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A novel method of watermarking in image spatial domains is proposed in this paper. The level transformation previously proposed for embedding watermark bits into each pixel of a source image is used adaptively with estimating the resulting subjective image quality. Thus, a desired subjective quality can be achieved on the watermarked image. First, the measurements of image quality by subjective evaluations...
This paper discusses experimental verifications of a two-dimensional modular robot called ??Slimebot??, consisting of many identical modules, each of which has simple motile functions. We have so far investigated a fully decentralized algorithm able to control the morphology of the modular robot in real-time according to the environment encountered. One of the most significant features of our approach...
This paper describes an imaging sensor system that uses a composite ultrasonic array. Side lobes and grating lobes in sensor directivity appear in conventional ultrasonic arrays. However, these lobes are reduced in this new sensor system. The sensor system consists of four wide-area ultrasonic array units, which are each made up of eight small-area ultrasonic receivers. After applying delay-and-sum...
One of the most graceful phenomena widely observed in nature is self-assembly: living systems spontaneously assemble their body structure through the developmental process. Because of this case, we believe that the concept of self-assembly becomes undeniably indispensable in artificial systems as they increase in size and complexity. Based on this consideration, we intend to deal with the emergent...
Inverting signal bits is a basic operation for digital signal processing such as watermarking. A transformation from an input level to an output level that performs all the following three functions has been proposed in the previous papers: first, inverting a chosen bit; second, minimizing level change caused by the inversion; and last, varying the resultant transformed levels randomly by a stochastic...
A design of e-Learning environment is described for personalized adaptability. At first, we explain the whole system of our learning management system, WebClass RAPSODY, which has been developed to stand up to use by whole students in a university In this topic, there are two points, 1) infrastructure construction/maintenance in university, 2) improvement of LMS to use it for official lecture of university...
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