As the Internet and communication technology has developed rapidly, and information has become abundant, increasing number of digital image via Internet to disseminate, which greatly convenience to people’s use. However the information security problem, including image authentication, has been following. The image authentication based on digital watermarking is the just new technology of information security.This
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Along with the advance of information technologies, the existing systems are difficult to meet the challenges of high speed sampling, large data transmission and storage. In recent years, the emergence of compressive sensing theory has brought the revolutionary breakthrough for data collection technology. This theory employs nonadaptive linear projections to maintain the structure of signal.
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Code Division Multiple Access (CDMA) system has been widely applied in the third generation mobile communication system (3G) due to its soft capacity, soft switching, high spectrum efficiency and strong immunity to interference. In CDMA system, the signals of multiple users divide themselves from one another by depending on their different spread spectrum codes. But
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Microwave radiometer image processing and analysis plays an important role in Microwave remote sensing. Radiomete images are often polluted by noise in acquistion and transmission, which makes the quality of the images decline. Effectively remove noise and improve the image of the SNR on the follow-up radiation processing of image is necessary. In recent years,
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Along with the advance of information technologies, the existing systems are difficult to meet the challenges of high speed sampling, large data transmission and storage. In recent years, the emergence of compressive sensing theory has brought the revolutionary breakthrough for data collection technology. This theory employs nonadaptive linear projections to maintain the structure of signal.
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Stereo video quality assessment is the basement of perception and display and also the foundation of stereo video system design. The subjective methods for stereo video quality are consistent with the results of human subjective perception, but because of its poor stability, poor portability, time-consuming, costly, it will be greatly limited in practice. The existing
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Axlebox bearing is one of the key components of train bogie. The condition of the axlebox bearing has great influence on rail traffic security. A real time and effective axlebox bearing fault diagnosis method could avoid traffic accidents and reduce operation costs. By this way, we can adopt condition-based maintenance instead of preventive maintenance which
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Face recognition is a challenging research subject in the field of pattern recognition and artificial intelligence, feature extraction is a very important part in face recognition. Face recognition involves to artificial intelligence, computer graphics learning, pattern recognition, computer vision and other fields, and has a very wide range of application in the fields of public
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Image fusion is used to fuse two pictures or more to one new by appropriate algorithms.Multi-scale analysis comes from the simulation of human eyes’perception process in research on Computer Vision. And it is widely used in image fusion fields due to such good properties as localization. Images can be decomposed to several different scale parts,
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Biometric systems, such as fingerprint, iris identification, face recognition and voice verification system have been wildly used in many areas as they can offer more reliable and efficient ways of individual identification than traditional methods like using PIN code. However, these commonly used methods require users’ actions and can only provide interval identification in specific
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