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Rate and quality-constrained rate control is very effective for video applications, since it can maintain constant quality while eliminating local rate spikes. An adaptive rate control method based on image activity measures (ARCIAM) is proposed for Motion JPEG2000. The algorithm can efficiently adjust the compressed bit rates to meet the rate and quality constraints for different types of colour...
In this paper, we propose a novel skeletonize method for multi width ribbon-like shapes. The two difference images with vertical and horizontal directions respectively are computed to locate the singularities of the original image. Then the gradient directions of these singularity points are computed. The skeletonization can be obtained by finding the centers of via pair wise singularity points using...
In this paper, we propose a novel method for edge detection based on difference images. In order to increase the ability of difference images in direction detection, we propose a maximum modulus technique, whose singularities are located both by the gray differences and maximum gradient directions. That is, the singularities are located along the gradient directions with maximum difference modulus...
To compensate for the dynamic friction effects in the high precision turntable system, a control scheme using adaptive sliding mode techniques is proposed. The friction force in the turntable system is characterized by the Lugre dynamic friction model. Both the system parameters and the dynamic friction parameters are assumed to be unknown, but each of them belongs to a known bounded region centered...
This paper proposes a simplified vector control implementation strategy that can be realized in the absence of current sensors. In order to decouple the torque and flux in the determination of the three-phase voltage reference commands of the SPWM inverter, both stator and rotor currents in the stationary and rotating frames can be derived from the corresponding rotor flux-oriented vector control...
This paper proposes an improved three-level zero-voltage zero-current soft-switching (ZVZCS) half-bridge type DC/DC converter. In order to turn off the inner switch in zero-current manner, a tapped inductor is designed to reset the primary circulating current during the freewheeling interval. Consequently, the resetting voltage and the time can be regulated conveniently by setting the turn ratios...
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