The Design about Aiming at Amount of Change from Baseline Detector with Characteristics of High-Resolution

2012 ◽  
Vol 249-250 ◽  
pp. 218-225
Author(s):  
Jin Song Wang ◽  
Yu Chen Zhao ◽  
Zhi Yong An
Keyword(s):  
Measurement Error ◽  
High Resolution ◽  
Flat Glass ◽  
Angle Measurement ◽  
Compensation Method ◽  
Experimental Results

In order to measure to the aiming at amount of changes from baseline, we designed a detector with characteristics of high-resolution. The apparatus takes with the combination of flat glass-based compensation method and reading such sine mechanism on the zero subdivision institutions, to achieve the angle measurement in way of high-resolution and outside reading. By using 0.2″theodolite as the basic instrument for verification of measurement, experimental results show that resolution of the instrument to achieve 2.16″, the measurement error less than 10.8″.

Application and novel angle measurement error compensation method of circular gratings

2019 ◽  
Vol 27 (8) ◽  
pp. 1719-1726 ◽  
Author(s):  
于连栋 YU Lian-dong ◽  
鲍文慧 BAO Wen-hui ◽  
赵会宁 ZHAO Hui-ning ◽  
贾华坤 JIA Hua-kun ◽  
张 润 ZHANG Run
Keyword(s):  
Measurement Error ◽  
Error Compensation ◽  
Angle Measurement ◽  
Compensation Method

scholarly journals PCDRN: Progressive Cascade Deep Residual Network for Pansharpening

2020 ◽  
Vol 12 (4) ◽  
pp. 676 ◽  
Author(s):  
Yong Yang ◽  
Wei Tu ◽  
Shuying Huang ◽  
Hangyuan Lu
Keyword(s):  
High Resolution ◽  
Loss Function ◽  
High Frequency ◽  
Experimental Results ◽  
Superior Performance ◽  
Residual Network ◽  
High Quality ◽  
Convolution Approach ◽  
Visual Assessments ◽  
Coarse To Fine

Pansharpening is the process of fusing a low-resolution multispectral (LRMS) image with a high-resolution panchromatic (PAN) image. In the process of pansharpening, the LRMS image is often directly upsampled by a scale of 4, which may result in the loss of high-frequency details in the fused high-resolution multispectral (HRMS) image. To solve this problem, we put forward a novel progressive cascade deep residual network (PCDRN) with two residual subnetworks for pansharpening. The network adjusts the size of an MS image to the size of a PAN image twice and gradually fuses the LRMS image with the PAN image in a coarse-to-fine manner. To prevent an overly-smooth phenomenon and achieve high-quality fusion results, a multitask loss function is defined to train our network. Furthermore, to eliminate checkerboard artifacts in the fusion results, we employ a resize-convolution approach instead of transposed convolution for upsampling LRMS images. Experimental results on the Pléiades and WorldView-3 datasets prove that PCDRN exhibits superior performance compared to other popular pansharpening methods in terms of quantitative and visual assessments.

scholarly journals Ship Classification in High-Resolution SAR Images Using Deep Learning of Small Datasets

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2929 ◽  
Author(s):  
Yuanyuan Wang ◽  
Chao Wang ◽  
Hong Zhang
Keyword(s):  
Deep Learning ◽  
High Resolution ◽  
Classification Accuracy ◽  
Experimental Results ◽  
Fine Tuning ◽  
Classification Model ◽  
Great Success ◽  
Sar Images ◽  
Convolutional Networks ◽  
Ship Classification

With the capability to automatically learn discriminative features, deep learning has experienced great success in natural images but has rarely been explored for ship classification in high-resolution SAR images due to the training bottleneck caused by the small datasets. In this paper, convolutional neural networks (CNNs) are applied to ship classification by using SAR images with the small datasets. First, ship chips are constructed from high-resolution SAR images and split into training and validation datasets. Second, a ship classification model is constructed based on very deep convolutional networks (VGG). Then, VGG is pretrained via ImageNet, and fine tuning is utilized to train our model. Six scenes of COSMO-SkyMed images are used to evaluate our proposed model with regard to the classification accuracy. The experimental results reveal that (1) our proposed ship classification model trained by fine tuning achieves more than 95% average classification accuracy, even with 5-cross validation; (2) compared with other models, the ship classification model based on VGG16 achieves at least 2% higher accuracies for classification. These experimental results reveal the effectiveness of our proposed method.

scholarly journals Design for a Highly Stable Laser Source Based on the Error Model of High-Speed High-Resolution Heterodyne Interferometers

