2009 2nd International Congress on Image and Signal Processing最新文献

{"title":"Weighted Source Localization in a Underwater Wireless Sensor Array Network","authors":"Yan Ma, L. Fan, Y. Hu","doi":"10.1109/CISP.2009.5301024","DOIUrl":"https://doi.org/10.1109/CISP.2009.5301024","url":null,"abstract":"In novel underwater wireless sensor array network architecture (UWSAN), each sensor node is attached to a local sensor array which performs maximum likelihood direction of arrival (DOA) locally. Sensor nodes communicate via acoustic channel and exchange DOA estimate and received target signal energy. Global DOA based localization is combined with energy in a non-linear least square cost function to realize multi-modal target localization. Very promising simulation results demonstrated preliminarily the feasibility of such a new approach for underwater wireless sensor network. Keywords-source localization; weighted; underwater wireless sensor network.","PeriodicalId":263281,"journal":{"name":"2009 2nd International Congress on Image and Signal Processing","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122247999","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}

{"title":"Drought Monitoring Using the Modified Temperature/Vegetation Dryness Index","authors":"Binyong Li, Haiping Tang, Donghua Chen","doi":"10.1109/CISP.2009.5304333","DOIUrl":"https://doi.org/10.1109/CISP.2009.5304333","url":null,"abstract":"Based on the EVI/Ts feature space which was constructed by land surface temperature (Ts) and Enhanced Vegetation Index (EVI) extracted by MODIS data, the modified temperature/vegetation drought index (MTVDI) was calculated to monitor the drought status of Inner Mongolia Autonomous Region from 9 May to 11 July. The meteorological data and soil moisture data were collected to compare with MTVDI. The correlation analysis was carried out between MTVDI and the cumulative precipitation of the same period(cpsp), the early 16 days(cpe16), the early 30 days(cpe30) and the early 60 days(cpe60). The correlationship between MTVDI and the mean temperature was analyzed in the same way. It implied that the correlation between MTVDI and the cumulative precipitation of the same period became lower and lower, which demonstrated that rainfall has a lagging effect. It depended on the cumulative precipitation in the present period whether the correlation between MTVDI and the cumulative precipitation of the same period or of the previous was significant or no. There was no significant difference in the correlations between MTVDI and the mean temperature of the same period or the previous for two periods, which were from 9 May to 24 May and from 26 June to 11 July with light drought. In heavy drought periods from 25 May to 9 June and from 10 June to 25 June, the correlation coefficient between MTVDI and the mean temperature of the same period was much higher than the previous time, which proved that the drought status was aggravated by high temperature. Finally, the soil moisture data (0-10cm) measured by agro-meteorological stations was carried out linear correlation analysis with MTVDI. The result showed that MTVDI had a close relationship with surface soil moisture and it can be used as an indicator to monitor the drought status. KeywordsMODIS; EVI; Land surface temperature; TVDI","PeriodicalId":263281,"journal":{"name":"2009 2nd International Congress on Image and Signal Processing","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127930507","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}

{"title":"Gear Fault Detection Using Angle Domain Average and Hilbert-Huang Transform Phase Map","authors":"Hui Li, Lihui Fu, Zhentao Li","doi":"10.1109/CISP.2009.5301453","DOIUrl":"https://doi.org/10.1109/CISP.2009.5301453","url":null,"abstract":"Varying speed machinery fault diagnosis is more difficult due to non-stationary machine dynamics and vibration. A new approach to fault diagnosis of bearing under running up based on angle domain average and Hilbert-Huang transform (HHT) phase map is presented. The non-stationary vibration signals are transformed from the time domain transient signal to angle domain stationary one using order tracking. Empirical mode decomposition (EMD) can adaptively decompose the vibration signal into a series of zero mean Intrinsic Mode Functions (IMFs). Hilbert transform can track the instantaneous amplitude and instantaneous frequency of the intrinsic mode functions at any instant. The experimental results show that average domain average and Hilbert-Huang transform phase map can effectively diagnosis the faults of the gear crack. Vibration signal analysis has been widely used in the fault diagnosis of rotating machinery. At present, for the fault diagnosis of the rotating machinery, many researches have been focused on the stationary process. However, little research has been carried out for the run-up and run-down process. Non- stationary vibration signals are difficult to investigate with classical Fourier Transform analysis. Nevertheless, non- stationary vibrations signals from varying speed machinery, especially during run-up and run-down process of gears drive, may include more abundant information about its condition. The operation condition of rotating machinery varies with time during run-up and run-down. During run-up, the speed of rotating is increased until the machine reaches its steady operation speed. While in the transient region, all excitation force changes both in amplitude and frequency. Therefore, some phenomena, which are usually not obvious at constant speed operation, may become more apparent under varying speed conditions. Therefore in the last decade vibration analysis and condition monitoring techniques for varying speed machinery have attracted a lot of attention of scientists and engineers. Some progress has been made in the theoretical analysis, the signal processing methodology, measurements and practical applications of varying speed machinery monitoring (1-4). In this work, the angle domain average technique and Hilbert-Huang transform (HHT) phase map are introduced and applied specifically to gearbox fault diagnosis during run-up. This method is based on the resample technique and Hilbert- Huang transform of the resampling signal which is a function of the angle of the input shaft of the gearbox. This resampling signal can be obtained by resampling of the vibration signal which has been previous sampled in the time domain. The angle average technique provides such a capability for the monitoring of gears by presenting the vibration information as a function of the angle of rotation of the gear, enabling a comparison of the vibration produced by those teeth which are presumed healthy and those that are damaged. Then the ampli","PeriodicalId":263281,"journal":{"name":"2009 2nd International Congress on Image and Signal Processing","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115830979","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}

