Qolamreza Nadalinia Charei, H. F. Aghamalek, S. Razavi, M. Golestanian
{"title":"An Improved soft decision method in Viterbi decoder using artificial neural networks","authors":"Qolamreza Nadalinia Charei, H. F. Aghamalek, S. Razavi, M. Golestanian","doi":"10.1109/PRIA.2013.6528456","DOIUrl":"https://doi.org/10.1109/PRIA.2013.6528456","url":null,"abstract":"In this paper, the application of artificial neural networks to improve the efficiency of soft decision in Viterbi decoder is proposed. By adding neural network to the decision block of Viterbi decoders and training in supervisor manner, neural networks will be able to anticipate and handle a wide range of distortion. Using the neural networks soft decision in Viterbi decoder block would reduce the bit error rate (BER) in data transmission for AWGN channels. This method can provide low bit BER for data transmission on channels with low signal to noise ratio (SNR). The results show that the proposed technique can improve the efficiency of decision making in comparison with other methods of decision making (soft, hard and slow), in term of BER.","PeriodicalId":370476,"journal":{"name":"2013 First Iranian Conference on Pattern Recognition and Image Analysis (PRIA)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129583831","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":"Intelligent mineral identification using clustering and artificial neural networks techniques","authors":"H. Izadi, J. Sadri, Nosrat-Agha Mehran","doi":"10.1109/PRIA.2013.6528426","DOIUrl":"https://doi.org/10.1109/PRIA.2013.6528426","url":null,"abstract":"Identifying of minerals in petrographic thin sections is done by mineralogist using polarized microscope rotation stage. Mineral identification will be a tedious work if the number of thin sections is large; this may cause some errors in final identification. Therefore, in this study, artificial neural networks (ANNs) are utilized for mineral identification. ANNs inspired by neural activities of humans have been widely being used in myriad fields of science, they are capable of estimating complex non-linear functions. Digital images are captured from every thin section, by plane-polarized and cross-polarized lights that yield twelve features (red, green, blue, hue, saturation and intensity in two states of lights) for identification of minerals. The first six features are related to plane-polarized light and the rest are related to cross-polarize light. Then, extracted features are fed into the ANN as inputs, which has been trained therefore minerals will be recognized. The high accuracy and precision of minerals identification in this study, have given the proposed intelligent system remarkable capabilities.","PeriodicalId":370476,"journal":{"name":"2013 First Iranian Conference on Pattern Recognition and Image Analysis (PRIA)","volume":"290 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124177318","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":"Improving Farsi font recognition accuracy by using proposed directional elliptic Gabor filters","authors":"M. Ziaratban, F. Bagheri","doi":"10.1109/PRIA.2013.6528429","DOIUrl":"https://doi.org/10.1109/PRIA.2013.6528429","url":null,"abstract":"In this paper a directional filter is proposed to describe the curvedness of textures. The proposed filter is inspired by the basic Gabor filter and has an elliptic form. Thus, they are called directional elliptic Gabor (DEG) filters. Characters and subwords in Farsi machine-printed texts are constructed from both straight and curved segments. Moreover, the amounts of curvedness of various Farsi fonts are different. Therefore, the features based on the proposed filter can be useful in Farsi font recognition. Better describing straightness and curvedness of text components increases the separability among various fonts. Experiments demonstrate that using both Gabor filters and the proposed DEG filters for texture features extraction improves the Farsi font recognition accuracy.","PeriodicalId":370476,"journal":{"name":"2013 First Iranian Conference on Pattern Recognition and Image Analysis (PRIA)","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129655362","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 new approach of training Hidden Markov Model by PSO algorithm for gene Sequence Modeling","authors":"M. Soruri, S. Hamid Zahiri, J. Sadri","doi":"10.1109/PRIA.2013.6528441","DOIUrl":"https://doi.org/10.1109/PRIA.2013.6528441","url":null,"abstract":"Sequence Modeling is one of the most important problems in bioinformatics. In the sequential data modeling, Hidden Markov Models(HMMs) have been widely used to find similarity between sequences, since the performance of HMMs are suitable for handling of sequence patterns with various lengths. In this paper, a new approach for biological sequence modeling scheme based on HMMs optimized by Particle Swarm Optimization(PSO) algorithm is introduced. In this approach, each sequence is described by a specific HMM, and then for each model, its probability to generate individual sequence is evaluated. Then, the generated sequence is compared with actual sequence. Experiments carried out on gene sequences dataset show that the proposed approach can be successfully utilized for sequence modeling.","PeriodicalId":370476,"journal":{"name":"2013 First Iranian Conference on Pattern Recognition and Image Analysis (PRIA)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131014792","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":"Evaluate and determine the most effective treatment parameters in esophageal cancer using intelligent systems","authors":"H. Zahedi, N. Mehrshad, M. Graili","doi":"10.1109/PRIA.2013.6528455","DOIUrl":"https://doi.org/10.1109/PRIA.2013.6528455","url":null,"abstract":"In recent years, use of the artificial neural networks has been considered in predicting the effects of different variables on a given variable and modeling these variables have with one another. In this research, first, artificial neural networks have been used to predict the results of treatment of esophageal cancer in patients with esophageal squamous cell carcinoma using chemotherapy, radiotherapy and then Nyvajvnt surgery. In addition, the Particle Swarm Optimization (PSO) is used for training the neural network. Then, using the combined neural network and genetic algorithms, a method is proposed to select the most effective treatment parameters among a set of factors affecting the proposed treatment process. Implementation results show that neural network can predict the level of satisfactory treatment of the cancer process. The results of methods for selecting the most effective parameters on