API Build-data JSON Resources
Theme

Choose how MSRBot.io looks on this device.

Auto (match system) Light mode Dark mode

Preference is stored in this browser only.

SMPTE Journal ( Volume: 100, Issue: 10, October 1991)
[ACTIVE]

The Use of Logarithmic and Density Units for Pixels

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Abbreviated Title
SMPTE J
Volume
100, No. 10, pp. 805–816
Abstract
The use of logarithmic representation for pixel data may provide maximum flexibility in several areas. The logarithmic representation seems to be an optimum coding for digital brightness representation and also allows easy conversion to and from the linear brightness domain, which is necessary for proper spatial filtering. The ability to provide latitude by simply “sliding” up and down the logarithmic curve can also provide the crucial capability to print-up or print-down or color-correct scenes after initial capture. Density units are a natural analogy to logarithmic units for digital input scanning of motion-picture film. The film itself, however, will have introduced a toe and shoulder to the dark and light parts of the image. The natural relationship between film density and logarithmic units, as well as the ability to provide latitude and correction capabilities, makes the logarithmic pixel representation a significant candidate for high-definition television (HDTV) and computer graphics.
Publication Date
1991-10-01
DOI
10.5594/J02429
ISSN
Print: 0036-1682
Link
https://doi.org/10.5594/J02429
Author(s)
Gary DemosDemoGraFX, Culver City, CA 90232.
Copyright
© 1991 Society of Motion Picture and Television Engineers, Inc.
Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J02429.json

Reference Tree

Explore all references and references to this document, as a navigable tree.

Open Reference Tree
Reference this Doc

Plain text (ISO 690 compliant)

Preview:
Gary Demos; The Use of Logarithmic and Density Units for Pixels, SMPTE Journal ( Volume: 100, Issue: 10, October 1991); SMPTE, 1991. Available at https://doi.org/10.5594/J02429
Snippet:
Gary Demos; The Use of Logarithmic and Density Units for Pixels, SMPTE Journal ( Volume: 100, Issue: 10, October 1991); SMPTE, 1991. Available at https://doi.org/10.5594/J02429

HTML (ISO 690 compliant)

Preview:
Gary Demos; The Use of Logarithmic and Density Units for Pixels, SMPTE Journal ( Volume: 100, Issue: 10, October 1991); SMPTE, 1991. Available at https://doi.org/10.5594/J02429
Snippet:
<span class="citation">Gary Demos; <cite>The Use of Logarithmic and Density Units for Pixels</cite>, SMPTE Journal ( Volume: 100, Issue: 10, October 1991); SMPTE, 1991. Available at <a href="https://doi.org/10.5594/J02429" target="_blank" rel="noopener">https://doi.org/10.5594/J02429</a></span>

SMPTE Icon SMPTE's HTML Pub

Preview:
Gary Demos; The Use of Logarithmic and Density Units for Pixels, SMPTE Journal ( Volume: 100, Issue: 10, October 1991); SMPTE, 1991
doi: 10.5594/J02429
url: https://doi.org/10.5594/J02429
Snippet:
<li>
Gary Demos; <cite id="bib-10-5594-j02429">The Use of Logarithmic and Density Units for Pixels</cite>, SMPTE Journal ( Volume: 100, Issue: 10, October 1991); SMPTE, 1991
<span class="doi">10.5594/J02429</span>
</li>

Referenced By