Sensors ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 1083
Author(s):  
Hongxing Yang ◽  
Ziqi Yin ◽  
Ruitao Yang ◽  
Pengcheng Hu ◽  
Jing Li ◽  
...  
Keyword(s):  
Measurement Error ◽  
High Resolution ◽  
High Speed ◽  
Beat Frequency ◽  
Error Model ◽  
Laser Source ◽  
Measurement Error Model ◽  
High Resolution Measurement ◽  
Resolution Measurement ◽  
The Impact

Heterodyne interferometers with two opposite Doppler shift interference signals have been proposed for high-resolution measurement with high measurement speed, which can be used in the background of high-speed high-resolution measurement. However, a measurement error model for high-speed high-resolution heterodyne interferometers (HSHR-HIs) has not yet been proposed. We established a HSHR-HI measurement error model, analyzed the influence of beat frequency stability with a simplified optical structure, and then designed an offset-locked dual-frequency laser source with a digital control system to reduce the impact of beat frequency drift. Experiments were used to verify the correction of the measurement error model and the validity of the laser source. The results show that the new laser source has a maximum beat frequency range of 45 MHz, which shows the improvements in the measuring speed and resolution.

A Dynamic Voltage Compensation Method for Improving Weighing Accuracy

2013 ◽  
Vol 333-335 ◽  
pp. 317-321
Author(s):  
Rong Sen Yin ◽  
Jia Qiang Yang
Keyword(s):  
Measurement Error ◽  
Digital Signal Processor ◽  
Digital Signal ◽  
Wheatstone Bridge ◽  
External Source ◽  
Compensation Method ◽  
Voltage Fluctuation ◽  
Voltage Compensation ◽  
Voltage Signal ◽  
Dynamic Voltage

In order to eliminate the measurement error caused by working voltage fluctuation of weighing sensor, a dynamic voltage compensation method for improving the weighing accuracy was proposed in the paper. The method takes strain gauge type pressure sensor as the weighing sensor and corrects Wheatstone bridge circuit. By synchronously detecting output voltage signal and working voltage of the weighing sensor, the method dynamically compensates the working voltage fluctuation of the weighing sensor, corrects the measurement error caused by the voltage fluctuation of external source and calculates the weight in real time. A weighing system based on the digital signal processor (DSP) was designed. Results of simulation experiment verify the feasibility of the proposed method.

A high-resolution Weissenberg camera for X-ray synchrotron radiation

1990 ◽  
Vol 23 (5) ◽  
pp. 351-354
Author(s):  
D. Hohlwein ◽  
J. D. Axe
Keyword(s):  
Phase Transformation ◽  
High Resolution ◽  
Synchrotron Radiation ◽  
Reciprocal Space ◽  
Experimental Results ◽  
Germanium Crystal ◽  
Synchrotron Source ◽  
X Ray ◽  
High Resolution Mapping ◽  
Resolution Mapping

A photographic Weissenberg camera has been constructed which can be mounted on the 2θ arm of a four-circle diffractometer. At a distance of 0.5 m from the sample the 2θ resolution for a 100 μm crystal is 0.2 mrad (0.01°), allowing a high-resolution mapping of reciprocal space at a synchrotron source in an efficient way. As sample experimental results, a study is presented of the streak system around the 111 reflection of a perfect germanium crystal and the detection of a minute phase transformation in a single-powder grain of a high-Tc superconductor.

An improved motion compensation method for high resolution UAV SAR imaging

2014 ◽  
Vol 57 (12) ◽  
pp. 1-13 ◽  
Author(s):  
BangKui Fan ◽  
ZeGang Ding ◽  
WenBin Gao ◽  
Teng Long
Keyword(s):  
High Resolution ◽  
Motion Compensation ◽  
Compensation Method ◽  
Sar Imaging

Research on Tool Wear and Compensation Method of Ultrasonic Milling

2012 ◽  
Vol 217-219 ◽  
pp. 2088-2092
Author(s):  
Dong Ju Feng ◽  
Zhan Guo Xu
Keyword(s):  
Tool Wear ◽  
Process Parameters ◽  
Path Length ◽  
Compensation Method ◽  
Experimental Results ◽  
Ultrasonic Milling

The phenomenon of tool wear and its generating reason and mechanism in ultrasonic milling are analyzed. Then, the effect of various process parameters on tool wear is researched. It is educed through analysis that compensation method of tool wear according to the path length of tool is more suitable for ultrasonic milling. The experimental results show that the mode of ultrasonic milling is completely feasible, and the compensation of tool longitudinal wear can be realized.

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