the process of treatment among sixteen proposed parameters are compatible with the previous findings.","PeriodicalId":370476,"journal":{"name":"2013 First Iranian Conference on Pattern Recognition and Image Analysis (PRIA)","volume":"48 3‐4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132836981","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 recognition approach using multilayer perceptron and keyboard dynamics patterns","authors":"A. Rezaei, S. Mirzakuchaki","doi":"10.1109/PRIA.2013.6528445","DOIUrl":"https://doi.org/10.1109/PRIA.2013.6528445","url":null,"abstract":"Multilayer perceptron (MLP) with one hidden layer is one of the most common forms of artificial neural networks ever utilized. A well-trained MLP with proper number of nodes in its hidden layer is demonstrated to have efficient and robust performance on patterns with high orders. In this paper in order to form an identification system, MLP is utilized as a classifier to distinguish keyboard dynamics patterns of several people. A variant number of neurons in the single hidden layer is investigated empirically to reach the optimum number. The optimum number of hidden layer neurons has been found to be 44 and relevant equal error rate (EER) equal to 0.95% has been reported. The false acceptance rate (FAR) and false reject rate (FRR) for this number of neuron has been empirically evaluated equal to 0.49% and 19.51% respectively.","PeriodicalId":370476,"journal":{"name":"2013 First Iranian Conference on Pattern Recognition and Image Analysis (PRIA)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129558014","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":"Rapid off-line signature verification based on Signature Envelope and Adaptive Density Partitioning","authors":"V. Malekian, A. Aghaei, M. Rezaeian, M. Alian","doi":"10.1109/PRIA.2013.6528428","DOIUrl":"https://doi.org/10.1109/PRIA.2013.6528428","url":null,"abstract":"Handwritten signature is a widely used biometric which incorporates high intra personal variance. The most challenging problem in automatic signature verification is to extract features which are robust against this natural variability and at the same time discriminate between genuine and fake samples. This paper presents a novel method for extracting easily computed rotation and scale invariant features for offline signature verification. These features are extracted using the signature envelope and adaptive density partitioning. The effectiveness of the proposed features has been investigated over 900 signatures using a neural network classifier. The experimental results show the verification accuracy rate of 90.7%.","PeriodicalId":370476,"journal":{"name":"2013 First Iranian Conference on Pattern Recognition and Image Analysis (PRIA)","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114345607","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 new approach for froth image segmentation using fuzzy logic","authors":"F. Daneshmand, N. Mehrshad, M. Massinaei","doi":"10.1109/PRIA.2013.6528459","DOIUrl":"https://doi.org/10.1109/PRIA.2013.6528459","url":null,"abstract":"The segmentation of flotation froth images is extremely challenging mainly due to the dynamic and continuous nature of the process as well as large number of closely packed bubbles of different sizes with barely detectable boundaries. All these characteristics of the froth images have complicated the development of a reliable and comprehensive segmentation algorithm. In the present work, an adaptive fuzzy model based on multi-scale and multi-directional simulation of the human visual system is developed to delineate the bubbles in the flotation froth images. The implemented model is successfully validated using some laboratory and industrial scale froth images.","PeriodicalId":370476,"journal":{"name":"2013 First Iranian Conference on Pattern Recognition and Image Analysis (PRIA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124249508","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 new image steganalysis method using block based optimal wavelet packet decomposition","authors":"L. Omrani, K. Faez","doi":"10.1109/PRIA.2013.6528446","DOIUrl":"https://doi.org/10.1109/PRIA.2013.6528446","url":null,"abstract":"Feature extraction is the base of steganalysis which is a part of image processing research field. This article has proposed a steganalysis method for digital images. Common steganalysis techniques go over the entire image; this will reduce their focus on higher frequencies in which there is a higher probability for hidden messages. Accordingly, in this article, images are first decomposed into smaller blocks and then optimal wavelet packet decomposition method is applied to extract the features of each block. In the proposed algorithm, characteristic function moments obtained from wavelet sub-bands are used as features. These features are arranged in a tree structure and then an entropy cost function is used to select the optimal values of these features. In the next step, the blocks are classified in several categories and a classifier appropriate to the features of each category is applied to distinguish cover or stego blocks. Finally, the majority vote rule is applied on the results obtained from the blocks to determine whether the entire image is a cover or stego image. The experimental results of this steganalysis method show its high accuracy as compared to the common steganalysis algorithms in the frequency domain.","PeriodicalId":370476,"journal":{"name":"2013 First Iranian Conference on Pattern Recognition and Image Analysis (PRIA)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129059280","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":"Face recognition with Linear Discriminant Analysis and neural networks","authors":"Sepide Fatahi, Ehsan Zadkhosh, Abdollah Chalechale","doi":"10.1109/PRIA.2013.6528431","DOIUrl":"https://doi.org/10.1109/PRIA.2013.6528431","url":null,"abstract":"In this paper, a new face recognition method based on PCA (principal Component Analysis), LDA (Linear Discriminant Analysis) and neural networks is proposed. Combination of PCA and LDA is used for improving the capability of LDA when a few samples of images are available. The proposed method was tested on ORL face database. Experimental results on this database demonstrated the effectiveness of the proposed method for face recognition with less misclassification in comparison with previous methods.","PeriodicalId":370476,"journal":{"name":"2013 First Iranian Conference on Pattern Recognition and Image Analysis (PRIA)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130495450","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}