Jianqi Zhang

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The Mel frequency cepstral coefficient (MFCC) model, which is widely used in speech detection and recognition, is introduced to extract features from hyperspectral image data. The similarities and differences between speech signals and spectral image data are compared and analyzed. The standard MFCC model is then improved to suit the characteristics of(More)
Paper documents are shredded into pieces by a shredder in what is currently a common means of ensuring text information security. Because such pieces have certain characteristics, such as being of large number and low discrimination, shredded document reconstruction by a reverse operation represents a challenge. However, recovering shredded documents is an(More)
Display images under high illumination may appear to have lower lightness and attenuated contrast. In this paper, we review the image degradation phenomenon in ambient light through photoreceptor physiology. The influence of different environmental parameters and their effects on various gray areas in images can be evaluated by the cone response difference.(More)
The reorientation of lamellae and the dependence of the lamellar spacing, D lam , on polymer volume fraction, ϕ P , D lam ∝ ϕ P −β , in diblock copolymer thin films during solvent vapor annealing (SVA) are examined by combining white light interferometry (WLI) and grazing-incidence small-angle X-ray scattering (GISAXS). A thin film of lamellae-forming(More)
In support of multiband imaging system performance forecasting, an equation-based triangle orientation discrimination (TOD) model is developed. Specifically, with the characteristic of the test pattern related to spectrum, the mathematical equations for predicting the TOD threshold of the system with distributed fusion architecture in the IR spectrum band(More)
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