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It is the evaluation of the subjective fidelity which is of primary importance in any communication system where humans constitute the final information receiver. A method showing how to generate grey-tone increments by computer for displaying simulation results is described. The method is based on the fact that, by over-printing well-defined characters of a commercially available chain printer, grey tones can be produced. The set of characters and the number of overprints used is presented in matrix form.
Computer applications, man-machine interaction, output devices, systems evaluation and measurement.

P. Stucki, "Generation of Grey Tones by Computer for Simulation of Visual Information Systems," in IEEE Transactions on Computers, vol. 18, no. , pp. 642-643, 1969.
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