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This paper examines the double compression of joint photographic experts group(JPEG) image using discrete cosine transform(DCT) technique with different quality factor(QF) for each step. Study on relatively new approaches has been reviewed for double compression of JPEG when the primary and secondary compressions have same quantization matrixes. The double compression of the JPEG image with different...
In power plants a control system is designed to stabilize output frequency and output electrical voltages in presence of variable power demand which acts as disturbance in transmission and distribution system. In this paper, Fuzzy PID is designed for MontazerGhaem power plant gas turbine (GE9001E).While designing, the identified model (linear) is correlated through fuel flow with the aim of controlling...
This paper presents a Model Predictive Controller design structure for the magnetic levitation control system based on prediction theory which gives an optimum performance under external disturbances. The conventional controller like PID gets failed to control the system effectively under such disturbances, so an accurate model and complex algorithm are required to design a self tuned PID controller...
This paper presents a new technique for unsupervised change detection in bitemporal remote sensing images using spectral change difference images and hybrid genetic FCM. The proposed method works in three steps. In the first step, three spectral change difference images:absolute value difference image, ratio image and log ratio image are computed. In the next step, a feature vector space is created...
This paper proposes an edge preserving filter for removal of impulse noise. Digital images received from various sources are often degraded due to impulse noise and thus become unsuitable for further processing. To overcome this degradation removal of impulse noise is very important. In this paper an effective and efficient method of impulse noise removal is proposed which not only removes noise but...
This paper proposes a N8(p) detail preserving adaptive filter for impulse noise removal. Impulse noise degrade the digital images due to which these images cannot be used for high level processing. Thus, image restoration becomes important. In this paper an effective and efficient method of impulse noise removal is proposed which not only removes noise but also preserves image details. The algorithm...
This paper proposes a hybrid approach by combining the evolutionary optimization based genetic algorithm (GA) and socio-political process based colonial competitive algorithm (CCA). The performance of hybrid algorithm is illustrated using standard test functions in comparison to basic CCA method. Since the CCA method is newly developed, very little research work has been undertaken to deal with curse...
Control of an industrial robot includes nonlinearities, uncertainties and external perturbations that should be considered in the design of control laws. In this paper, some new hybrid adaptive neuro-fuzzy control algorithms (ANFIS) have been proposed for manipulator control with uncertainties. These hybrid controllers consist of adaptive neuro-fuzzy controllers and conventional controllers. The outputs...
In through wall imaging (TWI), detection is possible due to dielectric contrasts between target and room environment. Complexity increases if room consists of furniture's and other objects beside desired target. Further detection of desired target becomes complex with the presence of window in back wall of room. Thus in this paper, effect of presence of window in back wall of room is investigated...
The essential problem in controlling robots is to make the manipulator follow a desired trajectory. This paper presents the genetic algorithm tuned fuzzy PID controller (GAFPID) to follow the desired trajectory for a three degree of freedom (DOF) robot arm. Numerical simulation using the dynamic model of three DOF robot arm shows the effectiveness of the approach in trajectory tracking problems. Comparative...
An iterative method for the design of two-band quadrature mirror filter (QMF) banks proposed by Cruesere and Mitra is examined and improved by designing the prototype filters using window method instead of equiripple method. The Kaiser window and Chebyshev window functions are used in the design of prototype filters. The cut-off frequency has been adjusted in this improved method instead of passband...
In the digital filter bank context, many design methods have been proposed. Most of them are for 2-band QMF FIR filter banks. The paper considers the design of (QMF) quadrature mirror filter banks using the iterative method proposed by Chang-Kann Chen and Ju-Hong Lee (1992). Simulations show that the Chen and Lee method needs much iteration. It was examined and improved by using certain modifications...
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