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Solar flare is the most violent solar activity which is the main driving source of space weather, so accurate prediction of flare occurrence in coming days would manner disaster treatment and protection. Due to detailed reasons of solar flares eruption are not clear in current field, so the prediction clues rely mainly on observing solar images. Many predictors have been used for solar flare prediction,...
In robot soccer competition, it is important that the robot can identify and approach the ball quickly and accurately. This paper presents a fuzzy control method which could improve the accuracy and speed to recognize ball. The conventional robot control consists of methods for path generation and following. When a robot moves away the desired track, it must return immediately, and while doing so,...
This paper presents a simplified dynamic object recognition algorithm. This algorithm, with a combination of region-based matching and feature-based matching, uses only a small amount of computation to achieve rapid identification of a target positioning. Experiments indicate that the algorithm shows smooth and fast recognition and accurate positioning on a single video track of the dynamic object...
In this paper, we describe a block-based threshold modulation error diffusion algorithm to parallelize the halftone process without generating both block-boundary and diagonal artifacts. A novel scan path is used to pass quantization error effectively between blocks, and the input-dependent threshold modulation is applied during the inner-block processing. To obtain suitable parameter set for the...
In order to implement the sharing of remote sensing data over the Internet, we proposed an original approach to acquire and integrate remote sensing image metadata using grid service. Firstly, we encapsulated the metadata extracting algorithms and metadata retrieving algorithms into grid services, which can be called on the Web with SOAP messages; secondly, a grid service registry that enables the...
Image fusion is becoming one of the hottest techniques in image processing. The paper proposes a shared chain mutual information concept to quantitatively and objectively evaluate the performances of difference image fusion techniques. Furthermore, the performances of two widely used image fusion techniques, i.e. wavelet transform based fusion and pyramid transform based fusion operating on a typical...
Using the LBI (long baseline interferometer) mounted a moving observer, passive location system measures phase difference of emitting signals, tracks stationary and moving emitter. The system is more accuracy than bearing only passive location system. In this paper, the observability of the phase difference system is analyzed, and necessary and sufficient conditions of the phase difference system...
An image processing method for the calculation of waveguide invariant (beta) with passive sonar lofargram image is presented in this paper. Concise formula for calculating beta was then derived by finding the two-dimensional Fourier transform ridges of the lofargrarns. The algorithm was exercised for a Pekeris waveguide and a simulated shallow water waveguide containing thermoclines with source depth...
In the paper, to improve the signal detection performance in an oceanic reverberation environment, the algorithm based on whiten filter, beamforming, and mathematical morphology from image processing was presented as well as the parameters selection method of the detector. The result of an oceanic experimentation presents that the algorithm does improve the performance in the oceanic reverberation...
Wavelet transform (WT) based image fusion techniques have been widely studied and applied in hyperspectral data processing research. Generally, image decomposition, sub-image fusion, and image reconstruction are the main steps for a WT based image fusion. The performances of fusion methods are basically dependent on the fusion scheme and its related transform. In this paper, we mainly discuss the...
Image fusion provides a useful tool to integrate multiple images into a composite image that is more suitable for the purposes of human visual perception and can help us to extract more features. In this paper we compare the wavelets-based schemes which are based on ordinary wavelet transform, wavelet packet analysis and the nonlinear fusion scheme. It is concluded that the nonlinear fusion scheme...
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