{"title":"Research of Super-Resolution Reconstruction Based on Multi-Images of Random Micro-Offset","authors":"Jin Zhang, Zhong Wang, Guangye Zhou, S. Ye","doi":"10.1109/CISP.2009.5300809","DOIUrl":"https://doi.org/10.1109/CISP.2009.5300809","url":null,"abstract":"For the micro-displacement of high precision which wanted in reconstruction technology based on image sequences is difficult to achieve. This paper presents a new super-resolution reconstruction technology based on multi-images of random micro-offset. First of all, a sequence image acquisition device based on template is build. We can use the good optical characteristics of template to make accurate calculation of the micro-displacement without suffering the cost of obtaining a certain micro-displacement. Secondly, we present the mathematical model for random micro-displacement based sequence images reconstruction. It can be used to achieve any multiples of high resolution images using any multiple low resolution images. Experiment shows, the algorithms discussed above can effectively increase the true resolution of images.","PeriodicalId":263281,"journal":{"name":"2009 2nd International Congress on Image and Signal Processing","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132022478","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}

{"title":"Blind Separation of Noisy Mixed Images Based on Wiener Filtering and Independent Component Analysis","authors":"Hong-yan Li, Qing-hua Zhao, Jing Zhao, Bao-jin Xiao","doi":"10.1109/CISP.2009.5301437","DOIUrl":"https://doi.org/10.1109/CISP.2009.5301437","url":null,"abstract":"Blind source separation problem has recently received a great deal of attention in signal processing and unsupervised neural learning. In the current approaches, the additive noise is negligible so that it can be omitted from the consideration. To be applicable in realistic scenarios, blind source separation approaches should deal evenly with the presence of noise. In this contribution, we propose approaches to blind signal separation by wiener filtering and independent component analysis (ICA) when the measured signals are contaminated by additive noise. We first use wiener filtering to de-noise and then use the FASTICA algorithm to separate the de-noised images. The result shows that this method may reduce the affect of noise and improve the signal-noise ratio (SNR) of separation images, accordingly renew the original images. Keywords-Independent component analysis, Blind sources separation, wiener filteringt","PeriodicalId":263281,"journal":{"name":"2009 2nd International Congress on Image and Signal Processing","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132233857","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}

{"title":"Complexity Allocation and Control Algorithm for H.264 Inter Coding Based on Mobile Devices","authors":"Xuejuan Gao, L. Zhuo, Lansun Shen","doi":"10.1109/CISP.2009.5300883","DOIUrl":"https://doi.org/10.1109/CISP.2009.5300883","url":null,"abstract":"In order to control the high complexity of H.264 encoder, a novel complexity allocation and control (CAC) algorithm for H.264 inter coding is proposed in this paper, based on the reorder of candidate inter modes with priorities and the new complexity-rate-distortion(C-R-D) cost functions. This algorithm can be performed both at the frame level and the macroblock (MB) level, so as to achieve a more efficient complexity control. Experimental results show that our proposed algorithm can adaptively control the complexity of inter coding at any appropriate levels according to the current energy condition of a mobile device while maximizing the video quality, so as to prolong the operational lifetime of batteries.","PeriodicalId":263281,"journal":{"name":"2009 2nd International Congress on Image and Signal Processing","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132513704","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}

