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In hard thresholding to scale multiplication, it is believed that the signal multiscale product must be positive and the negative correlation between adjacent scales is produced by noise. However, there is still some negative signal correlation between adjacent scales. Here, this phenomenon is deeply analyzed in typical circumstances of two dimensions. On the ground of studying negative signal correlation,...
Multiplying adjacent wavelet scales to obtain multiscale product can enhance significant structures and suppress noise, which makes it have predominance over other methods. Starting from the formation mechanism of multiscale product, soft-thresholding of multiscale product is proposed. Furthermore, we examine the mean square error (MSE) characteristics of soft-thresholding and hard-thresholding based...
Auto landing is a very complex stage of flight. Although percentage of auto landing to total flight is only 2~3%, about one third of flight accidents appear in this phase. Moreover half of flight accident of high speed jet-planes occur at this stage. In this paper, we discuss a kind of unmanned aerial vehicle which has a special figure and rigorous lateral requirements. Therefore this paper uses hierarchic...
This paper presents a new Huffman coding method based on number character. The traditional 256 code table is replaced by the 0-9 character, the space character and the enter character in this method. Meanwhile it illustrates that the value of entropy has close relations with the probability model of signal; that the same signal has various entropies under different models; and that the probability...
Integration of various fingerprint matching algorithm is a viable method to improve the performance of a fingerprint identification system. In this paper, we firstly use minutiae to align the input fingerprint image, then use filterbank-based matching algorithm. Secondly, we present a hybrid matching algorithm that uses both minutiae information and texture information. Results obtained on the FVC...
This paper proposes a clustering successive projections onto convex sets (CSPOCS) algorithm for enforcing two way constraints originated from point matching. Via point clustering, the problem of projection onto convex set (POCS) where the convex set is described by point correspondence's constraints is converted to the POCS problem where the convex set is described by cluster correspondence's constraints...
In this paper, the method of 2DPCA is analyzed and its nature is revealed, i.e., 2DPCA is equivalent to view rows of face images as training samples that constitute row training sets and then use PCA for feature extraction. We also have proved that principal component vectors extracted by 2DPCA contain redundancy in theory. Based on this result, this paper presents a new image feature extraction method...
To improve the reliability of missiles, the reconfiguring fault tolerant control system (RFTCS) should be built in the missile control system. The key problem for building RFTCS is to separate the rigid body angle signal and different order elastic oscillation caused angle signals (RSADS) from the output signals of inertia sensors (OSOIS). Firstly, the accurate location characteristics of FFT in frequency...
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