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In this paper, a genetic algorithm using discrete cosine transformation is proposed to speedup the fractal encoder. By using discrete cosine coefficients, the optimal Dihedral transformation between the range block and domain block can be found to save a large number of the redundant MSE computations. Moreover, combining the discrete cosine transformation technique with the genetic algorithm, the...
Owning to the rapid development of Internet, users have more chances to use multimedia data and digital contents. As a result, illegal reproduction of digital information started to pose a real problem. Digital watermarking has been regarded as an effective solution to protect various kinds of digital contents against illegal use. In this paper, a watermarking technique which applies the discrete...
This work presents a classification approach for images taken from magnifying colonoscopy. Classification is done according to the pit pattern scheme. Images are not classified directly in the proposed classifier. Instead, they are transformed to a frequency domain using discrete cosine or Fourier transformation. Feature selection is optimized using a genetic algorithm, the actual classification is...
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