The main topic of the thesis is to present a method developed during my PhD studies for authenticating drawings and oil paintings based on digital reproductions. The method is capable of distinguishing authentic paintings of different artists from attempted imitations of the artist's painting style and is furthermore sufficiently stable to withstand realistic recording errors. Furthermore, a study of more general statistical properties related to quantifying artistic style in included, as well

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... s a suggestion for a metric between EMG signals. iii iv Preface This is an extended version of the submitted paper with more artistic considerations and elaboration of technical details. 45 CHAPTER 4