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Journal of the Society of Motion Picture and Television Engineers ( Volume: 58, Issue: 4, April 1952)
[ACTIVE]

The Nature and Evaluation of the Sharpness of Photographic Images

Metadata

Publisher
SMPTE
Doc Type
Journal Article
Article Type
research-article
Abstract
The ability of a photographic material to produce pictures having good definition is commonly referred to as its sharpness, which is a subjective concept. The objective quantity 〈G2x〉Av. DS is shown to be a physical measurement which correlates with sharpness judgments. 〈G2x〉Av is the mean of the square of the density gradients, ×D/×x, across an abrupt boundary between a light and a dark area in the developed image and DS is the density difference between these areas. 〈G2x〉Av is evaluated only for those values greater than 0.005 in density per micron which represents the threshold gradient. It is shown that, contrary to the generally accepted belief, resolving power does not correlate well with sharpness judgments and in some cases is even misleading.
Publication Date
1952-04-01
DOI
10.5594/J01196
Link
https://doi.org/10.5594/J01196
Author(s)
G. C. Higgins, L. A. Jones
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G. C. Higgins and L. A. Jones; The Nature and Evaluation of the Sharpness of Photographic Images, Journal of the Society of Motion Picture and Television Engineers ( Volume: 58, Issue: 4, April 1952); SMPTE, 1952. Available at https://doi.org/10.5594/J01196
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G. C. Higgins and L. A. Jones; The Nature and Evaluation of the Sharpness of Photographic Images, Journal of the Society of Motion Picture and Television Engineers ( Volume: 58, Issue: 4, April 1952); SMPTE, 1952. Available at https://doi.org/10.5594/J01196

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G. C. Higgins and L. A. Jones; The Nature and Evaluation of the Sharpness of Photographic Images, Journal of the Society of Motion Picture and Television Engineers ( Volume: 58, Issue: 4, April 1952); SMPTE, 1952. Available at https://doi.org/10.5594/J01196
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<span class="citation">G. C. Higgins and L. A. Jones; <cite>The Nature and Evaluation of the Sharpness of Photographic Images</cite>, Journal of the Society of Motion Picture and Television Engineers ( Volume: 58, Issue: 4, April 1952); SMPTE, 1952. Available at <a href="https://doi.org/10.5594/J01196" target="_blank" rel="noopener">https://doi.org/10.5594/J01196</a></span>

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G. C. Higgins and L. A. Jones; The Nature and Evaluation of the Sharpness of Photographic Images, Journal of the Society of Motion Picture and Television Engineers ( Volume: 58, Issue: 4, April 1952); SMPTE, 1952
doi: 10.5594/J01196
url: https://doi.org/10.5594/J01196
Snippet:
<li>
G. C. Higgins and L. A. Jones; <cite id="bib-10-5594-j01196">The Nature and Evaluation of the Sharpness of Photographic Images</cite>, Journal of the Society of Motion Picture and Television Engineers ( Volume: 58, Issue: 4, April 1952); SMPTE, 1952
<span class="doi">10.5594/J01196</span>
</li>