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This paper proposes a method for detecting two or more straight lines from an edge image in a similar way of Hough transform. The method consists of labeling of each edge point to presumed straight lines and RANSAC algorithm to evaluate each label. The Genetic Algorithm (GA), an efficient combinatorial optimization algorithm, is used for the labeling process, and the RANSAC is effective for high accuracy...
As we know that the recording density is increasing at an impressive annual rate of 100%, and the access time is decreasing; very soon, the storage density of Harddisk drive will cross 1 Terra bit per square inch. The VCM actuator used in the conventional disk drives has hundreds of flexible resonances at high frequencies, which limit the increase of bandwidth and hence the positioning accuracy. In...
Function optimization is always being one of the important problems of scientific field. Over the past a few decades, many artificial intelligent optimizing algorithms have been invented, such as genetic algorithm (GA), ant colony optimization (ACO), particle swarm optimization (PSO), and so on. Artificial fish school algorithm (AFSA) is a novel optimizing method. In this paper, AFSA was applied to...
Recently, much interest is being taken to protect the copyright of digital data and prevent illegal duplication of it. Towards this purpose, this paper proposes an imperceptible blind watermarking framework suitable for proving ownership claims for large 3D meshes. The basic idea is to decompose the original mesh into a series of details at different scales by using irregular lifting-based wavelet...
A robust design method applied to microgyroscope is presented which is of automation, efficiency and accuracy. The design target is to maximize the microgyroscope performance, within minimum variation of performance due to uncertainties caused by fabricating errors. Analysis of the tolerance is used to calculate the nominal value and the transmitted variation of the objective function, and the genetic...
Audio Steganography is a method that ensures secured data transfer between parties normally in internet community. In this paper, we present a novel, principled approach to resolve the remained problems of substitution technique of Audio Steganography. We use most powerful encryption algorithm (RSA) to encrypt message in the first level of security, which is very complex to break. In the second level,...
The problem of image registration is to find the best set of parameters of an affine transformation, which applied to a given image yields the closest match to a target image (possibly with noise). We present a method to perform parametric image registration based on Differential Evolution. Besides using Differential Evolution, we propose to use an error function robust enough to discard misleading...
This paper proposes an efficient digital audio watermarking scheme using artificial intelligent technique. The watermarks are embedded into the low frequency coefficients in discrete multiwavelet transform domain. The embedding technique is based on quantization process which does not require the original audio signal in the watermark extraction. We have developed an optimization technique using the...
This paper presents an improved dynamic genetic algorithm (IDGA) for reactive power optimization and voltage control. The problem is formulated as a mixed integer, nonlinear optimization problems considering both continuous and discrete control variables. The objective of optimization is minimizing active power losses while maintaining the quality of voltages. During evolution process, the crucial...
Electric power steering system model was set up in this thesis. The mixed H2/H∞ state feedback controllers with robustness and better system performance are designed through making H∞ controllers have H2 optimization by GA. In this method, the coding is float, the selection operator is rank-based fitness assignment and elitist model, the crossover operator is real valued recombination, and the mutation...
This paper introduces a new method of adaptive blind digital image watermarking in spatial domain. Watermarking is a way to hide secret information in a cover image or host medium. Amount of information to hide in the cover image is limited because there is a trade-off between imperceptibility and payload of the data to hide. So increasing the payload in the cover image while watermark remain imperceptible...
This paper incorporate the multilevel selection (MLS) theory into the genetic algorithm. Based on this theory, a Multilevel Cooperative Genetic Algorithm (MLGA) is presented. In MLGA, a species is subdivided in a set of populations, each population is subdivided in groups, and evolution occurs at two levels so called individual and group level. A fast population dynamics occurs at individual level...
This paper describes a genetic algorithm (GA) applied to combinational optimization problems in which the objective functions include uncertain constant parameters. In the present method, noises whose probabilistic distribution is assumed based on the problem environments are added to the parameters during the evaluations process. It is assumed that this allows us to make approximate evaluation of...
This paper proposes an effective framework to boost the efficiency of covariance matching. In this framework, covariance matrices are used to match object in complex environment by fusing multiple features. Then, Genetic Algorithm (GA) is employed to improve the processing speed of covariance matching. To take advantage of the property of GA for the optimization in large search spaces to covariance...
Due to the artifacts in electroencephalography (EEG) data, the performance of brain-computer interface (BCI) is degraded. On the other hand, in the motor imagery based BCI system, EEG signals are usually contaminated by the misleading trials caused by improper imagination of a movement. In this paper, we present a novel algorithm to detect the abnormal EEG data using genetic algorithm (GA). After...
It's not easy to implement the mixed H2/H∞ optimal controller for high order system, since in the conventional mixed H2/H∞ optimal feedback the order of the controller is much than that of the plant. This difficulty had been solved by using the structured specified PID controller. The merit of PID controllers comes from its simple structure, and can meet the industry processes. Also it has some kind...
Abnormality Detection (AD), being the core part of intelligent surveillance systems, is calling for growing research interest due to its importance in providing higher efficiency and labor saving. In this paper, we propose a novel Bayesian Network (BN) based AD method for smart surveillance in scenes containing large scale viewpoint changes without model-relearning. In the proposed AD scheme, Reasoning...
Searching for portfolios co-integrated with an index offers new opportunities in designing robust investment strategies. The problem of finding optimal index co-integrated portfolios that are maximally stationary is combinatorial. Indeed, given a basket of equities, the portfolio/index co-integration cannot be simply expressed in terms of equity/index co-integration. In this paper we investigate the...
Digital watermarking and data hiding have gained popularity in recent years as a means of protecting digital images from theft, illegal copying and unlawful reproduction. Some digital watermarking algorithms were proposed using spatial domain and transform domain techniques. The transform domain could be DFT, DCT, DWT or SVD. Several digital watermarking algorithms using genetic algorithms are available...
Perceptual image hashing has become increasingly popular for copy detection and indexing in digital photography. While many researchers have focused on proposing image hashing algorithms that are robust under a variety of content-preserving attacks, little attention has been paid to some of the relevant practical issues, such as estimating the parameter values for these algorithms and improving their...
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