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In our earlier study, we proposed an image morphing based method for information hiding. The basic idea is to hide a secrete image into a morphed image which is obtained from the secrete image and another reference image. To make this method practically useful, it is necessary to produce natural morphed images. This is a necessary condition conceal the existence of the secret image. To produce natural...
Nowadays, “cards” are becoming part of our lives. To prevent the cards from being illegally used, card user authentication is indispensable. A common practice for user authentication is to use some secret information known or possessed by the true card holder. However, if the secret information is leaked, some malicious third party may still be able to use the card illegally. To solve the problem,...
Nowadays, “cards” are becoming part of our lives. The cards enable us to obtain different kinds of services conveniently, but may also bring us economic loss if they are used illegally by some malicious third party. A common practice to solve the problem is to ask the user to provide some personal information possessed by the true card holder only. However, the personal information can be leaked if...
Pose recognition is important in many practical applications. For example, a driver assistance system can detect if the driver is tired, sleepy, or careless from the poses. A pet robot can detect certain behavior patterns of the human user. The main purpose of this study is to develop a driver assistance system that can protect the drivers from careless accidents. As the first step, we propose a system...
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