Computer Graphics — Computer Art by Prof. Dr. Herbert W. Franke (auth.)

By Prof. Dr. Herbert W. Franke (auth.)

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On the other hand, it also leads to insights into optical and visual data processing which are illuminating the processes of perception in general, but particularly the processes of aesthetic reception. Thus, the limitation lamented by so many artists that the computer graphic set of devices is insufficiently adapted to artistic goals is turned into a considerable advantage: aesth'etically highly effective operations, unused so far, have emerged. As desirable as is the recent development of new systems which are adapted to the needs of painters and graphic artists, this also results in negative trends - they tend to simulate the traditional artistic tools without utilizing the widely usable mathematical and logical capacities of computer systems.

It will be found that the random series soon begins to repeat itself if the exponents of the powers of2 originally chosen are too small. However, all difficulties disappear and sufficient well-distributed random numbers become available if one uses higher powers of 2, such as 2147483648, 429467296, 8589934592. The newer programming languages, as for instance several BASIC dialects, include instructions for entering pseudo-random sequences. Thus feature is mainly used for programmable computer games, but also for producing dynamic sequences.

In this working method, man's reflection periods are usually much longer than the computing time of the machine. In principle, it would be possible to utilize these breaks for other calculations. Organization programs are now available, known as supervisors, which divide the computing periods among different users in such a way that no one is hindered by anyone else (time sharing). Depending on time, it is possible to introduce further computing processes of other current programs. In practice, each user operates through a tele-system from the desk in his room.

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