中国科学院机构知识库网格系统: 检索

Competition and Cooperation between Shared Bicycles and Public Transit: A Case Study of Beijing 期刊论文 OAI收割
SUSTAINABILITY, 2019, 卷号: 11, 期号: 5, 页码: 13
作者: Jin, Haitao; Jin, Fengjun; Wang, Jiao'e; Sun, Wei; Dong, Libo

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收藏 | 浏览/下载：58/0 | 提交时间：2019/05/22

shared bicycle public transit trip distance histogram shifting method urban sustainability

Competition and Cooperation between Shared Bicycles and Public Transit: A Case Study of Beijing 期刊论文 OAI收割
SUSTAINABILITY, 2019, 卷号: 11, 期号: 5, 页码: 13
作者: Jin, Haitao; Jin, Fengjun; Wang, Jiao'e; Sun, Wei; Dong, Libo

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收藏 | 浏览/下载：18/0 | 提交时间：2019/05/22

shared bicycle public transit trip distance histogram shifting method urban sustainability

Competition and Cooperation between Shared Bicycles and Public Transit: A Case Study of Beijing 期刊论文 OAI收割
SUSTAINABILITY, 2019, 卷号: 11, 期号: 5, 页码: 13
作者: Jin, Haitao; Jin, Fengjun; Wang, Jiao'e; Sun, Wei; Dong, Libo

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收藏 | 浏览/下载：25/0 | 提交时间：2019/05/22

shared bicycle public transit trip distance histogram shifting method urban sustainability

Randomized Hough transform filter for echo extraction in DLR 期刊论文 OAI收割
ADVANCES IN SPACE RESEARCH, 2016, 卷号: 58, 期号: 9, 页码: 1827-1839
作者: Liu, Tong; Chen, Hao; Shen, Ming; Gao, Pengqi; Zhao, You

收藏 | 浏览/下载：20/0 | 提交时间：2017/03/02

Debris laser ranging Valid returns extraction Histogram method Randomized Hough transform

基于改进暗目标法山区HJ CCD影像气溶胶光学厚度反演 期刊论文 OAI收割
光谱学与光谱分析, 2015, 卷号: 35, 期号: 6, 页码: 1479-1487
作者: Zhao Zhi-qiang; Li Ai-nong; Bian Jin-hu; Huang Cheng-quan

收藏 | 浏览/下载：92/0 | 提交时间：2015/07/20

HJ CCD imagery Rred band histogram threshold method Improved DDV algorithm AOT retrieve Mountainous

An improved ddv method to retrieve aot for hj ccd image in typical mountainous areas 期刊论文 iSwitch采集
Spectroscopy and spectral analysis, 2015, 卷号: 35, 期号: 6, 页码: 1479-1487
作者: Zhao Zhi-qiang; Li Ai-nong; Bian Jin-hu; Huang Cheng-quan

收藏 | 浏览/下载：26/0 | 提交时间：2019/05/10

Hj ccd imagery Rred band histogram threshold method Improved ddv algorithm Aot retrieve Mountainous

A Local Image Enhancement Method Based on Adjacent Pixel Gray Order-preserving Principle 会议论文 OAI收割
5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Infrared Imaging and Applications, Beijing, June 25-27, 2013
作者: Fan XP(范晓鹏); Cai TF(蔡铁峰); Zhu F(朱枫)

收藏 | 浏览/下载：35/0 | 提交时间：2013/12/26

The paper is committed in local image enhancement. At first, the authors propose an adjacent pixel gray order-preserving principle. Adjacent pixel gray order-preserving principle is the basement of local enhancement method which ensures that there is no distortion in processed image. And then, the authors propose an iterative algorithm, which could stretch gray-scale difference of adjacent pixels in premise of not changing gray magnitude relationship between adjacent pixels. At last, the authors propose a totally reference image quality assessment method based on adjacent pixel gray order-preserving principle. According to this quality assessment method, the authors made a set of comparative experiments with local histogram equalization and method. Experimental results show that the proposed enhancement method can get higher score and provide better visual effects, fully demonstrating its effectiveness. According to this quality assessment method, the proposed method shows a good effectiveness, through experimental results and comparison with local histogram equalization method.

An adaptive edge detection method based on Canny operator (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Civil Engineering and Building Materials, CEBM 2011, July 29, 2011 - July 31, 2011, Kunming, China
作者: Chen Y.

收藏 | 浏览/下载：40/0 | 提交时间：2013/03/25

This paper proposes an adaptive Canny operator edge detection algorithm. The proposed method can automatically set the threshold value according to the different image gray-scale gradient histogram adaptively and improve the performance in the detail edge detection and good localization. Experiments show that this method produces better edge detection results performance than the Otsu method. Besides our method Roberts operator Prewitt operator Sobel operator Log operator and Canny operator based on Otsu algorithm are also tested for comparisons. (2011) Trans Tech Publications Switzerland.

Earth elevation map production and high resolution sensing camera imaging analysis (EI CONFERENCE) 会议论文 OAI收割
Optoelectronic Imaging and Multimedia Technology, October 18, 2010 - October 20, 2010, Beijing, China
作者: Dai L.

收藏 | 浏览/下载：132/0 | 提交时间：2013/03/25

The Earth's digital elevation which impacts space camera imaging has prepared and imaging has analysed. Based on matching error that TDI CCD integral series request of the speed of image motion statistical experimental methods-Monte Carlo method is used to calculate the distribution histogram of Earth's elevation in image motion compensated model which includes satellite attitude changes orbital angular rate changes latitude longitude and the orbital inclination changes. And then elevation information of the earth's surface from SRTM is read. Earth elevation map which produced for aerospace electronic cameras is compressed and spliced. It can get elevation data from flash according to the shooting point of latitude and longitude. If elevation data between two data the ways of searching data uses linear interpolation. Linear interpolation can better meet the rugged mountains and hills changing requests. At last the deviant framework and camera controller are used to test the character of deviant angle errors TDI CCD camera simulation system with the material point corresponding to imaging point model is used to analyze the imaging's MTF and mutual correlation similarity measure simulation system use adding cumulation which TDI CCD imaging exceeded the corresponding pixel horizontal and vertical offset to simulate camera imaging when stability of satellite attitude changes. This process is practicality. It can effectively control the camera memory space and meet a very good precision TDI CCD camera in the request matches the speed of image motion and imaging. 2010 SPIE.

Driving and image enhancement for CCD sensing image system (EI CONFERENCE) 会议论文 OAI收割
2010 3rd IEEE International Conference on Computer Science and Information Technology, ICCSIT 2010, July 9, 2010 - July 11, 2010, Chengdu, China
Zhang M.; Ren J.

收藏 | 浏览/下载：27/0 | 提交时间：2013/03/25

The paper designs a driving circuit of high sensitive wide dynamic for CCD sensing imaging system which adopts a Dalsa-made high resolution full-frame 33-mega pixels area CCD FTF5066M. Field Programmable Gate Array (FPGA) is used as the main device to accomplish the timing design of the circuits and power driver control of the sensor. By using the Correlated Double Sampling (CDS) technique the video noise is reduced and the SNR of the system is increased. The output rate of the imaging system designed with integrated chip can reach to 1.3 frames per second through bi-channel output. We use the histogram specification to adjust the brightness of the captured image. And then use the median filtering to suppress the noise. The traditional gray mean gradient (GMG) and the objective evaluation method based on Human Visual System (HVS) used to verify the effect of image enhancement. 2010 IEEE.