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A G Vartabedian

Publications and source records attributed to A G Vartabedian.

3 recordsLinked to original sources
PubMed1973

Developing a graphic set for cathode ray tube display using a 7 x 9 dot pattern.

A symbol set for the 96 graphic characters of the USA Standard Code for Information Exchange is presented in a 7 x 9 dot matrix. The symbols are the result of studies to optimize the legibility and readability of cathode ray tube displays. The symbols are initially presented using a pattern of dots in a 7 wide by 12 high matrix. The lower three rows of the matrix accommodate the 12 characters which have descenders. These characters, however, are redrawn so that they, as well as the other ASCII graphics, fit within a 7 x 9 matrix.

Journal Article↗
PubMed1971

Legibility of symbols on CRT displays.

The effects of several parameters - such as letter orientation, slanting versus upright, dot matrix size, etc - of symbol formation on the legibility of CRT displays were studied. Symbols were tested by subjects attempting to identify them when presented briefly on the display screen. Speed and accuracy of identification were used as the measures of legibility. The 7 x 9 dot matrix symbols drawn with circular dots were superior to all others for both reaction time and errors. Slanting had a detrimental effect on dot and stroke symbols and circular dot symbols were superior to elongated dot symbols.

Journal Article↗