Photoelectronic Technology Committee Conferences最新文献_第4页

Fabrication and surface profile simulation of sapphire microlens array 蓝宝石微透镜阵列的制备及表面轮廓模拟

Photoelectronic Technology Committee Conferences Pub Date : 2015-04-13 DOI: 10.1117/12.2180221

Xiangyang Liu, Shijia Liu, H. Qiao, Longyuan Zhu, Xiang-yang Li

引用次数: 0

A background suppression algorithm for infrared image based on shearlet 基于shearlet的红外图像背景抑制算法

Photoelectronic Technology Committee Conferences Pub Date : 2015-04-13 DOI: 10.1117/12.2180080

Ruibin Zou, Caicheng Shi, XiaoWei Qin

{"title":"A background suppression algorithm for infrared image based on shearlet","authors":"Ruibin Zou, Caicheng Shi, XiaoWei Qin","doi":"10.1117/12.2180080","DOIUrl":"https://doi.org/10.1117/12.2180080","url":null,"abstract":"Because of the relative far distance between infrared imaging system and target or the wide field infrared optical, the imaging area of infrared target is only a few pixels, which is isolated or spots to be showed in the field of view. The only available is the intensity information (gray value) for the target detection. Simultaneously, there are many shortcomings of the infrared image, such as large noise, interference and so on, therefore the small target is always buried in the background and noises. The small target is relatively difficult to detect, so generally, it is impossible to make reliable detection to this target in a single frame image. Summarily, the core of the infrared small target detection algorithm is the background and noise suppression based on a single frame image. Aiming at the infrared small target detection and the above problems, a shearlets-based background suppression algorithm for infrared image is proposed. The algorithm demonstrates the performance of advantage based on shearlets, which is especially designed to address anisotropic and directional information at various scales. This transform provides an optimally efficient representation of images, which is greatly reduced the amount of the information and the available information representation. In the paper, introducing the principle of shearlets first, and then proposing the theory of the algorithm and explaining the implementation step. Finally, giving the simulation results. In Matlab simulations with this method for several sets of infrared images, simulation results conformed to the theory on background suppression based on shearlets. The result showed that this method can effectively suppress background, and improve the SCR and achieve a satisfactory effect in the sky background. The method is very effectively for target detection, identification, track in infrared image system for the future.","PeriodicalId":225534,"journal":{"name":"Photoelectronic Technology Committee Conferences","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131038494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A detection method of infrared dim small target under complex cloud background 复杂云背景下红外弱小目标的检测方法

Photoelectronic Technology Committee Conferences Pub Date : 2015-04-13 DOI: 10.1117/12.2179509

Ruo-wang Chen, Chunsheng Hu, Wei-feng Liu, Jian-kang Shi

引用次数: 0

Geometric correction method of rotary scanning hyperspectral image in agriculture application 旋转扫描高光谱图像几何校正方法在农业中的应用

Photoelectronic Technology Committee Conferences Pub Date : 2015-04-13 DOI: 10.1117/12.2178351

P. Wan, Guijun Yang, Bo Xu, Haikuan Feng, Haiyang Yu

引用次数: 1

The application of IR detector with windowing technique in the small and dim target detection 加窗红外探测器在弱小目标检测中的应用

Photoelectronic Technology Committee Conferences Pub Date : 2015-04-13 DOI: 10.1117/12.2180906

