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In this paper, a new
method for discovering the candidate car license plate locations is presented.
First, the image is decomposed using a Haar wavelet to get the HL band with
vertical edges. Then, the HL band image is binarized using an Otsu threshold. Next
a black top-hat algorithm is applied to reduce the effects of interfering large
continuous features other than the license plate. At this time, a moving window
based modified variance score calculation is made for areas with white pixels.
This work found that the top 3 detected rectangle windows correctly locate the
license plate regions with a success rate of about 98.2%. Moreover, the
proposed method is robust enough to locate the plates in cases where the rough
vehicle position has not been previously discovered and the cars are not
centered in the image.
The identification and quality evaluation of Flos carthami were studied using tunable liquid spectral imaging instrument, to discuss the application range and advantages of spectral imaging technology in Chinese medicine identification and quality control field. The Flos carthami was indentified by extracting the normalized characteristic spectral curves of Flos carthami, Crocus sativus and Dendranthema morifolium, which were standard samples supplied by National Institute for Drug Control. The qualities of Flos carthamies collecting from different pharmacies were evaluated by extracting their normalized characteristic spectral curves. The imaging spectrum testing system was designed independently. The spectral resolution was 5 nm, and the spectral range was from 400 nm to 680 nm. The results showed that the normalized characteristic spectral curve of Flos carthami was significantly different from those of Crocus sativus’ and Dendranthema
Five kinds of traditional flower Chinese
medicine powders (TFCMD) were identified
using tuneable liquid spectral imaging
instrument, to discuss the application range and advantages of spectral imaging
technology in Chinese medicine identification and analysis field. The testing system is the liquid crystal
multispectral imaging system designed by ourselves. All the tests are standard
samples supplied by National Institute for Drug Control. The
spectral cubes of Campsis grandiflora, Carthamus tinctorius, Albizzia
julibrissin, Dendranthema morifolium, and Dendranthema indicum were
captured, and then the
normalized characteristic spectral curves of them were picked up. The spectral
resolution is 5 nm, and the spectral
range is 400 nm - 650 nm. The result shows that different
different normalized characteristic
fluorescence spectral curve. Spectral imaging technology can be used to identify TFCMD, and the testing course is
convenient, quick, noninvasive and without pre-treatment.
In order to satisfy the spectrum requirements of the
future international mobile telecommunication (IMT) systems, to realize
scientific allocation and usage of spectrum resources and to avoid spectrum
waste brought by allocation in advanced, there is a need to make a reasonable
estimation for the spectrum demands of future IMT systems. The estimation
results can also provide guidelines for the subsequent spectrum planning and
assignment work. This paper gives a description of study progress of related
spectrum estimation for future IMT systems. From the analysis of current work
and practical situation, the key factors in the estimation methodology are
summarized to provide a reference for the following work.