{"title":"A Photochromic Diarylethene with a Six-Membered Aryl Unit for Polarization Optical Recording","authors":"Hui Li, S. Pu, C. Fan, Gang Liu","doi":"10.1109/CISP.2009.5303740","DOIUrl":"https://doi.org/10.1109/CISP.2009.5303740","url":null,"abstract":"A photochromic diarylethene bearing a six-membered aryl unit 1-((2-methyl-5-(3-chlorophenyl) -3-thienyl))-2-((2- methoxylphenyl))perfluorocyclopen- tene (1a) was synthesized and its photochromic and fluorescent properties were also investigated in detail. The results showed that this compound exhibited reversible photochromism, changing from colorless to blue after irradiation with UV light both in solution and in PMMA amorphous film. In hexane, compound 1a exhibited an absorption peak at 292 nm ,upon irradiation with 297 nm light, a new visible absorption band centered at 585 nm emerged while the original peak at 292 nm decreased. In PMMA amorphous film, diarylethene 1a also showed good photochromism as similar to that in solution .Upon irradiation with 313 nm light, the absorption maxima was observed at 583 nm. The fluorescence intensity decreased along with the photochromism upon irradiation with 297 nm light in PMMA amorphous film. In addition, polarization optical recording using diarylethene 1b as recording medium was carried out successfully.","PeriodicalId":263281,"journal":{"name":"2009 2nd International Congress on Image and Signal Processing","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130021674","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}

{"title":"Implementation of Pornographic Videos Detection System","authors":"Zhiyi Qu, Liping Ren, A. Guo, Jing Yu","doi":"10.1109/CISP.2009.5301633","DOIUrl":"https://doi.org/10.1109/CISP.2009.5301633","url":null,"abstract":"Based on the features of video content, this paper addresses the system of detecting pornographic videos. The system makes use of an improved algorithm for shot segmentation based on clustering and then extracts key frames. It converts the detection of video to identification of key frames. We use the skin color detection to detect the key frames which have been extracted. The experimental results show that the method's correct detection is up to 80% and it is an effective method for detecting pornographic videos.","PeriodicalId":263281,"journal":{"name":"2009 2nd International Congress on Image and Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134032594","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}

{"title":"Low Bit Rate Compression of Facial Images Based on Adaptive Over-Complete Sparse Representation","authors":"Xinghao Ding, Kun Qian, Quan Xiao, Yinghao Liao, Donghui Guo, Shoujue Wang","doi":"10.1109/CISP.2009.5301577","DOIUrl":"https://doi.org/10.1109/CISP.2009.5301577","url":null,"abstract":"Among transform-based image compression methods, the sparsity of transform coefficients is very important for compression performance. To overcome the insufficiency of commonly used DCT and Wavelet transform, we apply the theory of adaptive over-complete sparse representation to the filed of facial image compression. By using a novel dictionary design algorithm called K-LMS, which recently proposed by our group, we obtain the adaptive over-complete dictionary firstly. The facial image then can be achieved sparse decomposition by using the OMP algorithm over the obtained adaptive dictionary. Finally, we encode the sparse coefficients by use of the Huffman coding. The experimental results demonstrate that the proposed method is much better than JPEG and JPEG2000 in both objective performance and visual quality, especially in the low bit-rate case.","PeriodicalId":263281,"journal":{"name":"2009 2nd International Congress on Image and Signal Processing","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134083444","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}

{"title":"Monitoring Land Subsidence in Suzhou City Using D-InSAR Technique","authors":"Zhiyong Wang, Jixian Zhang, Guoman Huang, Yonghong Zhang","doi":"10.1109/CISP.2009.5300898","DOIUrl":"https://doi.org/10.1109/CISP.2009.5300898","url":null,"abstract":"This paper mainly discusses how to monitor the land subsidence in Suzhou city using differential Interferometric Synthetic Aperture SAR (D-InSAR) technique. It firstly introduces the principle and data processing flowchart of D- InSAR. Then it carries out test and gets the land subsidence in Suzhou city using two pass D-InSAR technique. At last, it analyzes some problems which influence the application of D- InSAR in monitoring the urban land subsidence in detail. Keywords-D-InSAR;land subsidenc;2-pass;ERS","PeriodicalId":263281,"journal":{"name":"2009 2nd International Congress on Image and Signal Processing","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134151394","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}