Xiaofeng Su, Fansheng Chen, Yucui Dong, Kun Cui, Sijie Huang

{"title":"The application of IR detector with windowing technique in the small and dim target detection","authors":"Xiaofeng Su, Fansheng Chen, Yucui Dong, Kun Cui, Sijie Huang","doi":"10.1117/12.2180906","DOIUrl":"https://doi.org/10.1117/12.2180906","url":null,"abstract":"The performance of small and dim IR target detection is mostly affected by the signal to noise ratio(SNR) and signal to clutter ratio(SCR), for the MWIR especially LWIR array detector, because of the background radiation and the optical system radiation, the SCR cannot be unlimited increased by using a longer integral time, so the frame rate of the detector was mainly limited by the data readout time especially in a large-scale infrared detector, in this paper a new MWIR array detector with windowing technique was used to do the experiment, which can get a faster frame rate around the target by using the windowing mode, so the redundant information could be ignore, and the background subtraction was used to remove the fixed pattern noise and adjust the dynamic range of the target, then a local NUC(non uniformity correction) technique was proposed to improve the SCR of the target, the advantage between local NUC and global NUC was analyzed in detail, finally the multi local window frame accumulation was adopted to enhance the target further, and the SNR of the target was improved. The experiment showed the SCR of the target can improved from 1.3 to 36 at 30 frames accumulation, which make the target detection and tracking become very easily by using the new method.","PeriodicalId":225534,"journal":{"name":"Photoelectronic Technology Committee Conferences","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132889182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation for spectral response of solar-blind AlGaN based p-i-n photodiodes 太阳盲AlGaN基p-i-n光电二极管光谱响应模拟

Photoelectronic Technology Committee Conferences Pub Date : 2015-04-13 DOI: 10.1117/12.2180105

Shi Xue, Jin-tong Xu, Xiang-yang Li

引用次数: 2

A high performance constant fraction discriminator for pulsed laser proximity fuze 一种用于脉冲激光近炸引信的高性能恒分数鉴别器

Photoelectronic Technology Committee Conferences Pub Date : 2015-04-13 DOI: 10.1117/12.2179946

Pingping Yao, Bi-hai Tu, Xiang Wang, Yi Zhang, Ping-jian Zhao

{"title":"A high performance constant fraction discriminator for pulsed laser proximity fuze","authors":"Pingping Yao, Bi-hai Tu, Xiang Wang, Yi Zhang, Ping-jian Zhao","doi":"10.1117/12.2179946","DOIUrl":"https://doi.org/10.1117/12.2179946","url":null,"abstract":"A novel high performance timing discrimination circuit architecture for a pulsed laser proximity fuze based on constant fraction discrimination technique is constructed and tested. A LC resonant circuit is designed to replace the traditional transmission delay-line to accommodate the special requirements of laser proximity fuze for low size, power consumption, weight and cost. The walk error of the improved constant fraction discriminator is analyzed with lots of detailed experiments. The experiment results indicate that the discriminator eliminates the dependency of the echo pulse amplitude from the timing result, the walk error caused by the amplitude variation and the noise variation of the received echo pulse is less than 125ps, when the SNR is more than 20 and the echo pulse is 0.2V to 2.134V (20.12dB dynamic range). The error is less than 100ps when the SNR more than 60. Furthermore, Detection on the whole system integrating the timing discrimination circuit verifies that, the laser repetition frequency can reach 10 KHz, the accuracy of the system with a measurement time of 0.1ms is 1.45cm in the case of a noncooperative target at a measurement range from 2m to 24m at room temperature, which improve greatly the fixed distance precision of pulsed laser proximity fuze.","PeriodicalId":225534,"journal":{"name":"Photoelectronic Technology Committee Conferences","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134361172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

An infrared image non-uniformity correction algorithm based on pixels’ equivalent integral capacitance 基于像素等效积分电容的红外图像非均匀性校正算法

Photoelectronic Technology Committee Conferences Pub Date : 2015-04-13 DOI: 10.1117/12.2182553

Shuanglei Zhang, Tao Wang, Chun-Mei Xu, Fansheng Chen

引用次数: 0

Research progress and perspective of hyperspectral image projectors 高光谱投影仪的研究进展与展望

Photoelectronic Technology Committee Conferences Pub Date : 2015-04-13 DOI: 10.1117/12.2179863

Lizhi Kang, Xiuing Tang, Yi-huai Xiang, Y. Huang

引用次数: 0

New bionic navigation algorithm based on the visual navigation mechanism of bees 基于蜜蜂视觉导航机制的仿生导航新算法

Photoelectronic Technology Committee Conferences Pub Date : 2015-04-13 DOI: 10.1117/12.2179840

Yufeng Huang, Yi Liu, Jianguo Liu

引用次数: 0