A scheme is proposed for image decomposition into components having spatial frequency band and orientation selectivity characteristic of the visual system. The Hexagonal-discrete-Fourier-transform (HDFT) of an hexagon...
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This paper describes a new parallel imageprocessing system called "NOVI-ii HiPIPE" that manipulates super high definition (SHD) images. This system consists of 128 processing nodes, 4 I/O nodes for image st...
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ISBN:
(纸本)0819407429
This paper describes a new parallel imageprocessing system called "NOVI-ii HiPIPE" that manipulates super high definition (SHD) images. This system consists of 128 processing nodes, 4 I/O nodes for image storage, and 4 I/O nodes for SHD still image display. It provides extremely high computational power and high throughput rates for SHD imageprocessing. This system can transfer image data to the newly developed Super Frame Memory (Super FM) for SHD moving image display via the Ultra-network. A new Vector Processor (VP), which has a peak performance of 100 MFlops, is developed and the performance of an engineering sample version of this chip is checked. One VP will be installed in each processing node as the DSP engine and a total system performance of 12.8 Gflops (peak performance) is expected from NOVI-ii HiPIPE. Using this system, various image coding schemes and computer graphics techniques can be easily explored in spite of the huge amount of data that must be treated.
Two quantization methods for high quality image coding are presented. The goal in both methods is to keep subjective distortion below visual threshold. The first method is a discrete cosine transform coding system. Th...
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The need for transmitting an image through a low data rate channel has led to the development of various image data compression techniques. Recently, transform image coding based on the discrete cosine transform (DCT)...
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The need for transmitting an image through a low data rate channel has led to the development of various image data compression techniques. Recently, transform image coding based on the discrete cosine transform (DCT) algorithm has been proven to be a near optimum method for good quality, low data rate image transmission [1],[2]. In this paper, a CCD two-dimension DCT [3] device structure based on the recently developed one dimension CCD DCT device [4] will be reviewed. The CCD DCT device computes a 16-point cosine transform in 100 ns. The device structure is based on the vector-matrix product algorithm and implemented by using a bank of 256 fixed-weight multipliers. 60-dB dynamic range, -40-dB harmonic distortion has been achieved by the DCT device. Clocked at 10 MHz, the device is performing 5 billion computations per second and dissipates only 700 mW. The speed, power, weight and through-put rate advantages offered by the CCD technology make it ideal to be used in a low cost image transform CODECL [2].
An image is modeled by a two-parameter stochastic process generated by splitting a pixel into a block of 2 × 2 pixels thereby obtaining a higher resolution image. This sequential reproduction process is achieved ...
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This paper uses a powerful three stage mapping methodology to realize highly concurrent systolic array processor architectures for imageprocessing. The paper addresses the issues of designing special purpose systolic...
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In this paper a pel-recursive Wiener-based displacement estimation algorithm is introduced for interframe image coding applications. This algorithm is based on the assumption that both the so-called update and the lin...
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Currently there exist many parallel computer architecture for imageprocessing applications. The main goal of these architecture is to carry out imageprocessing work in a highly parallel manner so that the processing...
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An improved segmenter has been developed which partitions a monochrome image into homogeneous regions using local neighborhood operations. Perkin's well-known edge-based segmenting algorithm [1] is used to partiti...
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This paper discusses a new technique for object detection that uses fractals to model the natural background in a visible image. Our technique is based on the fact that fractalbased models have been found to be good m...
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