机构

• 长春光学精密机械与物... [1]
• 国家天文台 [1]
• 沈阳自动化研究所 [1]
• 西安光学精密机械研究... [1]

采集方式

• OAI收割 [4]

内容类型

• 会议论文 [2]
• 期刊论文 [2]

发表日期

• 2018 [1]
• 2016 [1]
• 2013 [1]
• 2007 [1]

学科主题

• Computer S... [1]

筛选

浏览/检索结果: 共4条，第1-4条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Star Map Stitching Algorithm Based on Visual Principle 期刊论文  OAI收割 INTERNATIONAL JOURNAL OF PATTERN RECOGNITION AND ARTIFICIAL INTELLIGENCE, 2018, 卷号: 32, 期号: 8 作者:  Qiu, Shi;  Zhou, Dongmei;  Guo, Qiang;  Qin, Hanlin;  Yan, Xiang   |  收藏  |  浏览/下载：73/0  |  提交时间：2018/04/26 Image Processing  Visual Principle  Star Map Stitching  Data Compression   Free-Energy Principle Inspired Video Quality Metric and Its Use in Video Coding 期刊论文  OAI收割 IEEE TRANSACTIONS ON MULTIMEDIA, 2016, 卷号: 18, 期号: 4, 页码: 590-602 作者:  Xu, Long;  Lin, Weisi;  Ma, Lin;  Zhang, Yongbing;  Fang, Yuming 收藏  |  浏览/下载：60/0  |  提交时间：2016/11/01 Free-energy principle  perceptual video coding optimization  video coding  visual quality assessment (VQA)   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：41/0  |  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.   Study on the detection sensitivity of APS star tracker (EI CONFERENCE) 会议论文  OAI收割 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, July 8, 2007 - July 12, 2007, Chengdu, China 作者:  Li J.;  Li J.;  Li J.;  Liu J.;  Liu J. 收藏  |  浏览/下载：24/0  |  提交时间：2013/03/25 Detection sensitivity is an important parameter of star tracker  which can express detection limit of the weakest detected visual star magnitude. Detection sensitivity of APS star tracker is related to APS parameters  optical system aperture and lens permeance rate  SNR  and so on. This paper  the expressions of APS star detected signal and APS noise are given  so signal-noise ratio (SNR) of star tracker can be obtained. And based on the theory inspecting signal from noise and optimal SNR threshold detection principle  the detection sensitivity model can be obtained. The corresponding APS star tracker detection limit is obtain based on APS IBIS5 and general optical system parameter design. When SNR threshold is 8.1 which can obtain 99.9% detection probability  we can calculate that the detection sensitivity is 6.5 visual magnitude.