The digital revolution in digital image processing has made it possible to create, manipulate and transmit digital images in a simple and fast manner. The adverse affect of this is that the same image processing techniques can be used by hackers to tamper with any image and use it illegally. This has made digital image safety and integrity the top prioritized issue in today’s information explos...

The terms Fast Fourier Transform (FFT) and Inverse Fast Fourier Transform (IFFT) are used to denote efficient and fast algorithms to compute the Discrete Fourier Transform (DFT) and the Inverse Discrete Fourier Transform (IDFT) respectively. The FFT/IFFT is widely used in many digital signal processing applications and the efficient implementation of the FFT/IFFT is a topic of continuous research.

Data acquisition (DAQ) is an important component in many fields. It typically involves the sampling of multiple analog signals, and converting them into digital formats so that they can be processed. DAQ systems also involve microprocessors, microcontrollers, digital signal processing, and/or storage devices. Many multi-channel DAQs, which utilize some sort of processing for simultaneous input ...

The paper deals with various parallel platforms used for high performance computing in the signal processing domain. More precisely, the methods exploiting the multicore central processing units such as message passing interface and OpenMP are taken into account. The properties of the programming methods are experimentally proved in the application of a fast Fourier transform and a discrete cos...

Fast Fourier Transform (FFT) is one of the most widely used algorithms in digital signal processing. It is used in many signal processing and communication applications. many of the FFT operations are performed in embedded systems. Since Embedded systems is very small processors used in almost all type of appliances from microwave ovens to cars, and many embedded systems are portable and depend...

This paper describes design aspects of a system specialized in the acquisition and processing of brain potentials (EEGsignals).The system is composed from a PC-host computer equipped with an DSP based coprocessor for accelerating certain computing-intensive operations (FFT) and an acquisition unit (Head-box) serially coupled with the stand unit.

annihilation or reduction of each kind of noise blended in correct data signals is a field that has attracted many researchers. it is a fact that fuzzy theory presents full capability in this field. fuzzy filters are often strong in smoothing corrupted signals, whereas they have simple structures. in this paper, a new powerful yet simple fuzzy procedure is introduced for sharpness reduction in ...

Digital Photogrammetry Grid (DPGrid) is the new generation of processing system with high efficiency for digital photogrammetry, developed based on computer network, cluster parallel processing and the new development of photogrammetry, in Wuhan University, P. R. China. The general situation of DPGrid is introduced firstly in this paper, including brief introduction of hardware, normal photogra...

For two-dimensional scintillation detectors based on position-sensitive photomultipliers, a new PCI or cPCI unit has been developed. It aims at fast signal and data processing by the usage of advanced technologies like digital signal processors and field-programmable gate arrays. The main features of this design are described in this paper. Digital test measurements were carried out showing tha...

The description of a digital image in terms of simple geometrical shapes, such as polygonal shapes, is a well established methodology that often proves useful for several image processing tasks, mainly to speed up image processing operations. The representation of binary images using rectangular blocks as primitives has been applied with great success to several computer vision and image proces...