Journal of the Society of Motion Picture and Television Engineers ( Volume: 61, Issue: 5, November 1953)

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Psychometric Evaluation of the Sharpness of Photographic Reproductions

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: Psychometric methods were used to evaluate the relative sharpness of a number of photographic reproductions in which sharpness was the only significant variable. Since sharpness is an observer's subjective impression of an aspect of picture definition, the methods for deriving sharpness values involve introspective processes and methods of quantifying these subjective impressions. Although no physical measurements of any aspect of the stimulus are involved in deriving sharpness values by the psychometric method, repeated evaluations showed that the scale values obtained are a reliable indication of the sharpness attribute of a photographic reproduction. Three methods of quantifying the judgment data were used, and the sharpness ratings obtained from all three were in good agreement with one another. Projected transparencies gave substantially the same results as paper enlargements. Attempts to correlate the sharpness ratings with physical measurements of some aspect of the developed image were not entirely successful; neither resolving power nor simple density relationships across an abrupt boundary between light and dark areas resulted in satisfactory correlations with sharpness ratings.
Publication Date: 1953-11-01
DOI: 10.5594/J00964
Link: https://doi.org/10.5594/J00964
Author(s): Robert N. Wolfe, Fred C. Eisen

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Robert N. Wolfe and Fred C. Eisen; Psychometric Evaluation of the Sharpness of Photographic Reproductions, Journal of the Society of Motion Picture and Television Engineers ( Volume: 61, Issue: 5, November 1953); SMPTE, 1953. Available at https://doi.org/10.5594/J00964

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Robert N. Wolfe and Fred C. Eisen; Psychometric Evaluation of the Sharpness of Photographic Reproductions, Journal of the Society of Motion Picture and Television Engineers ( Volume: 61, Issue: 5, November 1953); SMPTE, 1953. Available at https://doi.org/10.5594/J00964

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<span class="citation">Robert N. Wolfe and Fred C. Eisen; <cite>Psychometric Evaluation of the Sharpness of Photographic Reproductions</cite>, Journal of the Society of Motion Picture and Television Engineers ( Volume: 61, Issue: 5, November 1953); SMPTE, 1953. Available at <a href="https://doi.org/10.5594/J00964" target="_blank" rel="noopener">https://doi.org/10.5594/J00964</a></span>

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<li>
Robert N. Wolfe and Fred C. Eisen; <cite id="bib-10-5594-j00964">Psychometric Evaluation of the Sharpness of Photographic Reproductions</cite>, Journal of the Society of Motion Picture and Television Engineers ( Volume: 61, Issue: 5, November 1953); SMPTE, 1953
<span class="doi">10.5594/J00964</span>
</li>