp receiver. This radar transmits broadband linearly fr
2021-02-22 10:04:42 1.45MB
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为了从高分辨率遥感影像中高精度的提取各种工业固体废物,提出了基于支持向量机(SVM)的工业固体废物特征快速提取算法,首先对遥感影像进行各向异性扩散滤波,然后针对高分辨率遥感影像信息量丰富和工业固体废物堆复杂度高的特点,提出基于1-v-1的SVM的多种工业固体废物的多分类策略,在提高精度的同时,兼顾了工业固体废物特征识别的效率。研究结果表明:SVM对工业固体废物判别能力比常规方法有更强的优势,从遥感影像中不仅能准确地辨别出工业固体废物堆的线形特征,还能识别出其材质和类型;该算法能同时识别出多种工业固体废物,执行效率更高。
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The sensitivity of diffuse optical tomography (DOT) imaging exponentially decreases with the increase of photon penetration depth, which leads to a poor depth resolution for DOT. In this letter, an exponential adjustment method (EAM) based on maximum singular value of layered sensitivity is proposed
2021-02-10 16:05:44 328KB 层析成像 图像重建 生物医学 170.6960
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It is well known that a light spot of sub-wavelength will diverge in all directions. In this letter, A method is presented for generating sub-wavelength (0.44\lambda) longitudinally polarized beam, which propagates without divergence over lengths of about 2\lambda in free space. This is achieved by a high numerical aperture (NA) lens axicon that utilizes spherical aberration to duplicate the performance of an axicon and to create an extended focal line.
2021-02-10 16:05:22 474KB 超快现象 双折射 320.7120 260.1440
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A study for texture feature extraction of high-resolution satellite images based on a direction measure and gray level co-occurrence matrix fusion algorithm
2021-02-07 16:03:03 1.25MB 研究论文
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kscript:Kotlin的脚本增强
2021-01-30 20:09:02 546KB kotlin bash scripting dependency-resolution
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Image Super-Resolution Via Sparse Representation的中文版本
2019-12-21 21:34:41 5.31MB Sparse prior image
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ISO国际标准,英文版,Resolution and SFR 影像分辨率空间频率响应的测量标准,介绍了视觉分辨率、e-SFR、s-SFR的测量方法。
2019-12-21 21:03:28 10.81MB ISO12233 MTF SFR
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本书是Donald经典之作High Resolution Radar的中文版,影印可能不太清晰,但是可以看。
2019-12-21 20:03:07 10.96MB 高分辨率 雷达
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发表在CVPR2008年,使用梯度场先验超分辨率的代码,欢迎各位下载!
2019-12-21 19:29:08 104KB gradient
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